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Old 06-24-2008, 09:56   #1
OhioLibertarian
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Ford Ranger rough idle problem...

Hey...
Was wondering if anyone can give me some advice on this problem.
Got a 00 Ford Ranger that would stall when at idle if you turn the wheel hard or turn on the AC, etc.
I have changed the following:
New fuel filter
Cleaned IACV

That stopped the stalling, but it still idles really rough and sometimes sounds like its gonna stall....

Also got brand new optima red top battery and new plugs and wires (had problem before plug change)....

Thoughts?
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Old 07-07-2008, 20:49   #2
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Have you cleaned the actual throttle body? Hold the butterfly open, shoot carb cleaner in there, and scrub. Repeat until it's really clean. Carbon buildup around the rim of the throttle body just behind the blades blocks off incoming air, causing the engine to ingest less air than it should be for that throttle setting. (It will run like crap after this cleaning for a minute or two, due to all the carb cleaner in there. Let it idle until it smooths out.)

Same thing goes for the MAF/Air-flow meter. Clean it.

Does the vehicle have a tach? What RPM is it idling at? Is the MIL on? (check engine light)
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Old 07-07-2008, 21:38   #3
OhioLibertarian
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No i have not done that.... I will try to do so this weekend.
Just had the cruise control stuff replaced on recall...
It idles any where from 900 to 1300 rpms....

What do you recommend to use to clean the MAF?

MIL is on intermittantly...
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Old 07-09-2008, 15:10   #4
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Don't know specifically about 2000 Rangers, but check for a vacuum leak. All the hoses and hose ends where they connect.
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Old 07-09-2008, 23:23   #5
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I drive an '02 3.0 Ranger with 146,000 on the clock. A couple months ago I had a similar problem and took it to the dealer for a checkup. Turns out it was a bad ignition coil. After $80 more dollars and about four minutes for installation it really straightened out.
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Old 07-19-2008, 23:38   #6
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Clean your throttle body, also check your idle control sensor. I had a 2000 2.5L ranger. Same problem. My throttle body was gummed up and it had a bad idle control sensor. Bad thing about that particular engine is that nothing is adjustable and it does not have VVT. As for the cleaning of the MAS.... use an alcohol/water solution and a Q-tip. be very very careful. but the alcohol/water will evaporate very quickly and is very effective as a cleaning agent.
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Old 07-31-2008, 16:43   #7
TexasNativeDRJH
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Tap on the Mass Air Flow Sensor while it is running and see if it helps. You can try cleaning it by spraying it with carb cleaner, or buy another.

Also check the 2 hoses going to the DPFE sensor, those are common as well as the actual DPFE sensor itself.
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Old 07-31-2008, 20:52   #8
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Quote:
Originally Posted by TexasNativeDRJH View Post
Tap on the Mass Air Flow Sensor while it is running and see if it helps. You can try cleaning it by spraying it with carb cleaner, or buy another.

Also check the 2 hoses going to the DPFE sensor, those are common as well as the actual DPFE sensor itself.

+1.

I would also still suspect the IAC, at least wouldnt rule it out. With a scan tool you can manipulate it and watch its feedback, but without it your really stuck on diagnosing it properly.
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Old 08-01-2008, 10:37   #9
noway
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2000 Ford should have OBD2, have you took a reading? Does your model have a PS pressure switch since you state it stalls when turning wheels hard?

What's your idle at with AC off ? on ? wheel cut hard left or right ?
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