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Old 07-17-2013, 12:43 PM   #1
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High idle

Put a new motor in my 02 and it idles very high put after a few seconds it levels out but if you tap the gas it jumps up to about 6,000 and levels back out reallyslow! Any suggestions?
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Old 07-17-2013, 12:50 PM   #2
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First check that the throttle stop screw is properly adjusted (here's how), then test the IAC--here is how to do that...
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Old 07-17-2013, 12:58 PM   #3
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Quote:
Originally Posted by cliffyk View Post
First check that the throttle stop screw is properly adjusted (here's how), then test the IAC--here is how to do that...
Good info, if mine dies or drops when I come to a stop sign could it be my iac? Like I'll be in 3/4 and drop to nutral an it might die.. Buy just sitting its fine or if I downshift and drop speed slowly..
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Old 07-17-2013, 01:02 PM   #4
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Quote:
Originally Posted by cliffyk View Post
First check that the throttle stop screw is properly adjusted (here's how), then test the IAC--here is how to do that...
Thanks for the info. Il give it a try soon as i get a chance to get back on it
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Old 07-17-2013, 01:10 PM   #5
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Good info, if mine dies or drops when I come to a stop sign could it be my iac? Like I'll be in 3/4 and drop to nutral an it might die.. Buy just sitting its fine or if I downshift and drop speed slowly..
Yes, the IAC is the primary device, as its name implies, that the PCM uses to control the idle. When rolling to a stop the PCM keeps the idle high while the car is moving to ensure more than enough power steering system pressure to keep the power brakes working as they should, one the car stops the PCM returns to normal idle speed. If the IAC if dead/dying this process will mess up.

Test it as in the link I provided above...
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Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 07-17-2013, 03:02 PM   #6
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Quote:
Originally Posted by cliffyk View Post

Yes, the IAC is the primary device, as its name implies, that the PCM uses to control the idle. When rolling to a stop the PCM keeps the idle high while the car is moving to ensure more than enough power steering system pressure to keep the power brakes working as they should, one the car stops the PCM returns to normal idle speed. If the IAC if dead/dying this process will mess up.

Test it as in the link I provided above...
And there's no way to clean that just replace it?
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Old 07-17-2013, 10:46 PM   #7
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And there's no way to clean that just replace it?
Ford, and my experience, says no--at best cleaning it is a temporary fix, just replace it and be done...

from the shop manual:
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Old 07-21-2013, 06:36 PM   #8
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Ford, and my experience, says no--at best cleaning it is a temporary fix, just replace it and be done...

from the shop manual:
Bought a new one lol..
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