QuestionI have a 1996 Dodge Dakota 4WD Truck, 3.9L V6 Fuel injected, 70K miles.
It has recently developed a stalling problem, when warm, when the accelerator
pedal is released. It also has a problem starting when the engine is warm. It does not
miss or have any obvoius loose vacuum hoses. Until this problem started, the truck has
run well and has not had any engine performance problems. As a DIY mechanic, I own
a repair manual, and also did some internet searching for some insight. I found that
defects in the O2 Sensor, Automatic Idle Speed (AIS) Motor, or MAP Sensor might be the
cause.
Today I bought a Scan Tool (not just a reader) thinking it would point me to the
defective part. (I should note that the "Check Engine" light never illuminates except
at start up) The scan tool reports "No Faults Detected" as well as "No Freeze Frame
Detected". I'm thinking my next step is to drop the fuel tank and replace the fuel
filter/regulator assembly. I don't want to go to all of that trouble though, if you
can think of anything else I should check.
Thank you for your time and any advice.
AnswerTodd,
Usually an o2 sensor will make the engine light come on.Does this truck have a fuel filter on the frame?If so it will be on the drivers side.If it's stalling it's more than likely a fuel issue.It is a lot of trouble but i would try changing the fuel filter if it doesn't have a frame filter.It's very hard to diagnose these kind of problems if the engine light is not on and you've checked all vaccuum lines etc..
