Engine Performance problem
1998 Subaru Forester 4 cyl All Wheel Drive Automatic 116k miles
car has a cold hesitaion" stuck in the mud' feeling at 1800-2000rpm. after trying many things to fix problem, finallly got a lead, removed and plugged vacuum line from egr and hesitaion has dissapeared. so the vlave seemed to open and close properly, used a vac pump and it holds vacuum, now my service manual says when checking egr that it should open around 1/8 inch and it seems mine opens about a 1/4 inch, which maybe could be why it hesitates. but i am wondering why it is opening too far, could it be a weak spring. this car also has a vac modulator do-dad with two lines in off two different ports on throttle body and another that runs through a solenoid valve to egr and another port on bottom that i believe reads exhaust backpressure. any ideas where to start, these parts aren't cheap so trying not to make any guesses
1998 Subaru Forester 4 cyl All Wheel Drive Automatic 116k miles
car has a cold hesitaion" stuck in the mud' feeling at 1800-2000rpm. after trying many things to fix problem, finallly got a lead, removed and plugged vacuum line from egr and hesitaion has dissapeared. so the vlave seemed to open and close properly, used a vac pump and it holds vacuum, now my service manual says when checking egr that it should open around 1/8 inch and it seems mine opens about a 1/4 inch, which maybe could be why it hesitates. but i am wondering why it is opening too far, could it be a weak spring. this car also has a vac modulator do-dad with two lines in off two different ports on throttle body and another that runs through a solenoid valve to egr and another port on bottom that i believe reads exhaust backpressure. any ideas where to start, these parts aren't cheap so trying not to make any guesses
Feb 27, 2010 at 12:13 AM