1992 explorer idling problems
New User
Joined: Oct 2002
Posts: 4
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1992 explorer idling problems
[updated:LAST EDITED ON 31-Oct-02 AT 07:35 PM (EST)]Hello,
I hope someone out there can help me. My 92 explorer failed nj emissions for hc & co. My trouble code identified the oxygen sensor to be the problem. I changed the sensor , reset the computer & still have the same problem. You can smell the emissions and my idle is not steady it goes from 500 rpm to 1000 rpm back to 500 to 1000 and so on and so on. Can anyone give me a suggestion? This is driving me crazy.
Thanks
I hope someone out there can help me. My 92 explorer failed nj emissions for hc & co. My trouble code identified the oxygen sensor to be the problem. I changed the sensor , reset the computer & still have the same problem. You can smell the emissions and my idle is not steady it goes from 500 rpm to 1000 rpm back to 500 to 1000 and so on and so on. Can anyone give me a suggestion? This is driving me crazy.
Thanks
Posting Guru
Joined: May 2002
Posts: 2,450
Likes: 2
From: Baltimore
1992 explorer idling problems
Did you pull the codes again after you reset the computer?? It sounds like it could be the TPS(throttle position sensor) or the IAC (idle air control) soleniod. Also, when you pulled the codes the first time did anything else come up other than the O2 sensor??
New User
Joined: Oct 2002
Posts: 4
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1992 explorer idling problems
[updated:LAST EDITED ON 31-Oct-02 AT 09:40 PM (EST)]I did pull the codes again. It was 111 which I beleive is all clear.
Am I missing something? I just went for a drive and it is worse than ever. When at operating temp. and in park or nuetral it almost goes to a stall then back to 1000 rpm consistently. I appreciate your help with this problem. Oh, when I pulled the codes the first time the only trouble code indicated was for the o2 sensor rich condition. I think there is only 1 sensor on this vehicle. Is that correct?
Am I missing something? I just went for a drive and it is worse than ever. When at operating temp. and in park or nuetral it almost goes to a stall then back to 1000 rpm consistently. I appreciate your help with this problem. Oh, when I pulled the codes the first time the only trouble code indicated was for the o2 sensor rich condition. I think there is only 1 sensor on this vehicle. Is that correct?
Posting Guru
Joined: May 2002
Posts: 2,450
Likes: 2
From: Baltimore
1992 explorer idling problems
The 111 code does mean 'system pass'. However (according to my Chilton manual) there are 2 O2 sensors on the '92 V6. One is on the left exhaust manifold, and the other is in the dual converter "Y" pipe.
Also, I'm not sure if a faulty IAC will yield any codes. It's very easy to remove and clean, so you might want to try that as well. There are numerous posts on how to that on this board. Just do a search on IAC and CLEAN.
Let me know what you find out.
Mike
Also, I'm not sure if a faulty IAC will yield any codes. It's very easy to remove and clean, so you might want to try that as well. There are numerous posts on how to that on this board. Just do a search on IAC and CLEAN.
Let me know what you find out.
Mike
Elder User
Joined: Aug 2002
Posts: 886
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From: Cincinnati
1992 explorer idling problems
Located by oil fill tube. This was a part I had suspected on my 92 but was considered so reliable that it wasn't a stocked item. Desperate, I ordered the fuel pressure regulator. After installing the new one, I cut open the old one to verify the cause of the problem. A flat hardened metal plate covered the valve orifice. The pressure spring on the plate was slightly off center. This caused a 30 degree bevel to be worn on the orifice surface. At idle, manifold vacuum causes the plate to lift up more and occasionally slide to the side on this bevel. This sometimes held the valve open causing very low fuel pressure. When the engine would violently shake just before stopping, the plate would be reset to a normal position and everything would be fine for a while. Easy to replace and about $60 aftermarket. Two screws, push off a rubber vacuum hose, and unscrew furl return line. 92 should have the screw on return line. Computer is very confused and you NEED to disconnect battery for 15 minutes to reset it.
