1998 Chevy Truck Won't start in the AM

LSTOWE

MEMBER
1998 CHEVROLET TRUCK
6 CYL
4WD
AUTOMATIC
275,000 MILES

I have a 1998 4.3 vortex truck engine that won't start after sitting over night or when damp. Once I do get it started it starts fine for the rest of the day, sometimes it skips as it runs with what seems like a mushy accelerator, then other times it operates with a frim petal and runs great.I have replaced wires, new cam position sensor, and coil. Have not checked fuel pressure with gage but have pressed schrader valve and gas spews.I need Help!

Friday, September 12th, 2008 AT 10:07 AM

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

Check the routing of your coil wire, this quote is from the Tech bulliten on this problem.
"General Motors has decided to conduct a Voluntary Emission Campaign involving certain 1996-98 C/K and M/L model vehicles equipped with 4.3L (L35) engines. Some of these vehicles may have been built with the ignition coil wire (distributor to ignition coil) too close to metal brackets or transmission fluid fill tube (M/L van only). If the coil wire is too close to these metal objects, a condition of grounding out through the wire insulation and plastic conduit (arcing) may cause failure of the wires. Failure of the wires can lead to a stalling/no start condition and/or catalytic converter failure.
To correct this condition, dealers are to reposition the coil wire to assure clearance from metal brackets and/or transmission fluid fill tubes. "

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Friday, September 12th, 2008 AT 2:01 PM