r/c4corvette

Air intake/filter options?

When I bought my ‘94 a couple of years ago, I thought it was cool that it had an SLP Tri-Flow air intake. Now however, that I’ve found out that this product is discontinued, was wondering if anyone has suggestions on what air filters I can use as a replacement, or should I convert back to the stock air intake?

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u/Adventurous-Key968 — 17 hours ago

What replacement fuel pump are you guys using?

I need to replace the fuel pump and have the whole module from AC Delco minus the pump. But I can't seem to find a fuel pump anywhere. Everyone I find is plagued with horrible reviews.

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u/Txstrength — 2 days ago

Help‼️

I recently replaced the valve stem seals in my 1985 corvette. It took a few days to get the project totally done and then once I started it up I began hearing this sound. Initially I thought i may have incorrectly adjusted my rockers but after re adjusting the sound is still here. I ran the car without the valve covers on to see if I could find a rocker making the noise (hence the oil everywhere and light smoking) and it did not sound like it was coming from the valve train. I’ve pushed and pulled on many things and listened with a stethoscope to try and find the noise but I just can’t pin point it. Hoping someone may have some ideas. Thanks all. Let’s hope it’s nothing major!

u/SmallAd5972 — 1 day ago

My 1984

Bought this in April, been my dream car since I was 14, now 39!

Has electrical gremlins, specifically the alarm, currently trying to figure it out.

When the fuse is installed the horn will sound and the light will come on the dash while starting then silence again... Anyone has any ideas ?

u/Ingo_Schwartz — 2 days ago

Can anyone please tell me is this engine original for a 1995 Corvette c4 lt1 base coupe v8 thank you or is it a supercharger

u/Future_Potential2789 — 2 days ago

Can anyone please tell me is this engine original for a 1995 Corvette c4 lt1 base coupe v8 thank you or is it a supercharger

u/Future_Potential2789 — 2 days ago

84 corvette efi swap

I’m looking to swap cfi to tbi, I know I’m going to have to get a kit such as the Holley sniper or aces efi system and run new fuel lines from a higher pressure pump in the tank with a regulator and filter. I know I will need a low profile intake for it to all fit under the hood. Also aware that I will need a bracket for the TV cable to the trans. Plan on replacing the distributor with a better unit since mine is still original. Just curious if I’m missing anything. Curious if anyone has done this and how it went and anything I need to know. I know cfi lovers will respond and call me a sinner.

u/Specialist-Share1605 — 3 days ago

I’m having a tiny bit of a rough idle in my 94’

I’ve been having an extremely slight rough idle cabin is a little shakey nothing alarming. No lights on the dash. I’m a new owner and likely over paranoid just don’t know if it’s normal. I know when I bought it I’d be working on it. One time I did turn it on and it bounced 200-300 rpm a couple times then recovered. Looking for any pointers would be appreciated.

u/phantomaphid — 3 days ago

Electrical problems on my C4 driving me crazy

Hello everyone, I have a 1987 Corvette with an L98 which I’ve refreshed recently, added a new paint job, resurfaced heads, head gaskets, etc, It’s completely redone

Now that I’m done engine-wise, I’m getting her ready to hit the road. But now, the other problems that have been lingering are starting to come up.

One of which being my dash cluster. The RPM screen lights up when I turn the key to “ON” but then dies and shows nothing at all. I checked my distributor and the TACH wire is attached, but I realized the tach filter wasnt grounded, so I grounded it to the rear of the head on the passenger side, should be good now, but still the same result. RPM’s don’t show. I think it might be the actual wire going into the distributor that might be bad so I’ll have to test it.

And now ontop of that, my oil pressure reads “LO” nonstop. It doesn’t change or go up. Should be an easy fix, I bent one of the prongs on the pressure sensor but bent it back to place and thought it’d be okay, I guess it wasn’t..

And the 3rd problem would what I assume to be either the O2 Sensor, IAC valve or the TPI sensor. The RPM’s on my engine after about 2 seconds of being on goes significant up, how much, I couldn’t tell you. ( rpm’s not showing ) But it is very noticeable. I did some tests, and after removing the IAC valve the engine no longer surged and ran actually, pretty good

So most likely a bad IAC, but I’ve also heard that after adding an IAC you need to do some sort of reset? I don’t know the specifics but I’ll have to look more into it

And the icing to the very disgusting cake is my dash cluster, again. Some of the numbers like the coolant temp are just completely indistinguishable. You can’t read what it says, some of the sticks in the numbers aren’t showing, I’ve found that pressing the screen a bit helps kinda see it but not really. And the screen on my RPM’s is completely cracked but still lights up. And that’s about it…

A nice long list of problems. Oh, and I forgot to add that since I painted the engine block it’s smoking all around while it bakes, which adds to the fear. But yeah, if anyone would be able to point me in the right direction or give any advice on anything here It would be extremely appreciated. It’s been very frustrating and I’m just really hoping it isn’t as bad as Im making it out to be. I know it was allot, so if you did, thank you for reading! Have a great day!

TLDR; Engine surges shortly after startup, RPM’s not showing on dash, oil pressure constantly on “LO” and numbers not being displayed clearly on dash.

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u/Tiny_Ad3757 — 3 days ago
▲ 2 r/c4corvette+1 crossposts

Is this a good service history? 1996 Corvette

Opti replaced recently... otherwise all look good?

u/jimmiesjohnson48 — 3 days ago

Battery Recommendation(s) for ‘86 Corvette?

As Title Implies (Not Utilizing the Wally-World Warranty). Pic(s) of Replaced Battery

u/PAGSDIII — 3 days ago

1992 LT1 - Intermittent hissing sound when turned off

Any idea what this intermittent hissing sound is? It occurs about every 25 seconds after the car is turned off, and is coming from down low on the passenger side.

The car is also having the weird issue where it will start and then immediately die. You have to start it and as soon as it cranks, rev the engine to get it to stay on otherwise it will die. It doesn't do it every time, usually after I've taken it out already and stopped somewhere, when I go to restart it then it will do it. The battery voltage is good so it seems to be something else. Vacuum leak maybe?

u/RaptorHunter182 — 3 days ago

Pretty good C4 turnout at cars and coffee this morning.

Ran out of time to get a decent picture of my own car (last pic is the only one I took).

u/Shadowcat205 — 4 days ago

How quiet can I expect an ‘85 to be?

Car is currently running very well. The suspension is up next and then it’s the interior. It has all the issues you’d expect from a 192,000 ‘85, but since it was a daily driver for so long there was a lot done over the years, AC is 134 and the seats are in great shape so I’m optimistic that after fuel, braking, cooling and now suspension that working my way through the switches, motors, carpet, panels and audio is likely to get me something I genuinely enjoy driving,

But after contemplating all the 40 year old plastic on the interior I’m starting to question whether chasing all the squeaks and rattles is a rabbit hole I ever come back from.

Anyone gone down that path?

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u/ellufeyeno — 3 days ago

Did the 86' L98 came with rollers or flat tappet?

Looking forward to cam my vette but I can't seem to find any information on the engine do you have a way of knowing that or do I need to find casting numbers somewhere ? Plz help

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u/Sufficient-Court5186 — 3 days ago