I THINK I BROKE MY C4 CORVETTE

[@ReynoldsRides]

Just to clarify, my ‘89 C4 isn’t going anywhere. Also, the code causing the light is code 32 (EGR system error). I know it’s a best practice to always pull codes when a CEL comes on but I didn’t do that right away because the EGR switch/sensor was literally the only thing I touched before the light came on and I knew a code would only be general and ambiguous in nature and wouldn’t really tell me what the exact issue was. So, I usually do pull codes when a CEL pops up but didn’t this time because I felt very strongly that the circumstances were pointing to the switch/sensor. I also wanted to use the situation as an excuse to start replacing switches/sensors that I believe have been on the car since new 😬.

[@brianarnold2241]

I changed the EGR Valve for a new one last night and had the negative battery cable disconnected the entire time it took me to change It. I also changed the spark plugs. My next guess is the O2 Sensors.

[@phillymikea]

Last night I bought a 96 C4, 30k miles, really nice condition . It delivered with low fuel. I drove to the gas station to fill up, had no idea low was almost dry!! The Vette jerked and bogged, barely rolled into the gas station. I fill up, start her up, service engine light is on!!! F☆☆☆☆☆☆☆☆☆K!! I drove it about 50 miles, the light went off, scared the crap outta me!!! I hope your situation is manageable!

[@ReynoldsRides]

Thanks and congrats on the purchase.

[@phillymikea]

@@ReynoldsRides thanks! Please keep your videos coming 🙏

[@vettepurist304]

When light comes on when it’s cold it’s the computer checking that egr temp switch to make sure it’s not shorted to ground. Which yours is! It only does this check when cold! The fact that you unscrewed it where it threads in threw it off of its location, if you were to back it off a couple turns the light will go out and stay out. Or just replace it. It’s got a bi metallic strip in it that expands when the exhaust gas flows at a certain temp through the egr pipe then grounds the switch to let the computer know the egr gases are in fact flowing. Do not get rid of that egr system your computer is tuned to it and it will mess shit up on ya! Anyways go with the ZR1 it’s a super classic and the first of its kind and becoming a huge collectible. Super nostalgia

[@MrZdvy]

Better to read the codes first before starting to replace parts. It’s easy to do with a paperclip or piece of wire. A code number doesn’t tell you which part is defective but it gets you in the right direction. Also, I would have used wire seperators instead of tie wraps. Tying the spark plug wires close together like that may or may not get you a misfire.

[@ReynoldsRides]

Yeah I usually do pull codes first but, in this particular case, I felt like the circumstances were more telling than a code would have been. I pulled the code this morning and it is code 32 (EGR system error) which, to your point, doesn’t tell me much.

[@bernarddesanglois8690]

@@ReynoldsRides There are only 2 reasons for the ECM to set a code 32.... but the culprit is the same : the egr diagnostic switch. This switch is open (12volts) at start and idle. There's no EGR AT IDLE. When car is started and idling ECM checks if the switch is closed ( grounded) or open... if closed ECM throws code 32 : switch is stuck in closed position. Over certain conditions (cruising ) ECM will command the EGR vane to open in order to recycle the exhaust gaz to the intake via the the EGR pipe. The heat created inside that pipe will cause the switch to close (ground). Within 30 seconds the ECM will check if the diagnostic switch is grounded (read 0 volts) if not then ECM will set code 32. That switch is a basic copper blade which shape is changing according to the heat in the egr pipe. It can be adjusted by rotating the small threaded portion. Also... if the EGR solenoid is stuck open (EGR vane constantly open) then code 32 will appear when engine is at its operating temp.... hope it helps!!

[@scottsoltani3203]

If you have 50k buy them both. I love my 40th anniversary c4 6 speed. Corvettes are fun they are like street legal go carts. They look so cool and ride low.

[@ryanmitton]

as a c4zr1 (and multiple c4 base) and a c5 owner, i can say that the c4 zr1 is by far, far, far the better car in my opinion!

[@jayb3955]

ZR1 ALL DAY! according to car and driver the ZR1is only 2 tenths slower then the zo6 i think the 90 ZR1 is a very rare find i never see them for sale

[@rubyred93chev]

_The 1990 Corvette ZR1 is totally a different breed than an '04 ZO6. Ultimately, the fourth gen will be more valuable in the long run! That said, the last series of the fifth gen in the ZO6 model is a keeper as well. For me, I prefer the C4 over the C5._

[@bernarddesanglois8690]

Get rid of that EGR SENSOR.... and pipe.... there is a trick to foul the ECM when it commands the EGR valve to open thru the EGR Solenoid.... and later to check if the EGR switch is closed... if not.... SES Light turns on.

[@garethjones5733]

The newer car will probably be a better driving/owner experience in every way. But the older car will be better for channel content as there will always be things to replace or upgrade, much like your C4 now.

[@markfurchtenicht8274]

I own a C4 with only 38000 miles on it. The ZR1 would be a no brainer for me. Not a fan of the big ass end on the C5. But it’s your money and your choice. Good vid! 👍

[@palmermoe3303]

1. I would pick the ZR1 especially with it being in that sort of condition and year. 2. O2 sensor is much easier to do under the car. 3. idk if you have done a vid on pulling the codes but that would be good info especially since I have a check engine light that is always on no matter warm or cold, but the car doesn't seem to run worse than it did before the light magically started appearing.

[@bernarddesanglois8690]

C4... no hesitation!

[@terryholston872]

Let me know what you find out, Mine on my 86 has been on since I got it going in 2018 when I got it running after over 25 years of sitting in my neighbors driveway. runs fine otherwise, LOL

[@bartdaw6681]

I had the same problem with my 89 and it is the sensor.

[@pstreetgarage7304]

Nice job with the tie wraps. Looks good. I vote for the C4

[@silverstacker4170]

You should just pull the code and find out what the car is trying to tell you. C5 Z06 all day every day and this is coming from a guy that has way too much $$$ into my own C4. Z06 is probably already exceeding the performance of the ZR1 and the Z06 is just a cam and headers away from some incredible performance gains.

[@ReynoldsRides]

Yeah I usually do pull codes first but, in this particular case, I felt like the circumstances were more telling than a code would have been. I pulled the code this morning and it is code 32 (EGR system error) which doesn’t tell me much.

[@zragevii4705]

That c4 would be cool... I think that's the lt5? DOHC slightly smaller bore and slightly longer stroke.

[@mijares638]

I have an 89 with a fresh rebuilt motor. The service engine soon has been there because i have novegr valve so i onow theres nothing wrong with my engine. Hopefully its the same for yours specially if its rinning nice and strong.

[@arnaldoserrano2289]

Zr1 will be eventually more collectible, but ZO6 ,more modern reliability and more power, you can't go wrong with the LS6.

[@johnnycashh7148]

My next one will be a C6, just like the headlights on the front more than the C4 & 5.

[@dougcoleburn1579]

Z06 really looks nice! And I love a ZR1.

[@91_C4_FL]

My light comes on at sustained highway speeds for longer than 20mins. It’ll go away once I shut it off, and won’t return unless I drive that way again. All other gauges stay normal, but I should still probably get it diagnosed.

[@DeloreanGuy2]

did you ever figure out what it was?

[@austinkelly2807]

A zr1 is a much more remarkable car in my personal opinion. Everyone has a c5.

[@accept_everything_]

Have you ever replaced a fog lamp on your C4? I guess one of mine is broken and as it seems the whole front bumper needs to come of in order to reach it 😑...

[@ReynoldsRides]

I have not. That sounds terrible.

[@EthanCommins888]

I'd get a Cheap C5 and turn it into an autocross or HPDE car. You can find a C5 for under 10k. Still has an LS engine.

[@chadknutson5924]

On my 89 C4, the EGR temperature switch is showing about 4 threads above the white section. The white section on mine doesn't move, but the threaded piece easily rotates with finger pressure. I'd vote for you to get the ZR1 because they are more unusual. For me, I'd just keep tinkering with the C4 :)

[@ReynoldsRides]

Thanks for the info!

[@73makoshark]

@@ReynoldsRides But they're hard to get parts for. 😟

[@Outer_Nerd]

Both ZR1 and Z06 are cars I’ve been looking at, but I’m not buying a corvette until I finish my masters degree. If you are going to keep acquiring cars, I vote for the ZR1. The Z06 is new enough that you can pick one up a few years from now.

[@ReynoldsRides]

What masters degree are you working on and where?

[@Outer_Nerd]

@@ReynoldsRides An MBA from Grantham University. I’m doing the online project management MBA. They have pretty decent tuition especially for veterans.

[@ReynoldsRides]

Nice. Just curious. I have an MBA as well.

[@livefreeordie9519]

ZR-1 40th anniversary. There, I decided for you!

[@jwtig5574]

The C5 Z06 is definitely the way to go. Easier to maintain yourself due to it being an LS6 and parts availability . Yes I understand it is a C5’s and they are very common, but the power and mods available for the Z06 won’t break the bank while keeping the fun factor. Plus the technology, better suspension components. The ZR1 is amazing all in its own right, however, it would require special parts and tools, plus the ZF6 transmission is not the best. Good luck to you!

[@anthonyr829]

Go with the Z06! You already have a nice C4.

[@racer3212]

I’d snatch up that 90 ZR1 Fast!!

[@Mikes84Corvette]

When I replaced my O2 sensor I did it from underneath the car.

[@houseofno]

Go with the C5 Z06. Nothing against the C4 ZR-1 but that C5 Z06 is faster and far more refined, way more comfortable car.

[@patrickmorrison3316]

ZR1 wow

[@Tempestuous_Might]

I need the song that plays when you show the C5 for my retrowave playlist.

[@davidbauer1485]

ZR 1, more collectable over time. Get a junkier C5 and mod.

[@edwardepps1513]

I'd go for the ZR1, it's the first year design. I can literally count on 1 hand how many C4 ZR1's I've seen in person. Also will be a Collector's car some day.. And they only made approximately 5,000 C4 ZR1's. The C5 Z06's are far too common and will never get the acalades of the '90 ZR1. Even the C6 ZR1's aren't as special as this. GET THE ZR1

[@snafu4696]

1990 ZR1 is my favorite year because of it’s one year only body. It still had the sharp, angular nose and rub strips paired with the ZR1’s unique rear end. It also had a unique interior for the time as every Corvette before that had the interior your ‘89 does. That and the DOHC LT5 make it an easy choice. However, it’s overpriced imo. 1990 was the year they produced the most ZR1s and the most bright red ZR1s at that, so it’s not exactly ‘rare’. I’ve seen cars with 50-65k miles go for the teens depending on mileage and condition.

[@ReynoldsRides]

Great info, thanks.

[@bartdaw6681]

I had to replace mine as well.

[@kenkooldad8900]

ZR1 brother. That should be your pick.

[@ReynoldsRides]

kzbin.info/www/bejne/npaViISujNJ7jNE

[@mmahtnart8986]

Looks like you watched "Road Kill's" zip-tie moment

[@mreed2897]

Yes. You caused the error by screwing it in. Return to the original screw amount. P.S. you don't adjust the idle w the "idle screw" on the throttle linkage! Don't touch that screw! It ain't an idle adjust screw!

[@cw5865]

I have been fighting an intermittent Check Engine Light that is accompanied by rough running till it warms up fo over 20 years now... I suspected the EGR, but my occurs at warm engine. I await your findings and how are you getting codes as i don’t own a reader...

[@vildebill2000]

Did you find the issue? I have same problem

[@MrBobcone]

I vote ZR1

[@butch4365]

Did you check the code? If so, what was it? I have an 86 that will occasionally throw up a few EGR codes, but they go away after I shut the car off. Just curious.

[@ReynoldsRides]

I didn’t check the code at first because, to me, it was obvious what the issue was. I pulled the code this morning and it is code 32 (EGR system error) which doesn’t tell me much.

[@butch4365]

@@ReynoldsRides That's the code that I get as well, but mine seems to come up only after ive been doing around 70mph on the highway and the engine is already hot. Once I shut the car off, it goes away. Hasn't been back in a while, but then again it isn't a daily driver, so I'm not going to worry about it.

[@derekcannon8040]

Does the C4 ZR1 have a short throw shifter from the factory??

[@ReynoldsRides]

Are you asking because the shifter on the ZR1 in the video looks a little weird?

[@derekcannon8040]

@@ReynoldsRides guilty

[@dksvlogs6295]

C5 z06

[@ReynoldsRides]

kzbin.info/www/bejne/npaViISujNJ7jNE

[@novajoe67]

C5 Z06 for sure

[@ranbymonkeys2384]

I took the EGR completely out of my 85 and it doesn't trip the light

[@brianarnold2241]

Not sure what's going on with my 91 C4 . while driving the service engine soon Light comes on the off. I couldn't get anyone to read the codes because the light wouldn't stay on long enough. Last night I changed the EGR Valve tho king that may have been the problem but when I started it up today the Service engine soon light came as soon as I started up the engine and it stayed on. It also idled even rougher than before and seemed light it was going to stall. I called a friend who has a code reader but he could do it saying that my car was too old and that his code ready connection doesn't fit. At my wits end. Can anyone help.me???

[@ReynoldsRides]

You can read the codes yourself with a paper clip. There are Corvette forum posts that explain how. Read the code, make the fix, disconnect the negative battery cable to clear code(s), and then you should be good.

[@chrisbrzon3917]

Get the ZR1

[@christopheranderson1473]

The z06 all day

[@mmahtnart8986]

You must have jiggled it back in to position (-:

[@huntandride4026]

Z06!!!

[@rodneybradley8345]

I have a 1992 red Vette 50k original miles garage kept 2nd owner 15k anyone looking

[@chicosuave2966]

C5 👌

[@twentyonepizza3477]

c5!

[@NewEdgeDesigns]

U should go terminator cobra if ur spending 20k ..it’s going to appreciate much more and it’s a better more interesting car...

[@houseofno]

I disagree. That's an apples to oranges comparison. Terminator Cobras are extremely rare low production cars. We call those cars unicorns. On the other hand, C4 Corvettes are classic sports cars, plentiful, and fairly inexpensive to own and modify. That Cobra Terminator by comparison is a low production car and is virtually untouchable in terms of modifications to preserve its originality. The C4 is much more attractive. I love old Fords, I like that generation of Mustang. That being said, I consider the 99-03 Mustangs to be horribly unattractive and the 94 to 98 cars to be far better looking, esp the SVT Cobras.

[@NewEdgeDesigns]

@@houseofno none of what u said here has anything to do with reality, I actually dropped in I.Q. While reading ur comment...

[@houseofno]

@@NewEdgeDesigns Reality is that everything I said was true. I can comb my hair but that Terminator will still be a hideous automobile.