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.........how i can test pressure when the truck wont even run? Help
In that case it would probably be best to remove the fuel pump relay and then insert a jumper wire to temporarily run / test the pump.
Similar to this post here.....
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http://www.gmt400.com/threads/how-to-bleed-6-5l-fuel-system.13943/
The book (if there is one) would probably recommend a "fused" jumper.
Could a clogged fuel filter cause a no start ? Like good fuel pump pressure when engine is not running, but not enough fuel flowing when needed.
IIRC, there may be a proceedure for opening the fuel line (by removing the filter) and connecting a flexible hose to direct the fuel into a container so that the flow (gpm) rate can be measured.
FWIW, 1998 had passlock security which disables the inectors, the symptom would be more like, engine starts fine and then abrubtly stalls after 2 or 3 seconds, the "Security" light in the upper right hand corner of dash would be illuminated or flashing.
Food for thought, best of luck.
In that case it would probably be best to remove the fuel pump relay and then insert a jumper wire to temporarily run / test the pump.
Similar to this post here.....
You must be registered for see images attach
You must be registered for see images attach
http://www.gmt400.com/threads/how-to-bleed-6-5l-fuel-system.13943/
The book (if there is one) would probably recommend a "fused" jumper.
Could a clogged fuel filter cause a no start ? Like good fuel pump pressure when engine is not running, but not enough fuel flowing when needed.
IIRC, there may be a proceedure for opening the fuel line (by removing the filter) and connecting a flexible hose to direct the fuel into a container so that the flow (gpm) rate can be measured.
FWIW, 1998 had passlock security which disables the inectors, the symptom would be more like, engine starts fine and then abrubtly stalls after 2 or 3 seconds, the "Security" light in the upper right hand corner of dash would be illuminated or flashing.
Food for thought, best of luck.
Im guessing if the fuel pump doesnt run while jumper is in then fuel pump is bad
You could try giving the tank a few love taps with a dead blow hammer and see if the pump comes on. Sounds like that's your problem either way though.