Compression numbers; not sure
08-28-2004, 05:18 PM
#1
Need help; not sure what's wrong cylinder 1 220 2 225
3 210
4 215
5 210
6 215
7 210
8 210
Thought for sure I had a broken valve spring, so I did the compression test. All seem within reason.
I pulled the valve covers, spark plugs, ignition fuse and fuel pump fuse. Opened the TB all the way.
Turned over the car 5 times for each cylinder; short bursts with a few seconds in between.
Should you do it with the rockers at normal torque or completely loose?
Symptoms: car shakes violently at any RPM over 2200rpm, logged misfires on cylinder #2 of 110 inside of 30 seconds and blew a P0300 code. I have tuning already, so it's not the misfire code from the cam; something doesn't feel right. Other ATAP info looked fine ( LTFT's, STFT's and O2's. )
What should I check next?
3 210
4 215
5 210
6 215
7 210
8 210
Thought for sure I had a broken valve spring, so I did the compression test. All seem within reason.
I pulled the valve covers, spark plugs, ignition fuse and fuel pump fuse. Opened the TB all the way.
Turned over the car 5 times for each cylinder; short bursts with a few seconds in between.
Should you do it with the rockers at normal torque or completely loose?
Symptoms: car shakes violently at any RPM over 2200rpm, logged misfires on cylinder #2 of 110 inside of 30 seconds and blew a P0300 code. I have tuning already, so it's not the misfire code from the cam; something doesn't feel right. Other ATAP info looked fine ( LTFT's, STFT's and O2's. )
What should I check next?
Last edited by Viper; 08-28-2004 at 10:25 PM.
