This is topic Damn idle issue in forum Tech Talk at Northern California Ford Owners  .


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Posted by fam_lace (Member # 8565) on :
 
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
 
Posted by 4IDFOX (Member # 9921) on :
 
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.
 
Posted by fredfifty (Member # 10320) on :
 
Tps voltage?
 
Posted by fam_lace (Member # 8565) on :
 
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
 
Posted by fam_lace (Member # 8565) on :
 
quote:
Originally posted by fredfifty:
Tps voltage?
1v
 
Posted by Martinna (Member # 12493) on :
 
Speed density cars don't like cams. A custom tune can help. Spend that money on a mass air conversion instead.
 
Posted by 4IDFOX (Member # 9921) on :
 
quote:
Originally posted by Martinna:
Speed density cars don't like cams. Spend money on a Megasquirt instead.
Fixed that for you. [Big Grin]
 




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