gsrroots

So, I purchased my 03 CLS 6MT about 3 years ago with this rough idle and low power. I figured one of the coils were bad because they car only had 94k miles on it and the seller stated it needed a tune up, dummy me. So, I replaced all the coils, timing belt and water pump job, spark plugs and all. seemed like the car was running better but the rough idle and lack of power was still there. I didn't really care much over time because I used the CL as a commuter car 3-4 times a week. I've put about 30k miles on it over the 3 year time frame and I really wanted to know what the issue was. After reading some other posts and given my car is a 6MT I assumed that maybe someone mis-shifted and bent valves so I did a compression test with the results posted below. Now that I have this issue with two of the cylinders generating low PSI I need some advice on what to do. Should I just replace the motor? Keep driving it like it is until something happens? Take the heads off and have them redone? What do you guys think? I priced the rebuild of the heads they quoted 650 without parts.

Should i take the chance and replace them with used bolt on heads or just replace the motor?

Any recommended shops in the dmv area?

Cylinder 1= 90psi
Cylinder 2=210psi
Cylinder 3=175psi
Cylinder 4=175psi
Cylinder 5=175psi
Cylinder 6=110psi

bks84

iTrader: (9)

Compression test shouldnt be the end all be all test to determine whats wrong.

You need to do a leak down test to determine if its valves or what thats causing the low #'s youre getting.

LOL, just realized thread is a month old.