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tpulliam79 · 10-22-2008, 10:11 AM

not sure of the compression and I was told by my mechanic that the vales arent adjustable
( I dont believe him) how would I go about compression and leak down testing myself? my EX-mechanic even told me that my truck has more power than a stock 91 tbi because of the cam differance but says thats why the vacuum is off the short block and cam have just over 30000 miles on them so they shouldnt be worn out.
I am putting in a new radiator today and was thinking of replacing the distributor as the top under the rotor is very rusty and seems to have a good amount of play, is thhis normal?
I can fix just about anything once I know whats wrong but am a complete newb when it comes to diagnosis and testing. also if I do put a new distributor in how do I go about getting it lined up right, I have no timing light but I know its timed now?

10-22-2008, 10:11 AM	#70
tpulliam79 Registered User Join Date: Sep 2008 Location: spokane valley, wa Age: 29 Posts: 283	Re: 1991 chevy 1500 5.7 tbi erratic idle not sure of the compression and I was told by my mechanic that the vales arent adjustable ( I dont believe him) how would I go about compression and leak down testing myself? my EX-mechanic even told me that my truck has more power than a stock 91 tbi because of the cam differance but says thats why the vacuum is off the short block and cam have just over 30000 miles on them so they shouldnt be worn out. I am putting in a new radiator today and was thinking of replacing the distributor as the top under the rotor is very rusty and seems to have a good amount of play, is thhis normal? I can fix just about anything once I know whats wrong but am a complete newb when it comes to diagnosis and testing. also if I do put a new distributor in how do I go about getting it lined up right, I have no timing light but I know its timed now? __________________ 1991 chevy 1500 ext. cab 5.7 TBI 1988 chevy reg. cab 5.7 TBI lifted 8" swampers ( GONE Wife made me sell it )