They're your idle air control (passenger side) and MAP (driver side). It won't idle?
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That looks like connector C201. I posted pic of the TCM above.
Originally Posted by jdfabworks2013
(Post 3112389)
So let's say they are good. I'm still having same issue. It turns over good,but will only fire up and run if I give it gas and feather/pump gas pedal to keep it running. And it runs good if I keep my foot on gas to keep it idling. It doesn't stumble,misfire or anything. And also,I'm not sure if this is the TCM I'm supposed to be looking for.... it's just to the right of the steering column under dash. Anyone Yay or nay? Sorry these jeeps are all new to me.........
https://cimg0.ibsrv.net/gimg/www.che...a3c6984793.jpg |
Originally Posted by Battle
(Post 3112519)
They're your idle air control (passenger side) and MAP (driver side). It won't idle?
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2 Attachment(s)
Not a text book troubleshooting attempt but check your TPS. Here's a pic that shows the steps.
Mind you, this test only tests the voltage extremes not the TPS sweep. You can do a sweep test using an analog voltmeter if required (looks for dead spots in the TPS resistor). You can back probe #2 pin and move the throttle very slowly and look for an interruption in the voltage reading (dead spot). Attachment 313881 Use a small safety pin as a back probe. Pic shows a variety of safety pins, use the #1 pin. Attachment 313882 |
Just an FYI, make certain that your battery is fully charged and then when you get it cranked, keep it running by feathering the pedal for several minutes tto warm the engine and "slowly" ease off the pedal and see if it will catch an idle... anytime the battery goes dead for whatever reason, all of the "adaptive memory" will be reset... which basically means, if the computer was compensating for normal wear and tear, itt will need to relearn... and that requires several minutes of runtime.
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Originally Posted by KennyG
(Post 3112979)
Just an FYI, make certain that your battery is fully charged and then when you get it cranked, keep it running by feathering the pedal for several minutes tto warm the engine and "slowly" ease off the pedal and see if it will catch an idle... anytime the battery goes dead for whatever reason, all of the "adaptive memory" will be reset... which basically means, if the computer was compensating for normal wear and tear, itt will need to relearn... and that requires several minutes of runtime.
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Originally Posted by KennyG
(Post 3112979)
Just an FYI, make certain that your battery is fully charged and then when you get it cranked, keep it running by feathering the pedal for several minutes tto warm the engine and "slowly" ease off the pedal and see if it will catch an idle... anytime the battery goes dead for whatever reason, all of the "adaptive memory" will be reset... which basically means, if the computer was compensating for normal wear and tear, itt will need to relearn... and that requires several minutes of runtime.
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Ok so I did the sweep test on the TPS. It was within parameters. At start (throttle closed) it read .773V and at WOT it read 4.0V. I checked resistance as well,it read around 10 ohms closed and read open upon moving throttle to WOT. So I assumed the TPS is good. I tried to start jeep for the hell of it. It cranked and fired right up like no problem ever existed!! And it's idling as I am typing this! I am baffled right now! Do I let my daughter roll with it and drive it? Or dive deeper into the underlying issues? Thanks again for help!
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Originally Posted by jdfabworks2013
(Post 3117392)
Ok so I did the sweep test on the TPS. It was within parameters. At start (throttle closed) it read .773V and at WOT it read 4.0V. I checked resistance as well,it read around 10 ohms closed and read open upon moving throttle to WOT. So I assumed the TPS is good. I tried to start jeep for the hell of it. It cranked and fired right up like no problem ever existed!! And it's idling as I am typing this! I am baffled right now! Do I let my daughter roll with it and drive it? Or dive deeper into the underlying issues? Thanks again for help!
YOU drive it for awhile and see if it acts up again. By removing and reinstalling the TPS connector you may have cleaned off the connector pins and pin cavities enough to create good contacts. They do need cleaning occasionally. I use a product called Max Professional Electronics Lubricant, Item Code LL-004-125. 11 oz. spray can. Just bought a new can the other day off Amazon. |
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