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98 GMC sierra wierd starting patteren
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doityourselfguy
New User
Feb 14, 2009, 10:59 AM
Post #1 of 6
(2458 views)
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98 GMC sierra wierd starting patteren
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I have a 98 gmc sierra sle pickup. with a 4.3 vortec v6 engine. the problem is that i can start the truck everyday without any problems and then out of the blue it will not start i will keep trying to start it and then wait a few min. and then it will start right up i had it at the repair shop and they hooked everything possible and could not find what was wrong. the truck will just keep cranking but nothing. can you please help to find problem.
(This post was edited by doityourselfguy on Feb 14, 2009, 11:40 AM)
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dmac0923
Enthusiast
Feb 14, 2009, 11:15 AM
Post #2 of 6
(2455 views)
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Re: 98 GMC sierra
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when it doesnt work/start what is it doing??? just cranking and cranking but never turning over or are you not getting any response from the key at all or do you hear clicking liek a dead battery???
your going to have to try to be a little more descriptive.
first step off the bat......is to clean/inspect/tighten your battery terminals/cable ends.
__________________________________________________
2015 Jeep Grand Cherokee
2002 Ford Ranger
2004 Toyota Corolla
1969 Ford Mustang Mach 1
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doityourselfguy
New User
Feb 14, 2009, 11:17 AM
Post #3 of 6
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Re: 98 GMC sierra
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it just cranks and then i wait a few and it will start up
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Loren Champlain Sr
Veteran
/ Moderator
Feb 14, 2009, 11:59 AM
Post #4 of 6
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Re: 98 GMC sierra
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Have them do a fuel pressure test. Also, have them check for pressure bleed-off after the engine is shut down.
(I'm assuming that the filter has been replaced, already) The 4.3 Vortecs need 55psi to even start. Sometimes, you can build enough pressure to start by cycling the key on/off several times (5-10second intervals). If the pressure is bleeding off, it has to 'prime' itself each time. Then, need to find out where it is bleeding to.
Loren
SW Washington
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cpaine0106
User
Feb 14, 2009, 7:01 PM
Post #5 of 6
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Re: 98 GMC sierra
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the 4.3L engines (vin code W) have a tendency to develop a fuel leak inside the plenum. If it does turn out to be pressure bleeding off, this is a likely location if you can't find a pressure loss anywhere else. Now, I'm not saying to start replacing parts, that could get expensive real quick. Definitely follow proper diagnostic procedure before replacing parts. I just wanted to throw that info out there because it is a very common occurance
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Loren Champlain Sr
Veteran
/ Moderator
Feb 14, 2009, 7:40 PM
Post #6 of 6
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Re: 98 GMC sierra
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cpaine; You are absolutely right on! Is, more than likely, the problem. Welcome to the Forum.
Loren
SW Washington
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