This is topic 93 mustang idle surge in forum Tech Talk at Northern California Ford Owners  .


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Posted by FOXX5.0 (Member # 9094) on :
 
So it only dose it when my temp is to were it supposed to be and here n there the idle will jus drop while driving it it dosent turn off jus.the rpm will drop. Wen the car is stopped the rpm jus goes up n down I change the fuel pump but still nothin oh btw wen its cold it drives like nothing is wrong lmk cafords would it be a bad tps? I checked for vacuum leaks and none lmk thanks [patriot]
 
Posted by quickblue302 (Member # 7912) on :
 
Check for vac leaks, tps, egr, iac....
 
Posted by 93 twintrbo (Member # 10475) on :
 
Unplug both oxygen sensors ( upstream) and see if the idle surge goes away. I had a 5.0 explorer do the exact same thing. Was at 2 other shops and one ford dealership and they replaced just about everything but the problem. Turned out to be lazy upstream oxygen sensors.

Lawrence
 
Posted by 89foxstang (Member # 5908) on :
 
is it auto or stick? like said above i would check tps voltage recheck for vacuum leaks they can be a pain but sometimes can show up when heat is introduced, also check your coolant temp sensor make sure the car doesnt think the car is still cold or somthing also check the iat same reason, clean the maf (if applicable dont remember the year) i would def look at the temp sensors since it seems to be temp related. lmk
 
Posted by FOXX5.0 (Member # 9094) on :
 
quote:
Originally posted by 89foxstang:
is it auto or stick? like said above i would check tps voltage recheck for vacuum leaks they can be a pain but sometimes can show up when heat is introduced, also check your coolant temp sensor make sure the car doesnt think the car is still cold or somthing also check the iat same reason, clean the maf (if applicable dont remember the year) i would def look at the temp sensors since it seems to be temp related. lmk
I changed the tps and cleaned the maf and the iac can find any leaks Ima try the coolent sensor and the oxygen. Sensors this is jus so annoying BTW its a 5 speed

[ August 10, 2011, 07:28 PM: Message edited by: FOXX5.0 ]
 
Posted by Camara90 (Member # 134) on :
 
Try cleaning and seperating your salt and pepper plugs.
 
Posted by Santos1986gt (Member # 10513) on :
 
I dont know if this will help but try checking the wiring of the sensors and ground for corrosion. Spray wd40 in sensors and put electrical grease in connectors. My cousin gt had the same problem and that helped.
 
Posted by racsirx (Member # 1710) on :
 
Did you finish putting it back to stock? I can look at it again if you did.
 
Posted by FOXX5.0 (Member # 9094) on :
 
quote:
Originally posted by racsirx:
Did you finish putting it back to stock? I can look at it again if you did.
Lee yea I put it back to stock ill give u a call after work 2marrow to see if I can stop by
 
Posted by FOXX5.0 (Member # 9094) on :
 
Thanks guys for ur input Ima take it to lee if he finds out what is wrong with it ill be sure to put it up [patriot]
 
Posted by FOXX5.0 (Member # 9094) on :
 
It was a bad distributer thanks agin lee for fixing that great guy after a long time finally fixed lol [Big Grin]
 




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