Stalling at stop

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Mar 9, 2004 | 04:59 PM

RichVollberg

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Stalling at stop

I have a 89 bronco with the 5.0 EFI. I dont have a check light on but i did a code test just to see, the only thing that i can get to come up is a koeo code of 67 no other tests work as far as continous codes. The idle rpm is fluctuaing from about 480 to 600rpm with an average staying around 550 or just below in neutral. This seems low to me. Ive replaced the O2 sensor, Plugs, wires, coil, Ign module in the distributor, Cap and rotor. Im at a Loss 6 months ago i did replace the low pressure pump in the tank. And the ign module died a few weeks ago but this was going on before that. Any idea's on what to check, without codes im at a loss as to what part to look at next. P.S. all vacume lines apear to be in good shape so I dont think its a vacume leak.

Rich Vollberg

Mar 9, 2004 | 05:08 PM

Jdenninger

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From: Buffalo, NY

Check your TPS. the idle speed is too low. check this thread:

https://www.ford-trucks.com/forums/s...2B%25252Bspeed

Mar 9, 2004 | 07:44 PM

aglpml

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From: Cheyenne, WY

try the idle air valve. Mine was idling at 2500 rpm and the TPS voltage checked good (easy to do with a digital multimeter).

I can e-mail you a picture of how I checked mine

Mar 9, 2004 | 07:53 PM

RichVollberg

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TPS is now top of the must check list. Thanks for the info. Mines a 89 eddie bauer by the way.
Red with Tan.

Mar 9, 2004 | 07:59 PM

aglpml

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From: Cheyenne, WY

I uploaded pictures in my gallery of the TPS and idle air valve

Mar 9, 2004 | 09:05 PM

RichVollberg

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thanks for the help good shots to. Im off to the parts store tomarrow.

Mar 9, 2004 | 09:23 PM

Mary_Kate_Olsen

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From: Vermont, USA

I had a low idle & stalling and stop problem. Traced it to the EGR valve getting stuck open intermittenly. Try cleaning yours out with throttle body cleaner.

Or to check to soo if the EGR is the problem you can use the dime in the EGR tube trick to permantly close the EGR valve. If your idle should increases when you do this then you found the problem.

Last edited by Mary_Kate_Olsen; Mar 9, 2004 at 09:25 PM.