newb needn help

got mud? · Dec 11th, 2005, 12:12 AM

ive got a 88 nissan 4x4 truck w/z24 motor all my problems started when i was going to work this morning and any more than half throttle my truck will cut out and backfire untill i let off the gas im not sure where to look other than i know its not the valves,timing chain and gears,plugs ,plug wires,fuel filter or air filter because i relaced all of this when my head gasket blew i also had the head cleaned and surfaced when i had the new valves and seals put in any help would be great i also was checking my coils and found the exhaust coil doesnt fire as much as the intake coil but im not sure how much spark it needs being its the exhaust side HELP PLEASE I MISS MY TRUCK

Will · Dec 11th, 2005, 07:33 AM

With all the new stuff you have on/in the motor it could be something as simple as moisture in the gas tank. Many times it won't effect the motor at idle but when you accelerate it(moisture) is activated. If it gets in your fuel supply system it will also contaminate your fuel filter. Sometimes simply adding a couple of bottles of dry gas will remedy the problem. If there is a greater amount,the tank has to be drained and dried.

got mud? · Dec 11th, 2005, 11:38 AM

thanx ill try that i was going to fill the tank up today any how

got mud? · Dec 11th, 2005, 10:26 PM

well i tried draining the tank and put all new gas in today with 2 bottles of dry gas and still got the same prob ant other thoughts?

dvdswanson · Dec 11th, 2005, 10:39 PM

Quote:

Originally Posted by got mud?

ive got a 88 nissan 4x4 truck w/z24 motor all my problems started when i was going to work this morning and any more than half throttle my truck will cut out and backfire untill i let off the gas im not sure where to look other than i know its not the valves,timing chain and gears,plugs ,plug wires,fuel filter or air filter because i relaced all of this when my head gasket blew i also had the head cleaned and surfaced when i had the new valves and seals put in any help would be great i also was checking my coils and found the exhaust coil doesnt fire as much as the intake coil but im not sure how much spark it needs being its the exhaust side HELP PLEASE I MISS MY TRUCK

What do you mean by the exh coil doesn't fire as much as the intake? I would think they would fire the same, each firing for each cylinder.

got mud? · Dec 12th, 2005, 10:34 AM

the ign coil has a much stronger and brighter spark then the exh. coil
i dont know if this is normal or not if some one else in here has a z24 motor could look and see how much theirs fire then that maybe my prob