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Run decent but no right
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Posted on Jan 02, 2017
These 4.3L W motors are common for fuel leaking inside the plenum causing them to run rough and smell like raw fuel. The fuel pressure regulator leaks internally, also the injector spider leaks and the two fuel lines feeding the fuel to the spider. You have to remove the plenum and look for the clean spot. Where the fuel leaks it cleans the oil off. Before you try this check your EGR valve. The EGR valves on these get stuck open with carbon and cause a rough idle. Remove it and look for the plunger it is a small round piece that you can push in and out, make sure it closes fully. You can also clean it with carb clean and they make a replacement gasket with a screen in it to keep chunks out of it. Start with the EGR because it is easier. The parts for under the plenum are available at most any parts store. If you have any problems just ask, and if you can not find the parts I will give you part numbers. Let me know what you find I will be back tomorrow.
Posted on Jan 07, 2009
Sounds like a bad fuel injector. Shop would need to run a contribution test to confirm. I must say, good detective work, good luck.
Posted on Apr 29, 2009
SOURCE: fuel pump will not run
THERE IS A FUEL PUMP SHUT OFF SWITCH(INERTIA) ON THE PASSENGER SIDE KICK PANEL.INSIDE CAB UNDER DASH.IT INTERUPTS POWER TO THE PUMP IF U ARE IN A COLLISION.PUSH THE RED BUTTON ON TOP OF IT.IF THAT DOES NOT WORK CHECK FOR POWER IN AND POWER OUT.NO POWER OUT BAD SWITCH.NO POWER IN OTHER PROBLEM
Posted on May 05, 2009
I have a question. Turn the ignition on you should hear the pump for about 3 seconds. then it should stop. this is normal operation. then when a signal is sent to the ignition that you are going to crank it then it switches on. I can see how this can seem like the pump is not working but after you crank it you should be able to hear the pump for about 1-1.5 seconds after the crank then it will stop. The pump will not turn on until it is told to do so by the computer.
Posted on May 25, 2009
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