I know this question is asked alot but....
02-21-2006, 01:44 AM
#1
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I know this question is asked alot but....
I am not much on the Ford EFI meaning i havent messed with them that much. I have a question concerning the idle.
On my car its an 86 converted to MAF. I fixed the problem with the intake leaking and solved the rough idle and loading up problem.
But now if you come to red light sometimes it will idle at 750 rpms and the next red light might be 1500 rpms. The car is a manual so its not to hard to control just dont like the high idle. I tried this one the way home form work today and it seemed to help but its a pain to do and kinda retarded to have to do it to get it to idle correct, i can turn the car off and restart and its back to normal around 700-750 rpms. Would i tbe safe to say its definately the iac motor or am i leaning in the wrong direction? The only thing i have changed from before when it would idle a constant rpm is fixed a vacum leak and bumped the timing a little. Which the timing is a little more than the car likes but i plan on fixing that tomorrow. Just wanna know if leaning toward the iac is correct or should i look at something else?
***I think the iac when i shut the car off and restart it the iac is resetting itself allowing it to idle normal. This is why i lean toward it as problem area.
On my car its an 86 converted to MAF. I fixed the problem with the intake leaking and solved the rough idle and loading up problem.
But now if you come to red light sometimes it will idle at 750 rpms and the next red light might be 1500 rpms. The car is a manual so its not to hard to control just dont like the high idle. I tried this one the way home form work today and it seemed to help but its a pain to do and kinda retarded to have to do it to get it to idle correct, i can turn the car off and restart and its back to normal around 700-750 rpms. Would i tbe safe to say its definately the iac motor or am i leaning in the wrong direction? The only thing i have changed from before when it would idle a constant rpm is fixed a vacum leak and bumped the timing a little. Which the timing is a little more than the car likes but i plan on fixing that tomorrow. Just wanna know if leaning toward the iac is correct or should i look at something else?
***I think the iac when i shut the car off and restart it the iac is resetting itself allowing it to idle normal. This is why i lean toward it as problem area.
02-21-2006, 01:58 AM
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RE: I know this question is asked alot but....
Sounds like the throttle position sensor to me. Disconnect the battery and use a multimeter on the pins on the tps. Check both ways with the multimeter because there is a diode in the tps, should give some resistance. If it indicates an open both ways it's no good. This is a resistance check btw. You can pull your iac off and clean it, usually that's all that's wrong with them.
Rob
Rob
02-21-2006, 02:06 AM
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RE: I know this question is asked alot but....
Ok what do you mean check it both ways?
I know how to do resistance test but are you saying i need to check the sensor for open circuit between the green and black, and green and red
I know how to do resistance test but are you saying i need to check the sensor for open circuit between the green and black, and green and red
02-21-2006, 02:20 AM
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RE: I know this question is asked alot but....
It's a diode which means it only passes currect one way. I know there's 3 prongs there, I just can't remember which two you check across. What I meant by both ways is swap the leads positive and negative between each 2 prongs. Just check continuity between all of them both ways swapping the leads. If you don't get a resistance reading it's no good. If you do, something around 10 ohms, it should be okay. You can also check it with the battery connected, check for a voltage as you open the throttle body, it should increase smoothly.
Rob
Rob
02-21-2006, 10:09 AM
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RE: I know this question is asked alot but....
02-21-2006, 01:23 PM
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RE: I know this question is asked alot but....
Well i think i figured it out .. The damn polymer intake is still leaking where the throttle body and egr bolts up. Im on the verge of getting a BFH and killing it...