1990 Geo Prizm Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Geo Prizm
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1990 Geo Prizm ProblemsCheck Engine Light Due to Restricted EGR System
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.
You may be able to prevent automatic transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned, the transmission system should be completely flushed.
The ignition coil inside the distributor may fail. Our technicians tell us this may result in a hesitation on acceleration, especially when the vehicle is warming up on cold, rainy days. The pickup coils inside the distributor can also fail and cause a no-start condition. There have also been some failures of the radio noise suppressors inside the distributors, which can short out. Our technicians recommend replacing the whole distributor with a complete, genuine Toyota distributor if any of its components fail.
1990 Geo Prizm QuestionsThe new front motor mount is mounted but won't line up with the hole to put the bolt through..what should I do? (1 answer)
my engine lite comes on and stays on for a few daze the off again. very intemittant. can not get a code reading when it not on..Ifigure EGR. is that the device on the top of the engine that has an 'adjustment valve' on it ???
appreciate the help.. the service manuals I have are only the ...
The car turns over and runs great as long as I feed it starter fluid. I can hear the fuel pump priming so I disconnected the fuel line from the fuel rail and watched a good flow of fuel coming out while I was cranking the engine. With the key in the on position, I put a test light through the yel...