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Old 05-25-2010, 06:36 PM   #1
burton160w's Avatar
Join Date: Oct 2009
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CEL P1294, Now What?

So I discussed before the problems I've been having. My check engine light has come on and after a ODBII scan at AutoZone I got back a P1294. It's only throwing the code once and it's the only code being thrown. The guy @ AutoZone shut it off for me for free but now I have to fix the problem.

Target Idle Speed Not Reached

Now this is understandable. My idle RPMs have run at about 1k - 2k, and vary more so along 1.5k - 2.0k. If I tap the gas sometimes it will drop back down to 1k, but my Jeep is idling too high at this point.

The probable causes are...
  • Mechanical condition vacuum leak
  • throttle cable not free
  • idle speed screw misadjusted

I'm in North Philly so really I don't have an opportunity till Friday to address the problem, but where would you guys start if this was your Jeep? Like I said, it's the one and only code being thrown and my idle is too high so it's not lying or unexpected.

It's got a Willy's body, a Chevy engine, Ford axles, GM transmission, and Dodge steering components... it must be a Wrangler.
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Old 05-25-2010, 06:59 PM   #2
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Check for vacuum leaks .. if nothing then try cleaning your throttle body and IAC if you haven't already. Most of the time cleaning IAC takes care of the problem. Let us know how it goes.

98 TJ 4.7 Stroker!!! Unichip tuner, HPD30/D44, 4.56, Detroit Locker in rear axle, 3.25RC SL, 1.25BL, 1MML, 35x12.50x15, Cager Softs 15x8, XRC10 winch, Rancho 9000XL shocks with wireless remote
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Old 05-25-2010, 07:17 PM   #3
Knows a couple things...

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Location: Escondido, Calif.
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There is no idle set screw. A high idle can be caused by a vacuum leak or an IAC (Idle Air Controller) that is dirty enough to stick & allow too much air past it.

So as Banipal19 suggests, I would first try cleaning the throttle body's interior with a good throttle body cleaner in an aerosol can. Per the instructions, the engine should be running while you spray, taking care to get some of the spray into that horizontal slot above the butterfly valve plate near the top of the inside of the throttle body. The IAC gets its air through that slot so getting a little cleaner into the IAC via that slot is what you want.

The engine may try to stall so just keep one hand on the throttle linkage to keep the rpms up just high enough so the engine doesn't stall.
When you have a choice, buy American.

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Old 03-27-2012, 11:09 AM   #4
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reviving an old thread here instead of creating a new one on the same subject. I am having this issue, but have already tried the cleaning, and replacement of the IAC module. RPMs went down to where they should be, but at times they still stay higher than normal. P1294 came back after I had cleared the computer after about 4 or 5 days with the new IAC module.

I can hear what appears to be a faint vacuum leak on the driver side during idle, but cannot pin point it. I have even tried sticking a hose into my ear to help with finding the exact leak with no luck.

Instead of spending more time finding this leak i feel its best to just replace it all, but having a hard time finding the "kit" or parts needed for this. Anyone out there ever come across this?
"And then one day you find
Ten years have got behind you
No one told you when to run
You missed the starting gun"
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