20 Most Recent
1990 Chevrolet Corvette Questions & Answers
1990 corvette pdf owners man
https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Corvette/1990-Chevrolet-Corvette.pdf
I have a 1999 corvette
Which is it ?????
Question about 1990 Chevrolet Corvette
Open Question
I have a 1999 corvette coupe
Engine surges only after it warms up!
It sounds like an intake manifold vac leak. After the engine warms up use a can of spray carb cleaner at all edges of the intake. Use short bursts of the cleaner and see if the RPM changes. If it does you have a vac leak. That means replacing manifold gaskets.
1990 Corvette
This may be related to the antitheft system. The system is known for turning off the starter and/or injectors when it fails. Normally when the injectors are turned off, the car will run for a second or two, and then stall. When it's the security locked out starter, you won't even hear a click when you turn the key. Is there a light on the dash that says SECURITY or a picture of a car with a lock through it? This is a common problem worth looking into. http://www.diy-gm-security.com/
Power to the fuel pump
If you have tested for voltage at the pump wiring and find none, remember the ECU may not supply pump current if it finds signals missing from critical sensors. There is also an inertia switch in the circuit I think.
Heater blower motor runs without the key on
Replace the relay or resistor first. Relays can stick closed, will cause a fast blower. Resistors can be fast to slower speeds. After that is burnt wires somewhere. Personally , I look at the wires first, Check them for ground shorts and impedance. Have an Ohm/volt meter?
1990 corvette engine races and takes off when brake pedal is depressed. Happen in drive and reverse. Getting scary.
Hi Jackie , It doesn't have to have a code stored in the ECM memory for a problem too exist . need some more info from your if you would like some ideas as to the problem !
What engine does yours have ? 5.7L ? What type fuel system does it have - TBI - throttle body fuel injection ? I had vehicles at the Chevy dealer I worked at with this type fuel injection , where the engine raced really fast . Vacuum leaks , bad plug wires can cause this problem . The engine computer is compensating for more air entering the engine ! After fixing the problem it still was racing , you have to drive the vehicle an get the speed up over 35 MPH for the ECM to reset !
What transmission is in a 1990 corvette?I think it
No there are different 700R4 transmission, well that not quite true. The 700R4 had many jobs to matted to Corvettes to SUVs, the internals are where the differences were in the 700R4 such as the servo's and boost valve which can be easily replaced. Best thing to do is to got to a Transmission shop that can build a transmissions for your Corvette or buy a replacement 700R4 for your year of Corvette. That is why the shift points and firmness are different in a Corvette then a Cadillac while they both have 700R4 in the 1990's. Be bad for a Corvette to shift like Grandma's Cadillac going to play dingo. Good luck and hope this helps.
Not finding what you are looking for?