This is topic bad piston compression in forum Tech Talk at Northern California Ford Owners  .


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Posted by 92_chp (Member # 5574) on :
 
so i did a compression test on my 5.0 and four pistons came back with low compression..the car is supercharged. i think rod's and pistons are forged but not sure. do i need to rebuilt the motor???
 

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Posted by E's 89 COUPE (Member # 6569) on :
 
I BET YOUR HEAD GASKET ARE GONE CHECK IF THERE'S ANY WATER LEAKING INTO THE CYLINDERS
 

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Posted by 92_chp (Member # 5574) on :
 
i checked that already looks good...
 

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Posted by TOPnotch (Member # 1340) on :
 
5.0 + supercharger most likely a bad tune or no tune at all. Yeah sounds like a head gasket problem. Need more info on the car to help you out. Does the car run rough, is it down on power, run hot, use water?
 

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Posted by 92_chp (Member # 5574) on :
 
yeah the car run's like shit. their is no power.. think it might need a tune but i don't think that is going to help the low compression....
 

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Posted by smashin 5.0 (Member # 8301) on :
 
time for a rebuild
 

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Posted by 91CHP_Coupe (Member # 7686) on :
 
check the head gasket first because you said its only four on one side....
 

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