Compression Test Results... OK?

[dashtz69]

First I would like to thank Xceler8n for trying to help me through this. I finally got it all figured out. Well here are my results...
From left to right
1- 190-190
2-185-190
3-180-185
4-155-160

I did each cylinder twice. The fourth one is little low, very close to that 15% serviceable limit... That plug looked the worst too when I pulled it out. Had black all over it. However, my Chiltons manual says that if your plugs are too cold (BPR7ES) it can foul quickly. So I am going to put 6es in there and see if that will help. I still can't believe those numbers are that high though. I didn't think they were that high stock. This was done with the car full warmed. Something seems wrong though... 1995 Talon TSi with 123K miles...

 

[KPWSerpiente]

Your first three numbers are good. The fourth one is bad. Check them again in a day or two, and if you get similar results do a leakdown test on the fourth one. It might be a bad ring.

-T

 

[xcelr8n]

hey no problem man, the 4th one may be bad becuase of youre battery!
my last number was lower than the rest, went back out went for a spin, and then bam right where it should be, give it a shot.
since 7 shots at a test would drain youre battery

 

[dashtz69]

Thats what I was hoping. Plus the car was cooling down a little too. I don't know though, because that plug looked like crap. We'll see... I'll check it tomorrow or Friday. Thanks