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  #1 (permalink)  
Old May 15th, 2008, 01:20 PM
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How does a faulty Fuel pump act? My car seems to hesitate/buck now and it happened right after trying to fix the fuel pump..



Thanks.
Last edited by 86gndave : May 15th, 2008 at 02:14 PM.
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Old May 15th, 2008, 03:33 PM
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What exactly did you do? Do you have a FP guage to observe at idle and under WOT?
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Old May 15th, 2008, 06:20 PM
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filter
Quote:
Originally Posted by 86gndave View Post
How does a faulty Fuel pump act? My car seems to hesitate/buck now and it happened right after trying to fix the fuel pump..



Thanks.

Had a clogged fuel filter do that to me once in a '89 chevy PU, start with the simple stuff
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Old May 16th, 2008, 10:01 AM
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I changed the fuel filter 2 month ago, and the car was in repair, i only played with the fuel pump to try to fix the gas gage, but there was wires that were needed to be weld dont know if that did something to it. It dosen't work still
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Old May 16th, 2008, 11:15 AM
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pump noise
when you turn the key to run does the pump power up? There is a lead right by the alternator (white wire with male connector I believe) hanging out of the plastic shielding. That is a fuel pump lead, connect 12V and the pump should run.
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Old May 16th, 2008, 06:02 PM
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yep, i hear it pump up. fuel pressure is 40.
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Old May 16th, 2008, 06:39 PM
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Quote:
Originally Posted by 86gndave View Post
yep, i hear it pump up. fuel pressure is 40.
So you got power to the pump, that's good. While the engine is running listen to the pump for a couple minutes, kneel down behind the bumper. It sould be steady no variation in pitch. If you hear any the pump could be bad or as you said faulty connections. A fuel pressure gauge would be much easier, you can mount one on the fuel rail or better yet get an extension from caspers and tape the gauge to the winshield. When the car bogs watch the pressure.
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Old May 16th, 2008, 06:46 PM
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I will do that, but could it be another problem?
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Old May 16th, 2008, 06:51 PM
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You bet, lots of things can cause those issues. I think some of the more common causes are the MAF or the coil but thats assuming you've taken care of the basic tune up stuff.
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Old May 16th, 2008, 07:12 PM
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Could be the coil, with the way its acting. Not sure..
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