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» Northern California Ford Owners     » Automotive   » Tech Talk   » Damn idle issue

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Author Topic: Damn idle issue
fam_lace
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Alright I got a issue with a hunting idle on a 86 mustang so it's idles fine until it heats up it's basically stock but it does have a b cam in with shortys and a 130amp alternator. I found the egr leaking and a couple vac hoses fix them, there is no vacuum leaks I cleaned the build up behind the heads and in the throttle body that shit was damn near plugged solid I put 2 different tps on the iac was Farley new besides the map sensor what other issues could I have timing is good I just rebuilt the motor it has about 500 miles on it

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rip matt i love u cuz
351w h/c/I street car
Posts: 776 | From: dont trip | Registered: Aug 2008  |  :
4IDFOX
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If the IAC has ever been replaced it is a diode in the harness that goes to the IAC. Early cars had the diode in the harness. Sometime along the way Ford moved the diode inside the IAC.

Here is a thread on the subject.

http://vb.foureyedpride.com/showthread.php?134024-Wanted-dead-or-alive-Hanging-Surging-Idle-SOLVED!!

Easy fix.
Posts: 375 | From: Redding CA | Registered: Apr 2010  |  :
fredfifty
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Tps voltage?
Posts: 4953 | Registered: Sep 2010  |  :
fam_lace
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quote:
Originally posted by 4IDFOX:
If the IAC has ever been replaced it is a diode in the harness that goes to the IAC. Early cars had the diode in the harness. Sometime along the way Ford moved the diode inside the IAC.

Here is a thread on the subject.

http://vb.foureyedpride.com/showthread.php?134024-Wanted-dead-or-alive-Hanging-Surging-Idle-SOLVED!!

Easy fix.
Thank you I'll look into that I didn't know about the diodes

--------------------
rip matt i love u cuz
351w h/c/I street car
Posts: 776 | From: dont trip | Registered: Aug 2008  |  :
fam_lace
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quote:
Originally posted by fredfifty:
Tps voltage?
1v

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rip matt i love u cuz
351w h/c/I street car
Posts: 776 | From: dont trip | Registered: Aug 2008  |  :
Martinna
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Speed density cars don't like cams. A custom tune can help. Spend that money on a mass air conversion instead.
Posts: 1093 | From: City | Registered: Oct 2012  |  :
4IDFOX
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quote:
Originally posted by Martinna:
Speed density cars don't like cams. Spend money on a Megasquirt instead.
Fixed that for you. [Big Grin]
Posts: 375 | From: Redding CA | Registered: Apr 2010  |  :


 
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