No fuel???

[von Cube]

i get 12 volts off the one side of mine, but nothing off the otherside (the ground side), also, when i hooked up a liscence plate light, the light will flash, but still no fuel...wtf?

[anotherbaggeds10]

got the same problem

[tscustoms]

any idea on what it could be guys?

[anotherbaggeds10]

went out and wiggled some wires today and started good enough to fill my tank

[tscustoms]

i still cant figure out whats wrong with mine. i hooked my test light up to the ground side of the injectors and other end up to a 12 volt source and nothing

[tscustoms]

anyone?

[anotherbaggeds10]

try messing with the wires going to your ecu? i did that and mine fires right up

[lesterl]

Quote: Originally Posted by tscustoms

i still cant figure out whats wrong with mine. i hooked my test light up to the ground side of the injectors and other end up to a 12 volt source and nothing

Sorry man, gotta crank that sucker over to see if the ECM is pulsing the Injector(s), if the light flashes, you got a fuel/ injector problem, if it dont flash when cranking you have an ECM/Wiring issue.

[tscustoms]

i hooked a noid light up to it, no flash. could it be and ignition control module if i got 12 volts to one side and no ground on the other?

[anotherbaggeds10]

it could be, only take about 2 mintues to pop it out. had mine tested a few times and it passed. where ever you take it, the have to test it at least three times to make sure its not a false positive or negative

[lesterl]

Ignition Module or Possibly ECM

[tscustoms]

the control module is in the distributer isnt it?

[lesterl]

Quote: Originally Posted by tscustoms

the control module is in the distributer isnt it?

Should be in the Dizzy, the fuel injectors will have 12v on one side as it is hooked to B+ thru fuse and other side is pulsed by ecm to ground to activate injectors, so if no noid light flashing the ecm is not firing the injectors and you might have a bad ignition module or pickup coil, possibly bad ECM.

[tscustoms]

i appreciate all the help man. the truck starts if i put fuel down in the carb. can i take the control module to advance auto to get it tested

[anotherbaggeds10]

should be able to. you take the air cleaner off, then pull the dist cap. you may need to take some of the wires off but make sure you mark them. the ignition control module is black and sits under the rotor and is on the front side. it is like two small screws, i believe like 8mm and you take out and three clips that you unclip. be careful because they can break. take that out and take it to the parts store

[tscustoms]

thanks man, i havent been able to take it out yet, but is this what bit looks like?

[lesterl]

das it bro

[tscustoms]

im gna go get it tested today, ill let ya know if thats it

[tscustoms]

got it tested 4 times, it says its good. this thing as got me rattled.it ran one day, went back a few days later and nothing. any other ideas?

[anotherbaggeds10]

mine does the same thing. i play with wires under the dash and it will run for days

[tscustoms]

does the two wires that ground on the injectors go straight to the ecm

[anotherbaggeds10]

havent figured that out yet

[lesterl]

Back to ECM, Light Blue, Light Green Wire to connections Pins D18, D14 Red/White wires on injectors should go to fuse block ECM1 fuse thru a Pink/Black wire from some common connection point.

EDIT- Did you check for 12v on Red/White injector wires with ignition on? Wasnt sure you got that, if not may have to try an ECM. Did you test the PickUp coil in the distributor.

[tscustoms]

i got 12 volts on red/white wires and no ground when i crank. pickup coil is good and the ignition module is good as well. it started great the first time i went to restart it. i hooked up my headlights and taillights and went back 2 days later and nothing. my friend did hook the battery up backwards, but i caught it before i cranked it. i know the injectors are good because i hooked em on another truck and it started

[anotherbaggeds10]

yeah, i replaced my ecu and have 12v to the injectors. im still convinced it has something to do with a loose wire with mine, just have to trace it

[tscustoms]

i traced out my wires from the injectors to the computer and they are good. is there somewheres the computer gets it ground from to go to the injectors or is the computer itself

[lesterl]

as far as the ground on the computer side of the injectors it is not a constant ground but a pulsed on/off/on/off/on/off ground (will float high when off as 12v on other side of injector coil, will show 0v when activated since computer side will ground it out, happens real fast, best to use a noid light) Have you ohmed out the pickup coil yet? If it tests ok, probably your ecm, time to junkyard diving or pick one up somewhere else.

[tscustoms]

yea, i put a noid light on my injectors and no pulse at all. so i guess im headin to da junkyard. lol

[tscustoms]

how do i test the pick up coil? just put a meter on it? and it connects to the ignition control module dont it?

[lesterl]

Does the thing start with a squirt of starting fluid? If it does the ignition part of the ecm is doing its job and the p/u coil should be good? Something to try anyway, I would suspect ecm at this point myself.

[tscustoms]

it starts if i put gas on top of the carb

[lesterl]

should meter like a coil, low ohms, yes hooks to ign module

[tscustoms]

stupid question. my brother hooked up my battery backwards and i cranked it, could that mess up the ecm?

[lesterl]

Quote: Originally Posted by tscustoms

stupid question. my brother hooked up my battery backwards and i cranked it, could that mess up the ecm?

BACKWARDS? WTF, that should toast something as most electronics do have diodes across the power inputs to prevent damage from this, you may just have a lot of blown fuses, found many bad? Might have fried a couple other things, ECM may be ok, may not. Replace/ Check fuses and try cranking it over, maybe you fixed your original problem.