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Re: 99 Ranger Random Idle RPM Problem
Ford Trucks Ford Trucks (alt.trucks.ford)
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#1
 
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Re: 99 Ranger Random Idle RPM Problem -
07-04-2003
, 02:18 AM
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Hi Group, 1999 Ford Ranger 4 cyl., 5 speed man.,105,000 miles, I have put every mile on it. At 104,000 miles put in new plugs & plug wires (1st time), air filter, fuel filter, PVC valve (2nd time). I was beginning to have a very low idle RPM, which would cause the truck to stall, it was getting worse so figured it was due for a tune up. The truck ran smooth otherwise. Since tuning the truck up the very low idle RPM does not happen all the time only every once in awhile, very random. Some days it runs great all day, other days it idles poorly all day, some days it comes and goes. If there was a way to set the idle RPM I believe my problem would be solved, but the computer controls all that, the truck does not have a tach so I can't give you a RPM number. The truck passed emissions testing no problem after the tune-up, it was idling fine when I went for the test. It has never failed the test before. Anyways what could cause this very random idle RPM problem? If I took it to Auto Zone and had them hook their computer to it would that tell me anything? Thanks for any ideas. Ken Hi Group, |
Just wanted to let everyone know what I have found so far. On another
discussion board someone suggested tapping on the IAC solenoid, which I did
with the plastic end of a screw driver, started the truck up and everything
was idling just fine. So does that mean the IAC is bad? Or do I just tap on
it when it acts up again? The IAC is $111.00 from the Ford dealer. Also
found someone suggesting cleaning the MAF sensor, helps with idling and
pinging problems. The MAF is $187.00 from the Ford dealer, with a $75.00
core charge. I did notice that the MAF has a drop of glue or solder on one
of the torx screw heads, and the other screw head has a small post sticking
up so you can't use a regular torx screw driver, so I guess they don't want
you opening this unit up. Wonder if they will still give you the $75.00 core
charge back if you do open the MAF up?
Thanks, Ken
#2
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"Ken" <kenfromtn (AT) hotmail (DOT) com> wrote in message news:ZddMa.87$t62.0 (AT) newssvr19 (DOT) news.prodigy.com... Hi Group, 1999 Ford Ranger 4 cyl., 5 speed man.,105,000 miles, I have put every mile on it. At 104,000 miles put in new plugs & plug wires (1st time), air filter, fuel filter, PVC valve (2nd time). I was beginning to have a very low idle RPM, which would cause the truck to stall, it was getting worse so figured it was due for a tune up. The truck ran smooth otherwise. Since tuning the truck up the very low idle RPM does not happen all the time only every once in awhile, very random. Some days it runs great all day, other days it idles poorly all day, some days it comes and goes. If there was a way to set the idle RPM I believe my problem would be solved, but the computer controls all that, the truck does not have a tach so I can't give you a RPM number. The truck passed emissions testing no problem after the tune-up, it was idling fine when I went for the test. It has never failed the test before. Anyways what could cause this very random idle RPM problem? If I took it to Auto Zone and had them hook their computer to it would that tell me anything? Thanks for any ideas. Ken Hi Group, Just wanted to let everyone know what I have found so far. On another discussion board someone suggested tapping on the IAC solenoid, which I did with the plastic end of a screw driver, started the truck up and everything was idling just fine. So does that mean the IAC is bad? Or do I just tap on it when it acts up again? The IAC is $111.00 from the Ford dealer. Also found someone suggesting cleaning the MAF sensor, helps with idling and pinging problems. The MAF is $187.00 from the Ford dealer, with a $75.00 core charge. I did notice that the MAF has a drop of glue or solder on one of the torx screw heads, and the other screw head has a small post sticking up so you can't use a regular torx screw driver, so I guess they don't want you opening this unit up. Wonder if they will still give you the $75.00 core charge back if you do open the MAF up? Thanks, Ken |
#3
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Wow, this is a first for this group, no responses at all. I guess I'm on my own this time. AutoZone said their computer would not tell me anything unless my check engine light is on. It is not on. I start my truck if it idles rough, I shut it off and go tap on the IAC, restart and it runs fine. Looks like I will have to replace the IAC. I will also check to see if I can buy the special screw driver required to open up the MAF so I can clean that also. If anyone has anything to add, I would appreciate it very much. Thanks, Ken "Ken" <kenfromtn (AT) hotmail (DOT) com> wrote in message news:B_8Na.657$Uw5.352 (AT) newssvr16 (DOT) news.prodigy.com... "Ken" <kenfromtn (AT) hotmail (DOT) com> wrote in message news:ZddMa.87$t62.0 (AT) newssvr19 (DOT) news.prodigy.com... Hi Group, 1999 Ford Ranger 4 cyl., 5 speed man.,105,000 miles, I have put every mile on it. At 104,000 miles put in new plugs & plug wires (1st time), air filter, fuel filter, PVC valve (2nd time). I was beginning to have a very low idle RPM, which would cause the truck to stall, it was getting worse so figured it was due for a tune up. The truck ran smooth otherwise. Since tuning the truck up the very low idle RPM does not happen all the time only every once in awhile, very random. Some days it runs great all day, other days it idles poorly all day, some days it comes and goes. If there was a way to set the idle RPM I believe my problem would be solved, but the computer controls all that, the truck does not have a tach so I can't give you a RPM number. The truck passed emissions testing no problem after the tune-up, it was idling fine when I went for the test. It has never failed the test before. Anyways what could cause this very random idle RPM problem? If I took it to Auto Zone and had them hook their computer to it would that tell me anything? Thanks for any ideas. Ken Hi Group, Just wanted to let everyone know what I have found so far. On another discussion board someone suggested tapping on the IAC solenoid, which I did with the plastic end of a screw driver, started the truck up and everything was idling just fine. So does that mean the IAC is bad? Or do I just tap on it when it acts up again? The IAC is $111.00 from the Ford dealer. Also found someone suggesting cleaning the MAF sensor, helps with idling and pinging problems. The MAF is $187.00 from the Ford dealer, with a $75.00 core charge. I did notice that the MAF has a drop of glue or solder on one of the torx screw heads, and the other screw head has a small post sticking up so you can't use a regular torx screw driver, so I guess they don't want you opening this unit up. Wonder if they will still give you the $75.00 core charge back if you do open the MAF up? Thanks, Ken |
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