STERLING STINGER Posted March 14, 2012 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?
cruiser54 Posted March 14, 2012 Posted March 14, 2012 Have you ever cleaned your throttle body and IAC? That's where I would start.
STERLING STINGER Posted March 15, 2012 Author Posted March 15, 2012 Cool. Wheres the o2 sensor located? Thanks!!
JENSSEN Posted March 15, 2012 Posted March 15, 2012 In the exhaust manifold,.. Change the upstream ,.. Also look at the EGR
jonb8 Posted March 15, 2012 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.
Pete M Posted March 15, 2012 Posted March 15, 2012 shouldn't a 92 throw the check engine light if the o2 sensor is failing? :dunno:
STERLING STINGER Posted March 15, 2012 Author 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.
Pete M Posted March 16, 2012 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:
STERLING STINGER Posted March 25, 2012 Author 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
Pete M Posted March 25, 2012 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.
HOrnbrod Posted March 26, 2012 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.
Pete M Posted March 26, 2012 Posted March 26, 2012 Don, your truck is so clean you could get away with it. :rotf:
Harley Posted March 26, 2012 Posted March 26, 2012 Don, your truck is so clean you could get away with it. :rotf: :agree: :cheers:
HOrnbrod Posted March 26, 2012 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.........
HOrnbrod Posted March 26, 2012 Posted March 26, 2012 Well, actually the one I have now is polished stainless, not chrome. But it has brass bristles. :D
STERLING STINGER Posted March 26, 2012 Author 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?
Pete M Posted March 26, 2012 Posted March 26, 2012 Don, do the HO MJs trip a check engine light if the O2 sensor goes south?
HOrnbrod Posted March 26, 2012 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..............
HOrnbrod Posted March 26, 2012 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
Harley Posted March 26, 2012 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
2360 Posted March 26, 2012 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.
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