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


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Posted by 92SilverGT (Member # 2729) on :
 
ok i just replaced the heads of my 92 gt with some off of an 89 with 50k on them, while i was in there i changed my cam to an e303 and now when its really cold it surges at idle. not the normal lopy idle, but it almost dies then go to 1,500 and does it over and over again. ive got the base timing at 10 and it runs hard and strong once warm, but when i have to leave for work at 6am my neighbors dont seem to like my reving, so if anyone has any ideas i would really appreciate them, thanx
 
Posted by Blown GR40 Mystic (Member # 476) on :
 
I saw in another post you said you cleaned your IAC? maybe its messed up. test it with an ohmmeter. Also double check plugs, cap rotor wires, etc
 
Posted by 66 AC COBRA (Member # 904) on :
 
up the idle a little too, my e cam idles at 900, anything lower and it doesnt really like it, but i also have a weird setup so it could just be my lack of a lot of emmisions stuff and other wiring that is gone
 
Posted by 92SilverGT (Member # 2729) on :
 
i cleaned my iac like 3 weeks before and it worked fine. i'll try and do my idle but after its warm it idle fine at like 700, well it sounds cool, and ive got no cats either, thanx guys.
 
Posted by st5150 (Member # 51) on :
 
What MAF and injectors do you have? Have you tried playing with your idle screw and TPS settigns?
 
Posted by 92SilverGT (Member # 2729) on :
 
ive got the stock injectors and the maf. ive been messing with it a little bit and it seams to be getting better, but no it surges when im at like 1,700 rpm and its pissing me off. I raised my idle back up to about 900 give or take 50 and im gonna go and try it again. and i havent messed with my throttle stettings.
 
Posted by stoauto (Member # 2803) on :
 
when you got those heads, did you have them surfaced or checked for cracks?? when you buy useds heads always take them somewhere or to someone who can surface them or check for cracks, or any machine work that may need to be done. My car did the same thing when it was cold, when you get on it does cooolant shoot out of the overflow resevoir?? does it run warmer then before? [Big Grin]
 
Posted by 92SilverGT (Member # 2729) on :
 
nope, i didnt get them checked out. i was kinda in a hurry to get the car done because its my only ride. and no coolant shoots out and it runs pretty cold with the 160 thermastate ive been running.
 
Posted by MoostangGT (Member # 2894) on :
 
Have you checked for vacuum leaks around your intake, or may your forgot to hook a hose back up? Also you said you readjusted you idle, did you remember to check your TPS?
 
Posted by 92SilverGT (Member # 2729) on :
 
ive known about 2 vacuum leaks before i did the cam, and talking to some guys at work that ran that cam said they needed to find all vacuum leaks and 1 needed an adjustable fuel pressure regulator. and when i adjust my idle do i have to adjust the tps? if so, how?
 
Posted by MoostangGT (Member # 2894) on :
 
For adjusting the TPS visit
http://www.50tech.com/articles/display_article.php?catid=9&id=10
 




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