93 gmc cranking problems

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charles watkins - 21 Nov 2005 01:02 GMT

4.3 throttle body . when truck sits over night or for a very long
time . starter has turn mtr. over way to long to start . have changed
fuel pump and pressure regulater nothing has helped so far . need help
bad

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Steve Mackie - 21 Nov 2005 02:20 GMT

Try an injector cleaning.

> 4.3 throttle body . when truck sits over night or for a very long
> time . starter has turn mtr. over way to long to start . have changed
> fuel pump and pressure regulater nothing has helped so far . need help
> bad

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plainoldmechanic - 22 Nov 2005 02:48 GMT

next time you go to start try and un -plug one of the two injectors on
top of the throttle body. after it starts plug it back up---let me know
if this makes for an easier start and we'll work from
there...............

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jdl - 22 Nov 2005 18:39 GMT

You did check fuel pressure before you replaced anything, right? What was
it? What is it now?
You did get a new strainer and filter, correct? Is it a fuel pressure
issue?

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cfoughty@gmail.com - 22 Nov 2005 21:37 GMT

If the previous advice doesn't work, then check the rubber fuel line.
If it is cracked or has a pin-hole leak it allows air into the fuel
line. Then you must crank it for awhile to push the air out and build
up fuel line pressure.

Just a thought.

Allways look for the weakest point in any system, and then start
troubleshooting at that point.

Hop it helps,

Cy

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