98 Explorer Searching for Idle
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Joined: Nov 2001
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From: Richmond USA
98 Explorer Searching for Idle
Problem: Truck wants to idle low 5-600 rpm but it won't maintain low idle speed. It constantly revs up only to quickly step back down to the lower rpm. Truck starts okay but will also try to ide down to fast and sometimes stall.
Check engine light is on but I think that is related to another issue with the battery cables.
Question: Is this an O2 sensor, or some other issue? If so is thier an easy test to find out?
Thanks in advance for any help..
Steve
Check engine light is on but I think that is related to another issue with the battery cables.
Question: Is this an O2 sensor, or some other issue? If so is thier an easy test to find out?
Thanks in advance for any help..
Steve
New User
Joined: Nov 2001
Posts: 20
Likes: 0
98 Explorer Searching for Idle
My 5.0 Explorer did the same thing on two different occasions.
Both times the outside temperature was about 60 and damp. The first time, the next day got colder and the idle was fine. The second time,
the temperature stayed the same for two days, and my truck would not idle above 500. The check engine light came on the second day of poor idling. It stayed on after driving almost 140 miles, idling normal. Thinking it had something to do with the low idle, I got on it very hard a couple of times. The second time, the check engine light when out.
I have always monitored the gas mileage, averaging 17-18 MPG per fillup on regular. After the check engine light scenario, I was only getting 15-16 MPG for three fill ups. For the next fillup, having already ordered a Diablo chip, I purchased 93 octane. I filled up again yesterday and got 19.4 MPG on that tank. I cannot explain it, but I hope the chip upgrade betters the most recent MPG.
Good Luck
Both times the outside temperature was about 60 and damp. The first time, the next day got colder and the idle was fine. The second time,
the temperature stayed the same for two days, and my truck would not idle above 500. The check engine light came on the second day of poor idling. It stayed on after driving almost 140 miles, idling normal. Thinking it had something to do with the low idle, I got on it very hard a couple of times. The second time, the check engine light when out.
I have always monitored the gas mileage, averaging 17-18 MPG per fillup on regular. After the check engine light scenario, I was only getting 15-16 MPG for three fill ups. For the next fillup, having already ordered a Diablo chip, I purchased 93 octane. I filled up again yesterday and got 19.4 MPG on that tank. I cannot explain it, but I hope the chip upgrade betters the most recent MPG.
Good Luck
