Misfire code, car shaking a little

DANA ALMOKDAD

MEMBER
2008 MINI COOPER S
1.8L
4 CYL
2WD
AUTOMATIC
130,000 MILES

Cylinder four compression is 70.
All other cylinders between 90-95.
The car misfiring after head gasket job.
Timing chain kit has been replaced.
There is a tiny space between the camp exhaust locking tool and the camp intake.

2 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

It looks to me like compression is low in all four cylinders. I have included a compression pressure chart for your vehicle down below in the diagrams. Your vehicle should have between 130 - 195 PSI in all cylinders. As a general rule of thumb, compression in lowest cylinder shouldn't be less than 10% of the highest cylinder. I have also included a link for you down below. Please go through all the information and get back to us with what you find out.

https://www.2carpros.com/articles/the-reasons-for-low-compression

Thanks,
Alex
2CarPros

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Sunday, March 3rd, 2019 AT 10:43 PM

JIS001

MECHANIC
3,411 POSTS

I agree. All cylinders read really low? Where did you get your compression guage from? Also, can you provide the exact codes? With those readings I am surprise your vehicle even started? Let us know please.

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Sunday, March 3rd, 2019 AT 11:01 PM