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Username Post: PLEASE HELP ME WITH MY 1998 TRUCK!        (Topic#368544)
Posts: 2

Reg: 05-29-22
05-29-22 11:02 AM - Post#2841994    

I need help with a cranking problem that has turned into a money pit.  I have 98 Chevy 1500- 5.7L 4-wheel drive.  247K miles.
Two problems:  fuel and electrical.  Vehicle would bog and spit and sputter.  Did everything to resolve.  New fuel filter, new pump (even went as far as replacing the tank).  This seems to work for a while.  During all this vehicle was draining the battery constantly.  New battery and alternator and still doing it.  Mechanic shop could figure it out and recommended putting a cutoff switch at the battery to shut down the power.  I knew this wasn't fixing the short, but did it anyway.  All seems to work for a minute.
I can crank the truck.  Hits in like one second and runs like a top.  Next day nothing.  Crank and crank and it spits and sputters and does nothing.  Starter fluid sometimes will bring it to life.  Once running for about 30 minutes it may start to bog and leave me on the side of the road.
Next day it will crank first time.  I hate to get rid of a truck in pretty good shape over an electrical problem I'm thinking.  I've spent a ton on this thing and it's turned into a personal challenge to resolve.

Please help if you know what to do.  I will send you a personal thank you via Venmo!


Valued Contributor
Posts: 2583

Loc: Lake George, NY
Reg: 11-11-15
05-30-22 09:39 AM - Post#2842030    
    In response to Tommydog7575

Have you checked fuel pressure, you need 62 psi key on key off.

Frequent Contributor
Posts: 1411

Loc: Orlando Florida
Reg: 07-09-18
05-31-22 02:46 AM - Post#2842071    
    In response to Tommydog7575

You need a proper diagnosis with a proper scan tool. You've probably spent more money firing the parts cannon at the thing than getting the vehicle's problem identified.

People fear change because it threatens what they know, or what they claim to know.

Member #271 Senior Chevytalk Moderator
Posts: 25740
Loc: Austin, TX 78748
Reg: 05-09-00
05-31-22 11:29 AM - Post#2842085    
    In response to Tony1963

Probably the dreaded MPFI poppets are toast. If other things checkout, a new updated spider works great. I did a 4.3 Jimmy. It ran great after a swap.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


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