1997 transport code 300

my van is showing a code 300 multiple missfires i changed all plugs and wires and didnt work. so i changed the cam sensor and the crank sensor. still nothing i checked the coil pack and ive got fire on them all but the spark looks week. it sounds like its out of time? the part store said that the coil packs cant be checked? but they checked the module and said it was good i think it a timing belt prob? but it sarts but shuts right down and bucks back and backfires out the intake.any help would be great. thanks paul

my van is showing a code 300 multiple missfires i changed all plugs and wires and didnt work. so i changed the cam sensor and the crank sensor. still nothing i checked the coil pack and ive got fire on them all but the spark looks week. it sounds like its out of time? the part store said that the coil packs cant be checked? but they checked the module and said it was good i think it a timing belt prob? but it sarts but shuts right down and bucks back and backfires out the intake.any help would be great. thanks paul

What are you getting in the way of MPGs?

itwasnt bad but wasnt good ill say avr 12 hw but it sas 130,000 miles on it thaks paul

itwasnt bad but wasnt good ill say avr 12 hw but it sas 130,000 miles on it thaks paul


You have a fuel problem, might be a bad fuel pressure regulator, sounds like the way to check is to disconnect the vacuum hose on your regulator and see if there is sucking, if not, you have to replace the regulator, also, when you open the fuel filler cap, you should hear the pressure release.

ill check that out but i can smell fuel when its back firing in the intake ill try what you said first. ill try anything at this point. ill let you know the out come thanks alot for the input. paul

i do have vacume to the fuel regulator vac hose on the top. i took the gas cap off and didnt hear any air. is there a way to have the reg tested thanks paul

on thr reg it self i dont have any vac. just on the plastic line thats on the top of it. thanks paul