C4 Corvette High Rev Problem
Thread Starter
Intermediate
Joined: Dec 2021
Posts: 38
Likes: 3
From: 10950
C4 Corvette High Rev Problem
I bought a 1984 C4 couple months ago with only 30 thousand miles on it. Now it's finally starting to get nice outside to work on it. I noticed when I bought it that the car has a very high rev about 3000 Rpms in idle and when put in gear it's still roughly around 2000 Rpms. I was wondering what could cause this problem and if I should fix this problem just so the car runs well (diagnose the problem) before I do the work on the car. I would like to tear down the whole motor and put all new gaskets seals and a bigger camshaft. Should I fix the Rpm problem first before taking it completely apart or is it something I could fix as I put the motor back together.? Thank you for your replies
PS, What I Want To Do To This Car..
I want to basically rebuild the whole motor maybe add a new exhaust and headers. Port the Intake manifold remove the smog pump remove the Ac Pump remove the condenser. Maybe one day at the end of the year add a turbo small turbo (not sure yet maybe not) I'm going to change all the wires plug hoses I really want this thing to look nice. I bought the car for 3k. Everything on the interior works perfect maybe put new film on the speedo and Led bulbs to make it brighter I already bought a brand new complete carpet set for the car. New Rims and Tires, I am going to re due the seats my self they are in pretty good shape for being how old it is. I am looking to put about 5 grand into it this project. I am a professional Auto Body Technician and I am going to put a new paint job on it also.
PS, What I Want To Do To This Car..
I want to basically rebuild the whole motor maybe add a new exhaust and headers. Port the Intake manifold remove the smog pump remove the Ac Pump remove the condenser. Maybe one day at the end of the year add a turbo small turbo (not sure yet maybe not) I'm going to change all the wires plug hoses I really want this thing to look nice. I bought the car for 3k. Everything on the interior works perfect maybe put new film on the speedo and Led bulbs to make it brighter I already bought a brand new complete carpet set for the car. New Rims and Tires, I am going to re due the seats my self they are in pretty good shape for being how old it is. I am looking to put about 5 grand into it this project. I am a professional Auto Body Technician and I am going to put a new paint job on it also.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
If the engine was revving at 3000rpms and you put it in gear, you would chirp the tires every time. I think 2000 rpms is near the stall speed of the stock converter so you must be really on the brakes. Check to make sure your tach is accurate.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
