2002 Ford Focus Focus rough idle and popping sound when acc

2002 FORD FOCUS
126,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
BMOCBARKER
  • MEMBER
  • 1 POST
My car runs very rough at idle, worse when in gear and when it is cold outside. There is no check engine light on. I have replaced the MAF sensor and had vacuum leaks checked.

There is also a popping sound coming from the engine when under light acceleration and sometimes at idle.

What is the problem? Could it be a stuck valve?
Oct 12, 2009 at 10:32 AM
Advertisement
Avatar
DOCFIXIT
  • CERTIFIED EXPERT
  • 18,828 POSTS
Hi maybe valve related. Have compression checked post results will advise. any check engine light?
Thanks for donate
Oct 12, 2009 at 3:47 PM