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Discussion Starter · #1 ·
TSRM states when doing a compression check to disconnect the camshaft position sensors? Is this absolutely necessary I saw somewhere where you could also pull out both the EFI fuses. Anyone?
 

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Discussion Starter · #3 ·
Pull the EFI fuses and all the plugs and crank it over? Anything else, make sure the car has reached operating temp.
 

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Supranian
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Pull the EFI fuses and all the plugs and crank it over? Anything else, make sure the car has reached operating temp.
...and hold the throttle body open.
 

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Crank until the gauge reaches peak psi and doesn't climb anymore. And don't forget WOT.
what gauge are you talking about....oil pressure???? what if you dont have one?
 

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I was talking about the air psi gauge on the compression tester. :)
Duuhhh....Thats what i tought but i had to ask...cuz im about to perform a comp..check on mine as well.
 

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after you record all 6 numbers pour a small amount of engine oil inside the engine and see if your compression rises. that will tell you if you have worn piston rings.

do you know how to do a running compression test ? that can tell you alot of info as well if your motor has low compression etc etc.
 

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I've never done it before......Ill have some1 help me who did it before....or maybe just have a shop do it..
 

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Boost4fun
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whats a running compression test and how do you perform that?
The only "running compression test" I know of is being done at diesel engines. There the glow plugs will be removed and the compression gauge is being placed in there..
But where did you heard of that at gas engines? :dunno:
 

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T88 YOU
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oil in the cylinder doesnt work as well with a compression test as it does with a leakdown, oil will change little to nothing at all with a compression test.
 
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