2000 gmc p.u. won,t start - Engine Troubleshooting


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2000 gmc p.u. won,t start

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roscoebrowndog
Novice

Nov 14, 2010, 4:56 PM

Post #1 of 5 (2143 views)

2000 gmc p.u. won,t start	Sign In

i have 2000 gmc sierra there are only 78,000 km. on a 4.3 lt.v6 since day one whenever it was raining it would start to miss fire i could never see a pattern to it and it always stopped when the road dried out. last monday morning i parked at work[ i drive a truck] went on a short trip came back tuesday night the p.u cranked over
normaly but never sounded like starting i spent all next day checking plugs and sensors found one plug with a bit of corrision cleaned it then somebody said bang the fuel tank it started i drove home. the next day it would not start i can hear fuel pump when i turn the key i checked the relay for fuel pump and all fuses appear to be o.k. what next?

(This post was edited by roscoebrowndog on Nov 14, 2010, 5:35 PM)

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 14, 2010, 7:47 PM

Post #2 of 5 (2132 views)

Re: 2000 gmc p.u. won,t start	Sign In

Use a fuel pressure gauge on it. this is a high pressure system that requires a minimum of 55PSI to run. Nothing less is acceptable.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Sidom
Veteran / Moderator
Sidom profile image

Nov 14, 2010, 7:52 PM

Post #3 of 5 (2128 views)

Re: 2000 gmc p.u. won,t start	Sign In

You need to put a gauge on it and check pressure as HT suggested but if banging on the tank got it to start.......Odds are pretty high you have a bad fuel pump

roscoebrowndog
Novice

Nov 14, 2010, 10:21 PM

Post #4 of 5 (2123 views)

Re: 2000 gmc p.u. won,t start	Sign In

thank you for the replies i had about decided it must be fuel pump but it is not a small job and i needed to hear some else confirm i was on the right track

In Reply To

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 15, 2010, 3:44 AM

Post #5 of 5 (2118 views)

Re: 2000 gmc p.u. won,t start	Sign In

Nobody here said you have a bad fuel pump and you shouldn't be changing it automatically. We said to check the fuel pressure, not change parts.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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