My 1998 gmc sonoma is poping out the intake an the ex? It runs badthe codes are po300/po155/po102 help?
Sunday, December 12th, 2010 AT 10:02 PM
1 Reply
HMAC300
MECHANIC
48,601 POSTS
They are all related to your popping problem. You have either thrown a pushrod/ bent a valve or punched a hole in the rocker arm. It needs to belooked at by a pro. You could have also burnt avavle aswell. That 's why it's poppping.