1990 Geo Prizm Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Geo Prizm

1990 Geo Prizm Problems

At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.

The engine mount on the passenger side of the car can wear out on cars with high mileage. This will put extra stress on the other mounts and the faulty mount will need to be replaced.

The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperature sensor it will trigger a Check Engine Light for improper EGR flow. The repair is to clean out the EGR passages and the EGR Temperature sensor. Our technicians tell this repair is pretty straight forward and takes about 1-1.5 hours. It is also wise to verify the EGR system components i.e. the Transducer, EGR Valve and VSV Solenoid at this time.

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1990 Geo Prizm Questions

Have looked and can not find which fuse it might be.

Where is the fuel relay fuse located at on a 90 Geo Prizm?

Have replaced fuel filter, fuel pump, distributor cap rotor, spark plugs and wires. The car has spark and fire but will not stay running. Do you have any suggestions please!

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1990 Geo Prizm Reviews

I have over 266,000 miles on this car. Very good car. Gets about 38 MPG. Will probably fix the car if it breaks since can't afford to buy another used car right now. Has manual transmission, no AC, heater takes awhile to heat up inside of car. Driver side front window doesn't work properly and probably can't be fixed since part needed now is obsolete but overall a GREAT car. So far, gets ...

I have only had this car for less than 2 years. I bought it with 137000 miles on it, and in the year and a half I have owned it, added 50,000 miles. The only real flaws I have noticed with it is that the AC doesn't cool down the car at all. It only cools down the person sitting right in front of it. My little prizm finally broke down a few weeks ago because of the master cylinder. I fixed it fo...

not a great car i got rid of mine for a mercury topaz

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