Okay guys, for those of you with your P0300 misfire codes and this whole comotion about exhaust valve springs well here's the latest.
On friday a 23,000 mile 2005 Coly came into my job. Had a SES light on, P0300 code stored and was definately missfiring right in front of me. Service history showed the exhaust valve spring TSB had already been performed at 17k. So i checked dealerworld and found out a new Preliminary Information (PI) had me do a compression and leakdown test. Failed, number 1 cylinder intake valve was not shutting completely due to poor valve seat wear leaking 80% when it should be closed. PI says, "Replace cylinder head with updated hardened seats and all valve train." GREAT!
Now...... I was thinkin......... i get a P0300........ order up a head and right before i have it installed i send it out to get Ported and Polished. Hmmmmm
On friday a 23,000 mile 2005 Coly came into my job. Had a SES light on, P0300 code stored and was definately missfiring right in front of me. Service history showed the exhaust valve spring TSB had already been performed at 17k. So i checked dealerworld and found out a new Preliminary Information (PI) had me do a compression and leakdown test. Failed, number 1 cylinder intake valve was not shutting completely due to poor valve seat wear leaking 80% when it should be closed. PI says, "Replace cylinder head with updated hardened seats and all valve train." GREAT!
Now...... I was thinkin......... i get a P0300........ order up a head and right before i have it installed i send it out to get Ported and Polished. Hmmmmm