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View Full Version : 97 explorer idling hile


lilfoot
01-06-2009, 09:56 AM
what would cause my explorer to idle at 2500 rpm i've replaced the tps and iac still no luck any ideas?

radman
01-06-2009, 11:48 AM
coolant temp sensor for the ecu?

C.W.
01-06-2009, 12:18 PM
Vacumn leak..............

What codes is it throwing?

lilfoot
01-07-2009, 12:54 PM
the engine code that comes up is P 1120 manufacturer controlled fuel and air metering

Styx
01-09-2009, 08:12 AM
Ya check for vacume leaks and clean the MAF sensor...
:confused0006:

lilfoot
01-09-2009, 10:43 AM
cant find any vacum leaks and put in a different maf still no luck freakin fords!
somebody told me its possible the ecu has crapped out

Styx
01-09-2009, 09:15 PM
Possible but not likly in the 15 years I spent with ford I prolly only replaced 1 or 2 PCM's...
How did you check for vacume leaks???

lilfoot
01-11-2009, 11:55 AM
when I disconect the iac it idles normal around 500rpm
I've replaced the iac tps maf charge air and ecu temp sending
The idle still hunts

Styx
01-11-2009, 05:04 PM
when I disconect the iac it idles normal around 500rpm
I've replaced the iac tps maf charge air and ecu temp sending
The idle still hunts

Is this how you checked for a vacume leak???
When you disconnected the IAC it should have stalled out It was pulling in un-metered air Is it the OHV or the OHC 4.0L...???
The OHC it might be the the intake manifold O rings or the PCV hose.
If its the OHV engine check for coolant leaks at the front of the lower intake which would indicate an intake manifold leak and prolly the cause of the vacume leak...
Cheers Randy...

lilfoot
01-12-2009, 10:44 AM
thanx randy its ohv(x engine) my dad sprayed some brake clean around the upper intake and vacum hoses cause thats what i thought it was still no luck so finally i changed the brain and so far it has seemed to solve the problem of high idling and hunting.thanxs once again for all the info,i'm hoping this has solved this 3 month problem.