STERLING STINGER Posted March 14, 2012 Share Posted March 14, 2012 My 92 just started to idle wierd Like fluctuating It was sitting idling for about 10 mins and stalled The rpms just go down and it stalls out It is happening as i type. Any ideas? Link to comment Share on other sites More sharing options...
Pete M Posted March 14, 2012 Share Posted March 14, 2012 idle sensor? Link to comment Share on other sites More sharing options...
cruiser54 Posted March 14, 2012 Share Posted March 14, 2012 Have you ever cleaned your throttle body and IAC? That's where I would start. Link to comment Share on other sites More sharing options...
JENSSEN Posted March 15, 2012 Share Posted March 15, 2012 Same issue ,.. New o2 sensor and fixed Link to comment Share on other sites More sharing options...
STERLING STINGER Posted March 15, 2012 Author Share Posted March 15, 2012 Cool. Wheres the o2 sensor located? Thanks!! Link to comment Share on other sites More sharing options...
JENSSEN Posted March 15, 2012 Share Posted March 15, 2012 In the exhaust manifold,.. Change the upstream ,.. Also look at the EGR Link to comment Share on other sites More sharing options...
STERLING STINGER Posted March 15, 2012 Author Share Posted March 15, 2012 U messin with me or somethin? Link to comment Share on other sites More sharing options...
jonb8 Posted March 15, 2012 Share Posted March 15, 2012 No he's not messing with you, look right below were the exhaust manifold bolts to the down pipe. Take it out hot and put it in cold so you have a better chance of not stripping out the threads. Buy a good one too and not a cheap unifit. Link to comment Share on other sites More sharing options...
Pete M Posted March 15, 2012 Share Posted March 15, 2012 shouldn't a 92 throw the check engine light if the o2 sensor is failing? :dunno: Link to comment Share on other sites More sharing options...
STERLING STINGER Posted March 15, 2012 Author Share Posted March 15, 2012 No he's not messing with you, look right below were the exhaust manifold bolts to the down pipe. Take it out hot and put it in cold so you have a better chance of not stripping out the threads. Buy a good one too and not a cheap unifit. Ok thanks, i really thought he was saying like a muffler bearing or something....lolol Pete: I'm not sure. Link to comment Share on other sites More sharing options...
Pete M Posted March 16, 2012 Share Posted March 16, 2012 I would start with the free stuff. clean the TB and IAC with a throttle body cleaner (meaning O2 sensor safe) and an old toothbrush. :thumbsup: Link to comment Share on other sites More sharing options...
STERLING STINGER Posted March 25, 2012 Author Share Posted March 25, 2012 I would start with the free stuff. clean the TB and IAC with a throttle body cleaner (meaning O2 sensor safe) and an old toothbrush. :thumbsup: TB? IAC? no clue what these are or the cleaning part Link to comment Share on other sites More sharing options...
Pete M Posted March 25, 2012 Share Posted March 25, 2012 throttle body and idle air controller. the IAC controls the idle speed. :thumbsup: when it gets gummed up, it can do weird things to the idle. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2012 Share Posted March 26, 2012 In the exhaust manifold,.. Change the upstream ,.. Also look at the EGR No EGR on his HO, and only one O2 sensor. Before you pull the O2 though do the other stuff as mentioned. Also unplug the cable connector and check the pins and sockets (4) on the O2 sensor harness for corrosion. I would start with the free stuff. clean the TB and IAC with a throttle body cleaner (meaning O2 sensor safe) and an old toothbrush. :thumbsup: I only have one toothbrush, so I use it for everything. Link to comment Share on other sites More sharing options...
Pete M Posted March 26, 2012 Share Posted March 26, 2012 Don, your truck is so clean you could get away with it. :rotf: Link to comment Share on other sites More sharing options...
Harley Posted March 26, 2012 Share Posted March 26, 2012 Don, your truck is so clean you could get away with it. :rotf: :agree: :cheers: Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2012 Share Posted March 26, 2012 I've been using the same toothbrush for cleaning everything for a long time now. It's getting pretty nasty. Even Gus won't use it anymore. maybe it's time to invest in another......... Link to comment Share on other sites More sharing options...
Pete M Posted March 26, 2012 Share Posted March 26, 2012 do they make a chromed one? Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2012 Share Posted March 26, 2012 Well, actually the one I have now is polished stainless, not chrome. But it has brass bristles. :D Link to comment Share on other sites More sharing options...
STERLING STINGER Posted March 26, 2012 Author Share Posted March 26, 2012 In the exhaust manifold,.. Change the upstream ,.. Also look at the EGR No EGR on his HO, and only one O2 sensor. Before you pull the O2 though do the other stuff as mentioned. Also unplug the cable connector and check the pins and sockets (4) on the O2 sensor harness for corrosion. I would start with the free stuff. clean the TB and IAC with a throttle body cleaner (meaning O2 sensor safe) and an old toothbrush. :thumbsup: I only have one toothbrush, so I use it for everything. Thanks. Ill send you a new toothbrush if it works!! So just pull the o2 sensor and check it for corrosion. Got it Pull the sensor off itself also or just the plug? Link to comment Share on other sites More sharing options...
Pete M Posted March 26, 2012 Share Posted March 26, 2012 Don, do the HO MJs trip a check engine light if the O2 sensor goes south? Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2012 Share Posted March 26, 2012 So just pull the o2 sensor and check it for corrosion. Got it Pull the sensor off itself also or just the plug? Just the electrical connector to start. Also follow the harness up to where it goes into the fuel injector rail and make sure it's not fried or shorted. It passes pretty close to the exhaust manifold. If everything electrically passes the eyeball test, might as well replace the O2 sensor. If it's the original it's overdue.............. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2012 Share Posted March 26, 2012 Don, do the HO MJs trip a check engine light if the O2 sensor goes south? The OBDI system is supposed to Pete, although I've never had one. The codes are as follows: 21: Oxygen sensor or circuit. O2 sensor or wiring faulty. 51: O2 detects lean mixture. Check sensor and circuit and for vacuum leaks. 52: O2 detects rich mixture. Check fuel injection system and sensor. This is a good point, and I continually forget about it. To the original poster, do check the fault codes using the ignition key sequence as below to see if anything shows up that's not normal. http://www.comancheclub.com/forums/viewtopic.php?f=9&t=29857 Link to comment Share on other sites More sharing options...
Harley Posted March 26, 2012 Share Posted March 26, 2012 do they make a chromed one? Gotta find one with chrome bristles otherwise I doubt he'll use it and it'll just collect dust on a shelf Link to comment Share on other sites More sharing options...
2360 Posted March 26, 2012 Share Posted March 26, 2012 I'd drain the fuel filter and see how much water is in it. Sometimes I get 2 or 3 tablespoons of water out of my filter. Truck works real smooth till the next time it starts acting up. Link to comment Share on other sites More sharing options...
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