I'd replace the O2 sensor as a maintenance thing....but I'd say the fuel pump
was the culprit. Check the relay, all related wiring and if there's no
failures there, I'd change the pump.
In a message dated 10/17/00 9:27:05 AM Eastern Daylight Time, cwren@bju.edu
writes:
> I have a 1988 Dodge Dakota SE 3.9L V6
>
> My truck will drive fine most of the time but every so often it will
> just lose power like it is not getting any gas and shortly ther after
> die. Puahing on the gas peddle does nothing. The oil guage drops to 0
> and the low oil light comes on. Is there a sensor for that, that is
> killing the engine? If I try and start it back up it won't. Then after
> shutting it off for a few min. it will start right up and have no
> problems till the next time it stalls. When it does start back up the
> oil guage
> reades just fine. I've also noticed that the exaust is very sooty/oily
> on the tail pipe but I've changed the plugs, the fuel filter, the air
> filter, the oil and filter and no effect. The truck ran great after
> that but still stalled sometimes. Tried a high octane fuel, made it
> worse. The plugs don't look fowled like a dirty engine, maybe like a
> rich mixture. So that leads me to the O2 sensor, but will that cause
> the truck to stall and not start for a while? Since it has gotten
> cooler out, it has only stalled once in the last week and that was on
> Saturdy wich was a little warmer than it has been lately. Some
> sugestios say try the coolant sensor. I'm not sure if I have one on my
> truck. Some say clean the Throttle Body. I've put in at
> leat two bottles of Fuel Injector, Engine Cleaner and it helped for a
> time but keeps doing it. Some say change the SBEC or EGR, is that the
> main computer? What is an IAT sensor? Somebody took off their fuel
> tank and it was full of sludge, they cleaned it out and it was all
> better. Another sugestion was to change the throttle sensor, again I'm
> not sure if I have one and what it does. Sombody had the same problems
> and had the dealer change the "Harmonic something," a switch under the
> distributor. Slightly related to this, when I drive the truck on the
> highway at 65 for a period of time, when I come to an exit the truck
> will idle hard and stall at the bottom of the exit ramp. All I have to
> do is start it back up but it idles hard for a time. Any thoughts?
>
> Casey Wren
> cwren@bju.edu
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