So I'm wondering if anyone has had this problem...I've gotten to the point where, if I had hair, I'd pull it out.
The truck...a 1994 5.9L Gas motor, 2WD, Auto.
The problem...First thing in the morning there is no problem. 16 miles to work and it runs great. On my way home, when it's hotter, I get about 13 miles and the motor starts to stumble and then dies. Sometimes I can get it to stumble along the last 3 miles to the house, sometimes I can't. Once it dies, you have to wait and hour then it starts right up and runs like a just as well as it always has.
What I've tried...I have so far changes the distributor cap, rotor, distributor pickup, coil, spark plugs, fuel pump, and fuel cap. I've taken it to two local mechanics, both of which say they "cannot duplicate the problem", probably because they don't drive it when it's hot outside.
Discuss...
(thanks,)
Terry
The truck...a 1994 5.9L Gas motor, 2WD, Auto.
The problem...First thing in the morning there is no problem. 16 miles to work and it runs great. On my way home, when it's hotter, I get about 13 miles and the motor starts to stumble and then dies. Sometimes I can get it to stumble along the last 3 miles to the house, sometimes I can't. Once it dies, you have to wait and hour then it starts right up and runs like a just as well as it always has.
What I've tried...I have so far changes the distributor cap, rotor, distributor pickup, coil, spark plugs, fuel pump, and fuel cap. I've taken it to two local mechanics, both of which say they "cannot duplicate the problem", probably because they don't drive it when it's hot outside.
Discuss...
(thanks,)
Terry
Hall Of Fame
welcome to DF. the key question when it won't run is - are you losing spark, or fuel, or both, or neither.
this takes 2 people (or night time), but stick a spare plug in the plug wire, ground it (and don't touch it) and crank the motor over and see if you have spark. also use a volt meter and check for 12 volts at the coil.
there's a relay called the ASD relay. i don't know much about how whether its turns on to kill the engine or turns off to kill the engine, but look into that, and see if you can swap that relay.
check for fuel by pressing the fuel test port on the rail. cover it with a rag because its high pressure. don't smoke and don't catch the truck on fire. fuel pump might be stopped up, or it might be getting hot and shutting down.
this takes 2 people (or night time), but stick a spare plug in the plug wire, ground it (and don't touch it) and crank the motor over and see if you have spark. also use a volt meter and check for 12 volts at the coil.
there's a relay called the ASD relay. i don't know much about how whether its turns on to kill the engine or turns off to kill the engine, but look into that, and see if you can swap that relay.
check for fuel by pressing the fuel test port on the rail. cover it with a rag because its high pressure. don't smoke and don't catch the truck on fire. fuel pump might be stopped up, or it might be getting hot and shutting down.
Well, it's definitely a fuel problem. When it's "dead", you can spray a combustible liquid in the throttle body and it'll start for a moment.
If the fuel pump is overheating, what could be causing that? Seeing how the pump is new and the fuel filter comes installed in the pump...
The dealer tech that I talked to on the phone suggested that the fuel pump I got from AdvanceAuto is the problem. He thinks that if I put a Chrysler pump ($600) in it the problem would be solved. Doubt it.
If the fuel pump is overheating, what could be causing that? Seeing how the pump is new and the fuel filter comes installed in the pump...
The dealer tech that I talked to on the phone suggested that the fuel pump I got from AdvanceAuto is the problem. He thinks that if I put a Chrysler pump ($600) in it the problem would be solved. Doubt it.
Hall Of Fame
Quote:
easy for him to say. its not his $600 damn dollars.Originally Posted by Judasbot
The dealer tech that I talked to on the phone suggested that the fuel pump I got from AdvanceAuto is the problem. He thinks that if I put a Chrysler pump ($600) in it the problem would be solved. Doubt it.
ask him if he'll cut off his finger if it doesn't fix the problem..
that's always freaks them out..ok -so you've zero'ed in on fuel.
the next big question is - are you getting power to the pump?
follow the power through the ASD relay, and find a way to test for power at the pump itself. ASD relay might be failing. or PCM might be dropping power.
have you got a test port on your fuel rail drivers, side.
i'm assuming your truck did this with the old fuel pump too, and the new Advance pump is acting exactly the same.
The best I can tell, yes the pump gets power.
The ASD and Fuel Pump relay are checking out according to the Voltohmeter tests mentioned in the Haynes manual.
Like I mentioned...in the morning the thing runs like a scalded dog. I has all the power you want and never stumbles.
The ASD and Fuel Pump relay are checking out according to the Voltohmeter tests mentioned in the Haynes manual.
Like I mentioned...in the morning the thing runs like a scalded dog. I has all the power you want and never stumbles.