Question about 1999 GMC Jimmy

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Changed fuel pump and still won't start

Car wouldn't start and put new fuel pump on and new gas and still won't start?

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  • GMC Master
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Have you checked the fuel pressure at the injector ? It has to be at least 60psi for the engine to start.

Posted on Dec 08, 2012

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

isaid
  • 302 Answers

SOURCE: Have installed new fuel pump and gas lines in 1995

pull line off of front of filter and cycle key 2 on position if there is no fuel present your feul pump may b the problem, before replacing old one make sure the fuse is good

Posted on Oct 06, 2009

  • 202 Answers

SOURCE: I have a 1996 GMC Sierra C1500. I'm totaly new to

A bad fuel pump will not keep the engine from turning over. I would first test your battery and make sure your connections are clean. If that check out I would check your starter and starter relay.

Posted on May 12, 2011

  • 202 Answers

SOURCE: My 2001 GMC Sierra just

When your replaced the pump did you replace the fuel filter? You may have a fuel pump relay causing you some grief. I believe it is located in the engine compartment in the fuse center on the left inner fender. Check the relay and any related fuses. Check the electrical connection at the pump. They had problems with some of them and they would get kind of hot and distort and corrode. They have new updated ones that can be easily installed.

Posted on May 15, 2011

  • 11 Answers

SOURCE: won't start fuel pump replaced new tank and

Nephew had similar problem on different vehicle - had spark to plugs, limited gas, everthing else checked. I did one thing first - check for two fuel filters - one in the tank was only screens and one in the line itself. Found a little in line filter just outside of engine compartment under car next to frame that looked like it had never been changed - partially clogged - replaced it.Almost ran but would not keep running. I had rotor and cap pulled - found that the screw holding rotor in place was loose. The rotor edge next to plug wire leads was chopped up and the cap's plug wire leads were heavily oxidized. Replaced them and got it running but a little rough. Pulled the spark plugs and found gaps from 25 - 100 ---replaced the plugs with correct gapping and it ran really well.

Posted on Sep 01, 2011

  • 450 Answers

SOURCE: 1994 gmc sierra. starts

check your mafs buy a can of mass air flow sensor cleaner.and spray it on the air by pass

Posted on Sep 08, 2011

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Hello. My 1997 Chevy Tahoe refuses to start. The problems began with a bad fuel pump. I changed. It worked. The fuel pump died again. I changed it again and it has been working. I parked it for two weeks....


Now you have a good battery & a starter that turns over the motor

Have you cycled the key on & off with a fuel pressure gauge on the
fuel rail?

Do you have a fuel filter that isn't over 3 or 4 years old?

Have you checked for spark while cranking ? Use an old plug on the wires,
if you have ignition wires,don't ground the wire without resistance

If you removed the ducting & MAF Sensor it won't start

Tell us what you checked & exactly how that was done.

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