Originally Posted by hachacker5024
i need to know the compression (PSI) for a 91' 1.8L LS with 124,000mi on it
Don't understand your question??
U test your OWN compression with a guage...
There's no way to tell the compression on an engine with 124,000 miles unless u check it yourself...
U can find out what the compression should be when your engine is new, look in a haynes or chilton...
Or are u asking what the Compression RATIO is? if so, it's not rate in PSI.