1990 Volkswagen Jetta Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Volkswagen Jetta
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1990 Volkswagen Jetta ProblemsHigh Mileage Automatic Transmissions May Have Shifting Problems
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.
Reverse gear failures and noise in the manual transmission models are common.
Electrical issues that are difficult to diagnose—and sometimes intermittent—are typically due to ground wiring issues. The most troublesome ground locations are under the battery or at the engine.
1990 Volkswagen Jetta QuestionsWhat does it mean when a 1985 VW Jetta has a hard time turning on? (1 answer)
(I know I put 1990, but it IS a 1985. It would not let me go past 1990.) When the car is cold, it has some issues turning on for some reason. I don't know what it could be, I'm no car specialist. It's not the battery because that was already replaced. Any ideas?
I have replaced all temp pickups and fan switch, thermostat (drilled 3mm holes X2), have replaced the reservoir tank.
While thermostat cap was off, checked impeller, used torch and screwdriver to c if impeller is broken or loose (100%). NOT loosing water, no oil in water, no vapor out of exhaust...
backfiring also the idle has dropped down to wear the engine will die out when idling.whats wrong.....