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Dying while idle

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Old 06-09-2005, 12:38 PM   #1
nnorton44
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Dying while idle

I'm having a problem with my first-gen, a 1993 XLT. It just keeps dying whenever I am idling at a stop for a while, it doesnt happen all the time though. The engine will spudder and it feels like it is tryin to move while im on the brake. It then dies. Now this usually happens when I am below 1/4th tank but it recently happened at 3/4 tank. Every time it dies it starts right back up though. Any help appreciated.




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Old 06-09-2005, 12:50 PM   #2
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Idle Air Control (IAC) try cleaning that also clean the MAF(Mass Air Flow Sensor) those should help your problem.




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Old 06-09-2005, 04:23 PM   #3
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Possible vacuum hose fell off the tree coming off the intake.
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Old 06-09-2005, 04:31 PM   #4
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I agree with Chew.. most likely IAC problem... and cleaning the MAF can never hurt.
also might try scanning for codes.. just in case. Well, in my case, my CEL never comes on, and I had that problem with my Bronco2... I replaced the O2 sensor on it, and my dying-at-idle problem went away.
but of course, on these newer vehicles the O2 ain't so cheap, so start with the IAC and cleaning the MAF.




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Old 06-09-2005, 04:40 PM   #5
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"The engine will spudder and it feels like it is tryin to move while im on the brake." Could you explain that a little more. An engine dying and vehicle taking off at the same time!




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Old 06-09-2005, 05:38 PM   #6
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i'm not an expert on automatic transmissions, but it sounds like there may be something putting too much stress on the engine while at stop. You could see if that might be the case by putting it in drive and NOT pushing the gas pedal, just let it move at idle speed. If it does die when idle moving, you might have a problem with the tranny. THIS is the reason i drive a manual, always.




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Old 06-09-2005, 09:09 PM   #7
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Quote:
Originally Posted by Opera House
"The engine will spudder and it feels like it is tryin to move while im on the brake." Could you explain that a little more. An engine dying and vehicle taking off at the same time!
Actually its more of a shake, the RPMs will fluctuate and the car shakes and dies.




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Old 06-09-2005, 09:24 PM   #8
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Quote:
Originally Posted by hermitrl
Possible vacuum hose fell off the tree coming off the intake.
Sounds like a classic loose vacuum line to the idler, or a clogging fuel filter.




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Old 06-14-2005, 11:00 AM   #9
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This happend to me it was a servo in the throttle body.
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Old 06-14-2005, 01:37 PM   #10
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CAN

Sounds like a fuel pressure problem. Change your filter and do a pressure test.Maybe your FPR or vac to it.
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Old 06-15-2005, 10:20 AM   #11
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I had a problem with my '92 FPR when I was stopped at lights. Sometimes it would die, other times it would get a really bad shudder and then just clear up. Took a while to figure it out. Cut open the FPR and the valve seat was worn on just one side because of a spring that was off center. Sometimes the valve plate would slip off center and stick open. A rare failure that I found by monitoring pump current. Another symptom was occasional knocking on hills. If you have a meter, monitoring pump current is a good way to diagnose if this is fuel related.




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Old 06-15-2005, 11:38 AM   #12
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I have a similar problem that I need help with. I have a 92 Ford Explorer that dies at idle soon as it gets hot. This started a few weeks ago like this. After driving it for a while, then shutting it off for a bit, and restarting it, it would then die when idling. Thought maybe it was vapor locking. Always started right back up. Now it is dying every time it is at idle after it is warmed up. It still starts right back up. The fuel filter has been replaced, but its still happening. The truck runs fine while its moving, but as soon as I slow down in traffic or at a stop light, it dies. Help please
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Old 06-15-2005, 12:06 PM   #13
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CAN

Quote:
Originally Posted by LindaD
I have a similar problem that I need help with. I have a 92 Ford Explorer that dies at idle soon as it gets hot. This started a few weeks ago like this. After driving it for a while, then shutting it off for a bit, and restarting it, it would then die when idling. Thought maybe it was vapor locking. Always started right back up. Now it is dying every time it is at idle after it is warmed up. It still starts right back up. The fuel filter has been replaced, but its still happening. The truck runs fine while its moving, but as soon as I slow down in traffic or at a stop light, it dies. Help please
Your problem could be one of all of the above as well. FPR perhaps. That would be the first thing i'd check after the pressure and vacum lines. Make sure the FPR has a good vac source to it. Good luck
Peace
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Old 06-15-2005, 04:31 PM   #14
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Ok maybe problem solved with new IAC and throttle body cleaning. Now it will continue to run but after a few mins will idle down to almost a stall and then pick it'self up to normal idle without pedal magic. Little test drive coming up to see how things work out

Thanks for the help....
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Old 06-15-2005, 04:42 PM   #15
gavin
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did you reset the computer when you replaced the IAC? if not, that *may* help




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Old 06-15-2005, 06:06 PM   #16
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there is a line from the vacuum tree to the right side of the vehicle. One to the brake booster, another to what i think is the idler. there is a diaphram inline, and usually the tube falls off this diaphram. Check it man.




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Old 06-16-2005, 09:02 AM   #17
LindaD
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Well we thought we had it licked. Drove it a bit yesterday with no problems at all. Then it did the same thing while waiting in line at a drive through, started idling low, sputtering, then died when I pulled out on the street.
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Old 06-16-2005, 09:48 AM   #18
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Either the FPR or the fuel pump, if nothing else is visible would be my guess still. Do a pressure test.
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Old 06-16-2005, 10:27 AM   #19
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may also try the fuel pump relay....
similar problem in my Bronco2.. ended up hard-wiring a +12 to a switch that goes to the fuel pump from the relay (or maybe it was the starter relay)




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Old 06-17-2005, 07:05 PM   #20
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Gotta love my Ford....lol

Anyways took it to 3 shops to have tests run on it.
Shop #1: Did Fuel Pressure Test, and found it a tad high but not out of wack completely. Also ran a computer check and found only 1 code for the MAF sensor but said that it was because both the fuel pump and pressure reg needed to be replace along with a tune up because I developed fouled plugs from the above problems. Total bill was just under a grand for repairs if I did them. I asked him if he would spit polish it with all the spit I was spraying in anger as he was telling me .... no charge by the time I left.

Shop #2 Had it for a day and a half and couldn't find anything wrong with it. They ran the same tests as above plus ran most of my gas out by leaving it running to try and get it to do what I described.

Now totally frustrated and losing money from not working it was onto

Shop #3
Same as Shop #2

Of course as the old addage goes.... take it to a shop and symptoms go away. At all 3 shops, it never once quit running, sputter or anything. Of course tomorrow it will leave me high and dry in the hot Vegas desert.
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