C4 corvette egr delete. com about it but most of those guys are doing it on LT1's.
C4 corvette egr delete C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale/Wanted; C4 Parts for Sale/Wanted; C4 C3 Tech/Performance - EFE + EGR Delete for Sniper EFI - vacuum lines - Hi all, Iv'e just joined the forum as I've bought a 1979 C3. C4 Tech/Performance - Delete EGR From Tune - Hi guysHow do i delete the EGR from my tune using Tunerpro. C4 General Discussion - 1985 EGR block off - I'm looking to block off my EGR valve with a plate. C4 Corvette Forums. C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale/Wanted Anyway I did and EGR Delete on my 97 C5 Corvette when i put my new headers in i decided to delete the EGR now what i did was CRIMP the hoses and got it tuned out now what i want to do is to fully remove those hoses and the unit C4 Tech/Performance - EGR Valve Replacement Procedure - What is the easiest method at getting at the egr valve on a '87 L98 Corvette to replace it, ie what parts do I have to take off to get at it? LOG IN; REGISTER; This will get you to the EGR. Thread Tools Search this Thread Jul 5, 2019 | 06: C4 Tech/Performance - Help me delete my EGR - I'm getting ready to install my LT headers and have been debating on whether or not to delete my EGR. I can find the EGR block off plate but i dont see one for the heat tube at the rear of the manifold. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR delete posibility. Pic's if possible. I followed a B body EGR Delete that was generated by EEHack online tool. Just in case you never knew this,the ERG does not operate at WOT. Show Printable Version. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Help me delete my EGR. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Egr delete kit I have a 1986 350 tpi engine in my C4 corvette and I’m looking into getting a delete kit for it but I’m not sure if the one I’m looking at will work The website that I’m looking to buy it off of is on here I’m really just curious if the bolt that comes C3 General - 1973 EGR Delete - Hello. Maybe the entire engine. Reply C4 Tech/Performance - Strange EGR Delete method??? - Have been battling a P0400 EGR Malfunction on my 1996 LT1, and came across something that looks to me like a crude way of deleting the EGR. question is if i delete the egr with a block off plate do i need to reprogram ECM since there are no codes (32) for 1984 c4Anything else im missing besides vacuum lines? thanx C4 Tech/Performance L98 Corvette and LT1 Corvette Technical C4 Tech/Performance - 87 EGR Valve (Keep or Remove) - Hello All, My 87 has a bad EGR valve and I was wondering if it's worth replacing it or just removing it? A new EGR runs about $70 and I did read the article from Vader86, but I'm still unsure what to do. guru is your independent Corvette resource. Switch - First time doing this how tricky is it ? and how long should it take? C4 Corvettes, 1984 - 1996; C4 Tech/Performance; Replacing EGR Temp. Sponsored by: 86 EGR C4 Tech/Performance - EGR Delete howto - SoI've started thinking of deleting my EGR system on my 1985 C4. The headers I ordered were supposed to have the EGR tube, C4 General Discussion - Smog Pump Delete - So back in September or so my smog pump went out and I replaced it with an idler pulley. Looking at it i am confident it is not working. Thread Tools Search this Thread Oct 14, 2019 | 11:26 AM C4 Tech/Performance - Smog/A. C4 Tech/Performance - 85 emissions delete - good morning all. View Next Unread. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Remove EGR from 1986E coupe. C4 Tech/Performance - egr delete ? - i just got my used set of em long tubes non emission headers so i bought a egr delete plat kit, what probs if any will i run into using this kit? has anyone else used a egr delete kit any help appreciated thanks mike C4 Corvettes, 1984 - 1996. In this video I will be removing the EGR valve on a 94 C4 Corvette with a LT1. Thread Tools Search C4 Tech/Performance - FIRST TPI Intake EGR Delete? - I'm almost done buttoning up the FIRST TPI intake install on my '90 L98, and initially I had assumed I would be deleting the EGR setup. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR delete on C4 Tech/Performance - LT1 EGR RemovalPros/Cons/How To - Well considering how much of a pian in the butt it is to pull the egr everytime you take off the headers or the intake manifold on an LT1, I was wondering what was to be gained by removing it completely. Other says that you need to richen up your tune when you delete EGR. C4 Corvettes, 1984 - 1996; C4 General Discussion; 86 EGR delete question; C4 General Discussion General C4 Corvette Discussion not covered in Tech. That being said,I disconnected the EGR valve in my 3. This You can remove all EGR equipment (hoses,vacuum lines valves,pump,etc. You can run AIR/EGR without cats if you wanted to. Application. Without this just leave the EGR delete, and hope the programmer did it right. I believe that will open up a vacuum port under the throttle body. R pump delete - After a recent upper rebuild I've been thinking more and more about deleting the AIR pump. PO removed pretty much the entire evap system from the car, but left the unhooked EGR on top of the engine. It is in the process of having long tubes put on. Then up and over the hose. C5 Tech - EGR/A. Is that true? Remove the air pump, both diverter valves, and all the lines attached to them. With a new engine I would not hesitate do Hi there, will deleting the EGR on a 91 C4 corvette cause any issues (except the service engine soon light)? Someone told me that I would need a different self-egr-ing camshaft. It's not in the way of anything back there, easier and much cheaper to just leave it there. Just compared the bins from a normal LT1 Y body and tried to get everything related to the EGR / AIR pump system. It seems that alot of people seem to remove it entirely instead of fix it. that has several lines attached. I am really considering removing all the emissions stuff from my 85 corvette. ) i want to get rid of the EGR. From restoration to performance we offer the highest quality parts & The headers would have to be prepped for EGR to provide exhaust gases to the intake port. (On a side note, I highly recommend the CNC machined smog pump delete kit C4 Tech/Performance - 1989 Full Exhaust Upgrade Hedman Long Tube Headers 68448, EGR Smog Cat Muffler Delete - Here is a writeup for a full exhaust upgrade to C4 Tech/Performance - EGR block off for LT1, performance gain? - What are the benefits of disabling the EGR on an LT1? C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine but another thing to remember is by removing all the emission components, you are devalueing not only the environment C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine 1992 EGR delete without throwing code? But then you can do as above and remove Code 32 and EGR function, block off the ports and be done. I may just fab a plate and RTV it in place. The ones im finding on ebay look rough im wondering what it takes to delete the egr tube. I'm looking for options to deal with ECM related issues related to fuel ratio's etc. Two of these screw into the intake and two go into the exhaust manifold. Join us for Corvette Forums, community, tech library, Guru dictionary, and more. According to the diagram I got from someone on the board a while back, a vacuum hose comes from the canister to the sensor, C4 Tech/Performance - EGR Delete Question - 1988 Vette, TPI I just installed a ported intake (Stage 3), American Racing Headers (1 7/8 ) long tubes, Xpipe. I had PCM forless C4 Tech/Performance - Egr valve removed vacuum lines can I remove? - Hi, Egr valve deleted,what associated plastic vacuum line/hoses can I remove. Plan is for it to be a running project - it C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine AIR Pump Delete. Switch You shouldnt have to remove EGR valve You might want to put a meter across it to make sure it's bad. If its not removed from the chip the ecm will make C4 Corvettes, 1984 - 1996. Also as far as a stuck egr, it depends how far open the egr is stuck,if C4 General Discussion - Effect of smog pump and EGR delete on emission tests - Curious from people who have done either or both deletes if they can still pass emissions - I'm not sure if one or the other or both systems are critical to meet emission standards. C4 Tech/Performance - EGR delete? - So I just recently bought some new headers and an exhaust for my 1989 corvette and had a random question about the EGR system. Make sure you cap it off. It gets and supplies its exhaust to the intake itself. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Strange EGR Delete method??? Reply You can remove everything that is connected to the AIR system. You need to remove the plenum. It has no impact on open throttle performance. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine LT1 EGR block off plates? Reply Subscribe . 2K I would like to remove the EGR valve and related components. C4 Tech/Performance L98 C4 Tech/Performance - EGR delete on a 94. C4 Tech/Performance; C4 General Discussion; C4 ZR-1 C4 Tech/Performance - vacuum line after egr delete - Im about done doing a headgasket replacement on my 87 vette and im deleting my egr,air pump basically all the smog stuff. Reply Subscribe . C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale/Wanted; C4 Parts for Sale/Wanted; C4 Vendor for Sale; C3 Corvettes, 1968 - 1982. Remove these four screws and note the gaskets on both ends of the tube as they are easily damaged. If you remove the EGR and/or EGR sensor switch you'll get a code 32 because C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Successful 86 Vette EGR/AIR/Emissions System Removal - For the curious. The Performance LT1 EGR Block Off Plates fit 1992-1996 Corvette models. )except the EGR solenoid at the manifold. I believe it's necessary to remove the EGR tube on the passengers side (the ugly thing covered with insulation) but looking at it I This complete kit includes the three necessary plates needed for the removal of your EGR system on the 92-96 LT1 engine. C4 Tech/Performance - Should I remove my EGR valve, or not??? - Who has removed there EGR valve, and what is what is the proceedure? I have 60,000 miles on my 88 L98, and have been working in the engine area. . com about it but most of those guys are doing it on LT1's To check for a cracked diaphram just spray some carb or TB cleaner under the EGR valve, if the idle picks up you have a cracked or leaking diaphram. Its on an 89 there is a rubber block attached to one of the thermostat housing bolts. You need to leave the solenoid plugged in electrically to With EGR deleted, you'll no longer be injecting soot into your intake, which can plug up ports and get carbon stuck all over your valves. Next EGR does very little on your particular car/motor to harm performance. Removing it / disabling it will noticeably decrease your gas mileage. Is that true? Does anyone have experience without the EGR and long distance travel? Ok but what about the deleted EGR? Reply reply More replies. Has anyone done this yet and do you have advice. I do not intend to add the AIR system back in as emmissions are not a concern, but I would like to add the EGR back in. C4 Corvettes, 1984 - 1996; C4 General Discussion; Effect of smog pump and EGR C4 Tech/Performance - Removing EGR valve on an LT1 - All of the threads pulled up by search seem to have been archived I attempted to remove my EGR valve for cleaning this morning, but I couldn't figure out how to get it off of the car the valve itself is too close to the bolts holding it on to the intake, so I C4 Tech/Performance - Removing/reinstalling L98 EGR Pipe clamp? - I'm getting ready to do the passenger side valve seals on my '87 within the next few days. I found out the hard way. help please - Decided to put my shorties back on last night on my 94 LT1 and totally butchered the passenger side fitting so I am considering deleting the EGR and AIR system all together. fuel rail assy removal Thread C5 Tech - AIR/EGR delete - My brother has a 1999 LS1 corvette. 85 corvette, I've completely De-smogged the entire engine compartment, Air pump gone exhaust manifold capped off, all hoses piping, valves removed. question is if i delete the egr with a block off plate do i need to reprogram ECM since there are no codes (32) for 1984 c4Anything else im missing besides vacuum lines? thanx C4 Tech/Performance L98 Corvette and LT1 Corvette Technical C4 Tech/Performance - EGR & Emissions Removal - 1993 LT1 - The new American Racing Headers I will be installing were ordered without the emissions fittings. C4 Corvettes, 1984 - 1996. C4 Technical > EGR removal and block off plates With EGR deleted, you'll no longer be injecting soot into your intake, which can plug up ports and get carbon stuck all over your valves. I know I am missing a step here, since my idle has jumped up Hi there, will deleting the EGR on a 91 C4 corvette cause any issues (except the service engine soon light)? Someone told me that I would need a different self-egr-ing camshaft. Anyone have experience with this? C3 Tech/Performance - '75 LS1 Swap - EGR Delete Questions - Good Afternoon All, I am putting the 2002 Z28 LS1 back together for the swap into my '75 coupe and wondering how I address removing the EGR. The egr valve has beeb removed. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical C4 Tech/Performance - 85 AIR pump and EGR deletion - I'd like to delete both of these, not to make the car faster, but to clean up the engine bay. After searching online I decided to delete a noisy air pump. C4 Corvettes, 1984 - 1996; C4 General Discussion; Cleaning your EGR valve; Notices. In this video I will be removing the EGR valve on a 94 C4 Corvette with a LT1. With a new engine I would not hesitate C4 Corvette Forums. Also disconnected the EGR valve. All went well, until I had the bright idea to clean up the engine bay and remove the rest of the system sitting up top. the EGR operation must be turned off. The kit includes intake and header plates and all three plates are CNC laser cut from mild steel and finished with C4 Corvette Forums. Thread Tools Search this Thread Feb 7, 2024 | 09:06 AM It's silly to remove the EGR. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine In order to remove the two bolts holding my EGR on, I had to bend Putting these Performance LT1 EGR Block Off Plates on your Corvette takes 2 hours to install. 8 Minivan and it pinged like a madman on part throttle and hills. Back to Subforum. It permits greater timing advance w/o pinging and With EGR deleted, you'll no longer be injecting soot into your intake, which can plug up ports and get carbon stuck all over your valves. I understand the air pump will stay for the serpentine belt. As such, it MAY not need an EGR anymore. :cheers: the air pump was by passed C4 Tech/Performance - how to remove EGR tube (and valve covers) on L98 (1987)? - I'm planning to change valves and springs and realize that I'll have to take off the valve covers first. C4 Tech & Performance 1993 LT-1 EGR Removal. I also had my check valves on my headers removed as well. C4 Corvette EGR delete. advantage, advantages, c4, corvette, delete, deleting, disadvantage, disadvantages, downsides, egr, erg, removal, remove, removing, whats. C4 Corvettes, 1984 - C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR system. View Next Unread ~~~ St Jude Auction # 15 * VERY LIMITED 1956 Sebring Sunset C4 Corvettes, 1984 - 1996. I will remove the EGR down the road if and when the intake is removed. Question about EGR/Tune. Jump to Latest 7. C4 Tech/Performance - EGR delete posibility - So I was dismantling the top half of the engine in preparation for a base/runner/plenum swap and noticed that I have a faulty egr valve. Cleaning up the engine compartment on my 1973 K-10 and discovered that I have a corvette intake. None of the AIR system is connected with the EGR system. New Member. The egr gets its exhaust from elsewhere. Fortunately the headers they put on have the tapped holes for the AIR tubes. Reply EGR & AIR delete on ARAP $6E. And C4 Tech/Performance - Delete the Egr and crossover tube - So my cross over tube for the egr has cracked! I have a 1986 corvette with a l31 vortect 350 with the special tpi intake so all the corvette stuff fits. C4 Tech/Performance - 1984 egr delete question - hello, ive found good info for every c4 except 1984. In some instances,it may actually hurt performance to remove or bypass an EGR system on certain engines. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR delete? Reply Subscribe . Anyways if anyone know of an EGR delete plate/kit please let me know. I noticed the plastic vacuum lines are very brittle. There is one vacuum line with a t in it at the back of the manifold and there is 2 places on the pass side of the plenum for vacuum and 1 on the C4 Tech/Performance - Replacing EGR Temp. I should be able to C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Corvetteforum. 3K views 10 After doing some research, I've read that some people delete their EGR system and all is fine. Looking for experiences with passing emissions afterward assuming that codes are deleted and testing is primarily tailpipe. I would imagine the EGR gallies C3 Tech/Performance - 1982 EGR Delete - Anyone with an 82 deleted the EGR? Can I expect any computer codes? Been investigating and it seems like later years produced codes and problems. I am very happy now that my system is gone for good. The tool they sold for the C4 94-95 LT1 was very I have purchased the kit to remove my air pump on my L98. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes, 1953 - 1967. Everyone seems to be removing the egr system and I am looking to replace mine. Jump to Latest 5. Thread Tools Removing EGR/AIR might not give any power but it damn sure makes everything in the engine compartment easier to work with. Anyone know how to do this, Also how to lower fan on temp. I. T. The block off plates and the hardware removal are the The EGR tube on my 89 is secured with 4 Torx bolts. C4 Corvetteforum. I 94 C4 Corvette LT1 EGR Blockoff Or Delete. C4 Corvettes, 1984 - 1996; C4 General Discussion; Location of EGR valve 95? C4 General Discussion General C4 Corvette Discussion I just fished the EGR valve around the hose that runs above it by removing the nuts, sliding the EGR off the studs, then worked it rearward toward the firewall. So really no power to gain anywere,unless it's defective and stuck half open,then you'll probably hear some serious Yes the EGR can help cool combustion temps nearly 500 F. C4 Tech/Performance; C4 C4 General Discussion - 86 EGR delete question - I am deleting the EGR. This vehicle is no-longer required to have emissions, so I'm looking to clean up the engine bay. Removal on a C5? - I've searched and searched on here and can't find anything on a C5 how to do this? Tons of info for C4's but nothing on the C5's :) I'm debating whether to do this modification or not, i've read tons of pages on LS1tech. Is there anything I will need other than the 2 Block Off C4 Tech/Performance - Who's done EGR delete on L98, I need help - '90 auto, I need help with the vacuum lines. Are there any performance gains from removing the EGR system all together? Engine is completely factory. and will either have to make some block off plates for the headers, or C4 Corvettes, 1984 - 1996. It's only active at part throttle and helps prevent detonation. C4 Tech/Performance. Deleting the EGR will set a code, which is no biggy to fix C4 General Discussion - Air Pump EGR delete, high rpm - I own a 1985 manual. The EGR does not bolt directly on. Installation of the new Shop C4 1985-1991 Chevrolet Corvette Aluminum Air Pump Delete Pulley Kit - CA at Top Flight Automotive. I've seen a few posts on removing the EGR Valve and associated piping, but nothing specific to the 1993. Back C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine egr removal 92. That engine C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR & AIR delete on ARAP $6E. Warranty There is a limited warranty on this product. The car is mostly stock, including the C4 General Discussion - Egr delete? Headers - Any suggestions on egr delete headers for a 95 vert with manual 6? any possible problems with the pcm? Log In; Register; Forums. Email this Page C4 Tech/Performance - 1989 Smog Pump Delete Question - Guys, I broke down and bought the 89 Vette as the owner actually fixed the surging issue and some other issues. Intros; C4 Corvettes, 1984 - 1996. C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale/Wanted; C4 Parts for Sale/Wanted; C4 Tech/Performance - Removing EGR/air system from 92 - I'm in the middle of a big ongoing project with my 92 LT1. I beleive all of the air divert valves and tubing running to the cat is to be removed aswell. A Barn Find Thread Tools. If you short the EGR sensor switch to ground you'll get a code 32 when you start the car because it's not supposed to be grounded at that time. Some questions 1. The shop said the EGR tube needs to be extended and the X pipe he has will not mate up to his Corsa catback. C4 Tech & Performance. 1986, 2, 86, chevy, clamp, corvette, cover, egr, exhaust, l98, pipe, removing, tool, tube, valve. There is a sensor mounted on the top front of the manifold arount the water neck. Can I just delete the EGR's and what about the harness. Cannot pass emmision testing with out it. The Nox is double the allowable limit. Your air system can be kept if you want it just leave on if you want to take it off you have to have the codes edited out of the ECM from someone with hptuners ,efilive, ect. I will be using A blockoff plate t All you have to do is put a peice of stainless between the Intake and the EGR port on the cylinder head, remove the pump, disconnect all lines, replace the EGR valve with a How to delete a EGR and a smog pump in a 1987 C-4 Corvette I. C4 General Discussion General C4 Corvette Discussion not covered corvette, delco, diagram, egr, remove, replace, valve, vette. This will tell you how to do that and has some nice pics: C3 General - Egr delete - How do I correctly do a egr delete in my 82'? Or should I say is it recommended? LOG IN; REGISTER; Forums. Jump to Latest Yep,i did that,got the code 32,in the 89,the chip had to have EGR deleted to make the light go out. C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale C4 Tech/Performance - Remove EGR from 1986E coupe - I have a 1986E (cast iron heads) coupe that I want to remove the entire EGR system from (valve, sensors, vacuum lines, etc) and just go without. As I've read more about it, I'm second guessing this approach and potential consequences. I will be using A blockoff plate t I recently bought an 85 C4, due to a low speed miss I disconnected the EGR vacuum, this corrected the miss. R. Thread Tools Search this Thread Aug 3, 2004 | 12:21 AM C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Egr delete chip. If I do remove the EGR, does someone make a block off plate When you see people with larger cams removing the EGR, the overlap created by those cams can induce it's own source of charge dilution (through reversion). bypass, c4, corvette, delete, deleteing, disable, egr, egrs, removal, remove, software, tune, tunercat, tuning, z06. Cold it should read open and warm/hot C4 Tech/Performance - JET DST help - how to delete EGR/AIR/Cats - Installed long tubes, AIR pump is gone, cats and rear O2's are gone. C4 Tech/Performance - EGR delete - With my new combo in process to be insatlled (383 with superram and 219 cam. it takes more than just unchecking the diagnostics box. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine EGR Delete howto. I think I've adjusted the correct items in JET DST but I can't find a lot of C5 did not come with egr, if you got an intake from a f-body then that may have a hole for it, but not if its a ls6 intake(2001 +). C4 Tech/Performance; C4 General Discussion; C4 ZR-1 Discussion; C4s for Sale/Wanted; C4 Parts for Sale/Wanted EGR Delete OBD1 1994 Corvette I removed the EGR and AIR Pump when I put headers on the LT1 corvette. Thread Tools Search this Thread Feb 14, 2010 | 09:27 PM From what I understand to do the job right you also should have the egr deleted from your chip. It is held C4 Tech/Performance - 1984 egr delete question - hello, ive found good info for every c4 except 1984. I just bought Hooker 2151 long tubes from Jet Hot yesterday ($600 shipped) and paid a little extra to have them weld in the o2 bungs for me so I won't have to mess with it (from what I understand I have C5 Tech - EGR delete and emissions - Planning on doing the LS6 intake on my 99 A4 with necessary EGR delete. C4 General Discussion. Creations Issac Travis I recently bought an 85 C4, due to a low speed miss I disconnected the EGR vacuum, this corrected the miss. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine I soon wanted to remove the egr also but the computer would need flashed Delete EGR? Im confused - Q1-I've had major hesitation issues @ low RPM and I think I've got it narrowed down to a bad EGR. C4 Tech/Performance - EGR System - This is the EGR tubing on my passenger side exhaust. I was testing a possible EGR problem at the time with it. Thread Tools If you want to remove the AIR/EGR system then you will need to buy some block off plates to get rid of this system. C1 & C2 Corvettes; C1 & C2 C4 Tech/Performance - EGR "un-delete" - I have a 93 LT1 that a PO deleted the AIR and EGR system on. Thread Tools At almost the C4 Tech/Performance - The Dreaded EGR Valve Replacement - L98 - I have an 86 coupe and found out I need to replace my EGR valve (I can clean it, but would rather replace). bspkpfqdzzcqevquipatgrulpjlucnjghbbcnbgraousutkopxuvjzabxnngwpvaoytidmduriegwyjipsnd