chiefwhw
New Member
- Joined
- March 1, 2011
- Messages
- 2
- Reaction score
- 0
- City, State
- Harlan, KY
- Year, Model & Trim Level
- 2001 Sport Trac
Hey guys, Thanks for the site. Now my question.
I have a 2001 Sport Trac with 167,000 miles on the SOHC 4.0. I believe that it is a Job#2 Explorer. Build date is 9/00. I have a problem with a "loping idle" when in park or sitting at a red light or drive thru. Also, if I make a fast stop, the idle drops and the vehicle lurches. On cold start, the truck idles up to ~1000-1100 rpms. As it gets warm it drops to around 500. Then the idling issue begins. It starts loping and droping to 300 rpm or so and it sounds like there is a little monkey in the air cleaner box banging on a bongo drum 3 or four times as thumps are heard, then it goes back up. Seconds later, you it drops and the monkey is back. Doesn't seem to affect the driveability of the rig, runs pretty good, however, the fuel economy sucks and she does seem a little hesitant at times when pulling out from a stop. Transmissions seems to shift well (original tranny!). A few weeks ago, I had a CEL on and read the codes, there were two: P0171-System Too Lean, Bank 1 and P0442-EVAP Emmission Control System Leak (Small). I put some rubber treament on the fuel cap seal and placed it on the truck and now there is no CEL, but still have the rough idle. Used Lucas Fuel treatment with no luck. I did take the IAC off and clean it (a lot of carbon). Improved the hesitation some ,it seems, but still the rough idle. Checked the Air Filter and it is OK. Any suggestions would be greatly appreciated for this Fellow Exploder Owner...TIA
I have a 2001 Sport Trac with 167,000 miles on the SOHC 4.0. I believe that it is a Job#2 Explorer. Build date is 9/00. I have a problem with a "loping idle" when in park or sitting at a red light or drive thru. Also, if I make a fast stop, the idle drops and the vehicle lurches. On cold start, the truck idles up to ~1000-1100 rpms. As it gets warm it drops to around 500. Then the idling issue begins. It starts loping and droping to 300 rpm or so and it sounds like there is a little monkey in the air cleaner box banging on a bongo drum 3 or four times as thumps are heard, then it goes back up. Seconds later, you it drops and the monkey is back. Doesn't seem to affect the driveability of the rig, runs pretty good, however, the fuel economy sucks and she does seem a little hesitant at times when pulling out from a stop. Transmissions seems to shift well (original tranny!). A few weeks ago, I had a CEL on and read the codes, there were two: P0171-System Too Lean, Bank 1 and P0442-EVAP Emmission Control System Leak (Small). I put some rubber treament on the fuel cap seal and placed it on the truck and now there is no CEL, but still have the rough idle. Used Lucas Fuel treatment with no luck. I did take the IAC off and clean it (a lot of carbon). Improved the hesitation some ,it seems, but still the rough idle. Checked the Air Filter and it is OK. Any suggestions would be greatly appreciated for this Fellow Exploder Owner...TIA