2002 S10 4.3 Fuel Issue


Asked by Aug 15, 2016 at 02:48 AM about the 2002 Chevrolet S-10 3 Dr LS Extended Cab SB

Question type: Maintenance & Repair

So a few weeks ago I was pulling up to a
stoplight and as I came to slow down I got
to about 5 MPH and the truck just shot off,
thought it was because I was too low on gas
or a bad battery, but nope. Seems like the
truck will only attempt to run when cleaner is
sprayed into the throttle body. Started with
replacing the fuel filter then called my bro
over to have a look at the truck. We
discovered when I took out all the spark
plugs that they were blackened and sooted.
cleaned them off and reinstalled them.
Same thing.. so we rented the million dollar
pressure gauge from autozone. Tested near
the engine Schrader valve and didn't get any
pressure reading at all. So we tested it by
the fuel filter, and we were only able to get
the Guage up to 5 psi (not 60). So we quickly
assumed that the fuel pump was the culprit.
Ordered a new one and installed it but the
truck still don't want to start. Still tried to run
when cleaner was sprayed in the throttle
body. I'm all tapped out from fixing this truck
so really have no more money for it. So
today I pulled the intake to get into the
plenum. No real signs of leaking near the
injectors, they all look normal wear, dirty but
dirty good in a fuel case right? I pulled off
the regulator that piggy backs the injector
and planning to replace it. I really hope it's
the problem coz I don't got the 300 for a new
injector. Seems like gas got all the way up to
the injector and is either flooding the the
system or not applying gas at all. Could it be
the regulator took a shit?

1 Answer


UPDATE : The problem is fixed! It ended up being the Crank Position Sensor. Just replaced this less than 9 months ago but I have to mention I've had a couple fender benders during the time which can also cause this to go bad. If you take the sensor off and it has a gouge on the end of it, replace it immediately. This left me stranded with a tow and 3 weeks trying to figure out wtf happened. Too seldom I see people never follow up on their posts and I don't want this to happen to anyone else.

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