It has the 350 k1500 4x4, this truck always starts and nevers stalled,.. just happened with no warning, I went to start it and it didn't want to start so I pressed the gas pedal a couple of times and cranked it over again it started rpms go up a little then 2 secs later it stalls, if I feather the gas I can keep it running,.. had my father in law look at it he said it was the fuel pump because he did a fuel pressure test with 8lbs of pressure, so he replaced the sending unit and pump figurd that would fix it, Now when I start it the it will idle for the most part by it self, the rpms go between 500-1000 and if I try and give it gas and bring it to 2000 rpm and hold it there it will slowly die out and stall also if I turn on the headlights, press the brake lights, put the heater blower on, etc it will die out. So at this point I have no idea. thanks in advance for any help
93 Suburban Stalling
Nov 21, 2007
6 Replies
Did you replace the fuel filter as well? Does it hold pressure with key off?
Whitelightning
Yes the fuel filter has also been changed,(that was the 1st thing) we haven't checked to see if the pressure holds since the filter,sending unit and pump have been changed but we can check it
It sounds like the alternator isn't charging. Does the battery read above 13 volts when the engine is running? If the voltage is low the pump can't make enough pressure.
Tinker
haven't checked the voltage on the altenator, but they where (battery and altenator) just 2 months ago
I thought the same thing especially when the OP said if he turns on the heater, headlights etc... the engine dies. However it does have enough voltage to start and that should be enough for the fuel pump right?
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