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Thread: RPM not super steady?

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  1. #1
    Lifetime Member Getting Dirty Matt's Avatar
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    Loss of oil pressure is due to a loss of RPM, not the other way around. Mechanical pumps depend on engine RPM to pick up the oil.... so if the engine starts to stall for some reason you will lose oil pressure.

  2. #2
    Senior Member Getting Dirty superacerc's Avatar
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    Sorry bout that. I saw a bunch of A's and C's together and missed IAC. I've never cleaned one before. Any tips? I take it it's on the throttle body.
    2007 Commander 4.7L, QTII, OEM Towing Option, tow hooks, 2"OME + 1/4" rusty's leveling spacer, Bilstein 5150 Rear Shks, Rear sway bar removed, 4xguard front skid, Offroad Unlimited Defender Roof Rack, Hella 500FF lights, 265/70/R17 BFG KM2 M/Ts 1.5" Rough Country Wheel Spacers
    http://www.theultimatejeep.com/showt...acerc-s-Garage

  3. #3
    Lifetime Member Getting Dirty Matt's Avatar
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    yup. easiest thing to do it look up your IAC on a parts website so you can see a picture of it (if you dont know what it looks like)... they're normally very easy to get to.

    To clean it you can fill the ports up with carb cleaner/gum cutter/etc... let it sit for ~15 minutes.... dump it out... refill and let it sit for another 5-10 minutes.... then spray the hell out of it.... let it dry and reinstall. Sometimes this work and clears up the issues for a long time, other times it works for just a few days and the symptoms come back (in which case you'd just order a new one).

  4. #4
    Senior Member Getting Dirty superacerc's Avatar
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    Roger! I'll get on it this weekend. Thanks guys!
    2007 Commander 4.7L, QTII, OEM Towing Option, tow hooks, 2"OME + 1/4" rusty's leveling spacer, Bilstein 5150 Rear Shks, Rear sway bar removed, 4xguard front skid, Offroad Unlimited Defender Roof Rack, Hella 500FF lights, 265/70/R17 BFG KM2 M/Ts 1.5" Rough Country Wheel Spacers
    http://www.theultimatejeep.com/showt...acerc-s-Garage

  5. #5
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    Hey just to add my .02 pennies, had the same problem and it was the throttle position sensors. It's mounted right next to the IAC.
    2006 Jeep Commander Limited, 4.7L, QDII, 4" Superlift Supension Lift, Procomp Xtreme Mud Terrain Tires 285 70R17, Mickey Thompson Classic ii Wheels 17X9, AEM Brute Force CAI, Superchip flashpaque, 4XGuard belly guard, 4XGuard Front Guard, Rear Grab handles and Defender Roof Rack.

  6. #6
    Senior Member Getting Dirty superacerc's Avatar
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    Hey patrick! Thanks. What did you have to do to it? Been a long time.
    2007 Commander 4.7L, QTII, OEM Towing Option, tow hooks, 2"OME + 1/4" rusty's leveling spacer, Bilstein 5150 Rear Shks, Rear sway bar removed, 4xguard front skid, Offroad Unlimited Defender Roof Rack, Hella 500FF lights, 265/70/R17 BFG KM2 M/Ts 1.5" Rough Country Wheel Spacers
    http://www.theultimatejeep.com/showt...acerc-s-Garage

  7. #7
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    Yeah it's been awhile, savannah is still the same. There is a new atv park, big nasty atv, that just opened up and there allowing jeeps and trucks there now. It's about 1600 acres. Next time your in town we'll have to check it out.

    It was kinda crazy for the longest time I was watching my RPMs flucuate after starting the jeep, but after driving it would be fine. Well as time went on it stated doing it all the time. First start up, stopped in traffic, when ever. I read on the other forum where another member had the same problem, everyone kept saying IAC, but he came back and said it was his throttle positon sensor. Since the throttle position sensor was the cheapest I went with that. I believe it's only held in with 2 torque bits or star bits and electrical connector. It was a pretty easy fix.
    2006 Jeep Commander Limited, 4.7L, QDII, 4" Superlift Supension Lift, Procomp Xtreme Mud Terrain Tires 285 70R17, Mickey Thompson Classic ii Wheels 17X9, AEM Brute Force CAI, Superchip flashpaque, 4XGuard belly guard, 4XGuard Front Guard, Rear Grab handles and Defender Roof Rack.

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