hey guys long time since ive been on here. so the last couple weeks my car has been running really rough its been missing a bunch, i put new plugs, new oil. i run 91 octane. also feels like my power went out the window. kinda sounds like my timeing chain tensionor is bad but not sure if thats what it is. i bought a compression test tool. but wondering if anyone had any insight for me also it has 100k

 

insight it could be lots of things do your test

 

Clean TB, Clean MAF, Check plug gap, stock is .035 i think.

 

Dont forget sc coupler (ticking)

 

Its an engine by the way

 

What kinda numvers should i see when i run the compression test.?

 

175-210

Some one correct me if im wrong.

 

It depends on if its a cold/warm dry/wet check and different gauges will have different readings, mainly u dont want more then 10 to 15% difference from the highest to lowest piston.

 

Also depends on elevation. GM says as long as its over 100 and each piston is within 10-15% of eachother its ok. others say thats wrong. I can never find a definite answer lol. but you really dont want anything under 100

 

Ill have to check my gm service manual Wen i get home.

A leak down test would be good also