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I'm not sure about your situation, but I had a car that overheated. Part of the repair process was to machine the heads, which had warped from the heat. Doing this caused an increase in compression due to a smaller combustion chamber volume. After the repair, I had to use premium fuel, otherwise the car would knock severely. Perhaps your car had some previous engine work? Hope this helps...
What else can I help you with?
Why would 1989 Z24 run really bad on reg gas but ok on premium gas?
Your fuel injectors are dirty. Put in some good fuel injector cleaner with a full tank of super.
Does the z24 cavalier have a v6?
Yes, I have a 1988 and 1989 Chevy Cavalier Z24 and they both have the 2.8L V6
What is the bolt pattern on a 1989 cavalier z24?
5x100
What is the horsepower of a 1989 Chevy Cavalier Z24?
it has 125hp
Where to buy a complete wiring harness for a 1989 Z24 convertable with auto?
the dealer or a salvage yard are the only two places i know of
What is the firing order for a 1989 Chevrolet Cavalier Z24?
1-6-5-4-3-2- good luck ....chevy boy
How much horse power does a 1989 z24 with 3.1 have?
135-145hp
What is the top speed of a 1989 z24?
25 miles per hour
Can you flat tow your 1989 Z24 Cavalier?
Yes, you're able to.
What size is the 1989 z24 fuel tank?
Right at 14 gallons
What is the correct Spark plug setting on a 1989 Z24 engine?
.045
Will an engine from a 1987 Z24 Cavalier automatic work in a 1989 Z24 Cavalier V6 stick?
Yes. They are the same from 1987 until 1990
