equalizer442
Active Member
- Joined
- Oct 23, 2002
- Messages
- 2,501
ive had this problem for quite some time and ive posted about it before but with no luck finding out the problem. my car has a "stumble" or miss some times when its cold, the scanmaster will read verry low o2 volts including 000 most of the time until the car gets warmed up and then it runs like a champ. this morning i caught out of the corner of my eye the stock boost gauge would flicker full boost for a split second every time it stumbled, my assumption is that the computers being tricked in to thinking that the car is at 15+ psi of boost and injecting fuel accordingly (as if wot) but at a low rpm and speed causing the stumble BUT that still dont account for the 000s on the scanmaster, that i think might becaused by a bad 02 sensor. im thinking that i might need a new MAP sencer (could this possably be the wastgeate selinod, what sences the psi of boost?) and a new 02 sensor. are my assumptions correct?