express 3500 chevy van tries to start but doesnt. when cranking stopped the engine rumbles. getting fuel can smell it.
I would start my search for commercial truck parts at wholesale with www.FindItParts.com. If that doesnt work then try www.tradekey.com.
Low battery.
you should try to poo in it
Try graphite or lock lubricant
could be that your truck doesnt have a strong enough cold cranking amperage Not sure what year and make truck you have but in some vehicles if the engine coolant sensor fails it can have those symptoms.
Meby you should try starting a convo with him
It depends, you could try starter fluid.
Weak battery or starter motor shorted out internally.
bleed the fuel and then start or manualy fill the new fuel filter and then try it
try disconnect the battery 4 about 10 min's then try it if it doesnt work take it to a shop
try an alternator
Try adjusting your pedal