Low Compression Issue Resolved [Archive]

mazda lover

07-24-2010, 11:09 PM

Interesting read for you owners of the MS3

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1850830&page=1

starscream

07-24-2010, 11:29 PM

So as I understand it...

He got a compression tester, tested got low numbers but all within ~5psi of eachother. Did a wet test and got ~20psi higher. Then went through a bunch of diagnosing, and checking stuff out. Ended up borrowing another compression tester and then it read ~183psi and all the rest inbetween ~5psi. So bascially the compression tester he had was FUBAR? The surging could be turbo, MAF, a boost/vac leak?

mazda lover

07-25-2010, 12:24 AM

So as I understand it...

He got a compression tester, tested got low numbers but all within ~5psi of eachother. Did a wet test and got ~20psi higher. Then went through a bunch of diagnosing, and checking stuff out. Ended up borrowing another compression tester and then it read ~183psi and all the rest inbetween ~5psi. So bascially the compression tester he had was FUBAR? The surging could be turbo, MAF, a boost/vac leak?

you are correct sir, as Johnny Carson's side kick would say, a long read to get to a simple conclusion.