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Old 11-18-2011, 05:41 PM   #1
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Idle issues HELP

I have a 95 3.8 . When I start it it revs up to. 3000 rpm . I put it in gear it drops to 1500 and stays there. I've checked for vacuum leaks,changed the throttle positioning sensor,changed mass airflow, o2 sensors , even a new ecu. I'm lost can anyone help?
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Old 11-18-2011, 05:54 PM   #2
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Clean or replace you iacv.
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Old 11-18-2011, 06:39 PM   #3
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Re: Idle issues HELP

I Tried that also it still is revving think resetting the ecu would work?
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Old 11-18-2011, 06:59 PM   #4
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Have you checked the dpfe. If you have a haynes manual, it will tell you the voltage specs. Get the autozone one if you do need one. I found out, after spending $100 for a "genuine" motorcraft dpfe, that they get that same piece, scrape off the logo, and sell it for a third of the price!
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Old 11-18-2011, 07:03 PM   #5
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Have you checked the dpfe
Dpfe?
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Old 11-18-2011, 07:11 PM   #6
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(edited above some)

Diffetential pressure.... Lol. I forget the exact name, but it's vacuum lined in with the egr. It makes sure the egr is functioning properly.

You'd need a multi-meter to check it.

---------- Post added at 07:11 PM ---------- Previous post was at 07:09 PM ----------

Quote:
Originally Posted by DHall31
I Tried that also it still is revving think resetting the ecu would work?
Any time you disconnect the battery for a few min, hours, days.... It should reset the ecu. Couldn't hurt. Just make sure you have your radio code.
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Old 11-18-2011, 07:14 PM   #7
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Quote:
Originally Posted by Mustang Convert
(edited above some)

Diffetential pressure.... Lol. I forget the exact name, but it's vacuum lined in with the egr. It makes sure the egr is functioning properly.

You'd need a multi-meter to check it.

---------- Post added at 07:11 PM ---------- Previous post was at 07:09 PM ----------



Any time you disconnect the battery for a few min, hours, days.... It should reset the ecu. Couldn't hurt. Just make sure you have your radio code.
Thank I'll give it a try tomorrow
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Old 11-19-2011, 09:32 PM   #8
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Thank I'll give it a try tomorrow
Well that didn't work I'm all out of ideas
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Old 11-19-2011, 10:21 PM   #9
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Quote:
Originally Posted by DHall31

Well that didn't work I'm all out of ideas
You said you got a new ecu!.. Is it possible that the program in it is wrong??.... ie. idle is set real high for some reason?!?.... Don't know just trying to brainstorm a little for ya!!.....
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Old 11-23-2011, 06:33 PM   #10
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I've tried everything everyone has told me to no avail this car is really ticking me off lol I can't figure this thing out . I'm not a mechanic and mechanics are scratching their heads on this one. Any more advise will be greatly appreciated.
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