My 97 Venture 3.4L is difficult to start after it has been operating. First
thing in the morning, it starts up fine. Later in the day, when attempting
to start the vehicle, it is difficult to start. The vehicle has 95K
miles...the wires and plugs have not been changed. Could I have a weak
crank positioning sensor? I seem to recall that replacing it on 2 other GM
vehicles seemed to correct a starting problem. One other important point,
at no time has the Check Engine Light come on, to indicate a problem with
the ignition/fuel system. Is my problem simply plugs and wires? Any help
is greatly appreciated. Thank you, Joe
At 95,000 miles, that is certainly one of the very first things I would do.
Crank sensors don't usually display hard starting symptoms. More often the
engine simply quits for no apparent reason.
When your vehicle acts like it's not getting fuel, and you haven't
changed the plugs and wires in many tens of thousands of miles...that's
the very first thing you should do. It would probably be a good idea to
change your fuel filter as well, since you're getting on up there in
years and miles.
I'd do an oil change and dump in some injector cleaner to polish it off,
too. It never hurts, after all...
When I changed the fuel filter on my Beretta, the fuel that spilled out
of the tank side of the filter was dark brown. I'm glad I did it--but
it didn't stop my fuel pump from burning out anyway, because the stress
on the pump was already done.
If plugs and wires don't do it, it's time to start poking sensors *groan*
Thank you for the reply. I plan to change the plugs and wires and report if
it improves warm starting. I have changed the gas filter already.....I will
also add fuel injector cleaner, to see if that makes any improvement. The
vehicle is due for an oil change, so I will change it as well. Thanks
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