SVO LOU
Well-Known Member
- Joined
- September 20, 2002
- Messages
- 128
- Reaction score
- 0
- City, State
- Greenville, SC
- Year, Model & Trim Level
- 97 Mountaineer AWD
Guys,
Have a 97 Mounty w/82k. Went to go out last night but it was hard to start. When it finally did, it was idling really low, probably less than 600rpm and sounded like it had a miss. Tried to rev it in park and it hardly got over 1000 rpm and it backfired through the intake sometimes. It defintely won't move and no CEL/codes.
Today it had the same symptoms BUT if I unplugged the MAF sensor it would rev to 4-5K no problem and I couldn't detect a miss. Fuel pressure was at 35 psi at idle and all wires have a spark.
After that I changed the plugs, fuel filter, cleaned the MAF and IAC valve, checked (unplugging/replugging) the coil pack connectors and 1 O2 sensor conn., and disconnected the battery for 20 minutes. I changed the plugs and wires about a year and half ago, wires still "looked" good (no obvious burn marks).
Here's the kicker, in my eyes anyway...This just happened over night (literally). Wires usually offer decreasing performance. Fuel pump and sensors usually go out like this BUT I have fuel pressure and no CEL.
Any ideas?
Thanks.
Lou.
Have a 97 Mounty w/82k. Went to go out last night but it was hard to start. When it finally did, it was idling really low, probably less than 600rpm and sounded like it had a miss. Tried to rev it in park and it hardly got over 1000 rpm and it backfired through the intake sometimes. It defintely won't move and no CEL/codes.
Today it had the same symptoms BUT if I unplugged the MAF sensor it would rev to 4-5K no problem and I couldn't detect a miss. Fuel pressure was at 35 psi at idle and all wires have a spark.
After that I changed the plugs, fuel filter, cleaned the MAF and IAC valve, checked (unplugging/replugging) the coil pack connectors and 1 O2 sensor conn., and disconnected the battery for 20 minutes. I changed the plugs and wires about a year and half ago, wires still "looked" good (no obvious burn marks).
Here's the kicker, in my eyes anyway...This just happened over night (literally). Wires usually offer decreasing performance. Fuel pump and sensors usually go out like this BUT I have fuel pressure and no CEL.
Any ideas?
Thanks.
Lou.