Idle problem on cold start up - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-27-2005
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Idle problem on cold start up

After my truck has sat for awhile, and I start it up, it runs like ***. It won't idle over about 800rpm, and if I tap the gas pedel, it drops down to 500RPM, some times to 300RPM, and some times it just stalls out. Any idea what this can be. It is a 2002 3.0L FFV, has just over 40,000 miles on it, but everything has been well maintained. Not sure if this would be a fuel or spark problem.
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Old 05-27-2005
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the rpm go LOWER when you touch the gas?


Its most likely a fuel emmitions problem of some sort.
could be injectors or spark plugs.
I would try the spark plugs first, or take it to the dealer because it only a 02
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Old 05-27-2005
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Quote:
Originally Posted by rangererv
the rpm go LOWER when you touch the gas?
When I just kinda tap it, barley any pressure, and let right off of it.

Fuel filter and spark plugs are my thoughts, but I am not sure.

About the only thing I can find in common is, last Monday afternoon, the belt partiley broke, not all the way. I was able to shut it off quickly, and replaced it a couple hours later, and it wasn't run while it was broke. That night it started doing this crap.

Quote:
Originally Posted by rangererv
or take it to the dealer because it only a 02
Quote:
Originally Posted by jdugan4859
It is a 2002 3.0L FFV, has just over 40,000 miles on it

Last edited by jdugan4859; 05-27-2005 at 03:01 PM.
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Old 05-27-2005
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Do you have the MAF mod? Do you have an aftermarket intake?
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Old 05-27-2005
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Pro-M MAF, Volant intake with a air box like whats on the 4.0L kit. Tuner is set up for it all, and it has been on there for a couple months.
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Old 05-27-2005
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Possible IAC sticking.
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Old 05-27-2005
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IAC prob sticking, or clean the damn Pro-M
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Old 05-27-2005
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IAC im sure!
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Old 05-27-2005
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Quote:
Originally Posted by rwenzing
Possible IAC sticking.
That has been one of my thoughts, but I wasn't sure what all that thing would do. Think I am gonna get a new one and replace it, luckley the Auto Zone here has the new Books, so I will be able to figure it out.
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Old 05-28-2005
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Just curious.....can the IAC be cleaned?? Maybe blow some air in that hole thingy under there??

My 4.0L does pretty much the same thing. I have the airbox mod. Maybe that has something to do with it?

Thanks ya'll.
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Old 05-28-2005
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I ordered a new one today. It was special order, and will be in Tuesday, I will let you know how it does. I will try and clean mine out as well, and see what that does, although, it has a sticker that says something about not trying to clean it.
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Old 06-01-2005
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Well I feel like a dumb ***. New part came in today, put it on, still was doing it. I looked over everything, and I got to the MAS. Seems as though I fogot to plug the connector back in when I put the intake back in after changing the belt. Live and learn I guess.
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Old 06-01-2005
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yep that might just do it
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