Question about 1991 Volkswagen Passat
Be sure to test your radiator fan. You can start up your car car and
let it idle until the engine reaches normal operating temperature, and
that should cause your fan to come on. If your fan does not come on
even as it starts to overheat, then you should replace your cooling
fan. It is possible your radiator is clogged and the water is not
being cooled properly. If you do replace your radiator, be sure you
replace your upper and lower radiator hoses as well to be safe. If not
even that helps, the only other thing I can think of would be your
water pump. If you've never replaced that before, it would be a good
idea to replace it. There really isn't that much to your cooling
system, and it sounds like you've already replaced some of the most
common causes for this problem. You can even try to use a coolant mix
with more water rather than anti-freeze; like 70% water and 30%
Since your check engine light is on now, you can have your car's computer scanned for codes. If you have an AutoZone in your area, they can check your car's computer for free. Just go in and say your check engine light is on, and they will check it for you. It's quick and free, and you'll probably get some information as to why your car is bucking. You can also take your car to the dealership to have them scan your car's computer for the trouble codes, but they will charge around $80 just to read the codes.
It may be possible the bucking problem and the overheating is related, but I doubt it. Your first course of action now should be to find out what codes your car's computer is throwing to cause the check engine light to be on. At least you'll be one step closer to fixing that issue.
Posted on Jul 02, 2008
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Posted on Jan 02, 2017
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