Won't start / Weak injector pulse

[AXXE]

Motor and turbo are finally in. I tried to start it and there is no fuel. Pump is working fine and there is pressure. I put a noid an injector plug and the pulse is very weak. What would cause this? TIA

 

[ed hess]

>>> put a noid an injector plug and the pulse is very weak.<<<

what the heck is a noid.

You say no fuel, if your seeing dead zero on the gauge. undo the lines and find the blockage.

distributor isnt off 180 degrees.

left the rotor out

grounds are all on

all 12v+ are back on the alternator stud

both plugs are fully seated on back of distributor

do you get fuel useing test connector.

ecm b fuse is in.

starting out simple here.


ed

 

[Captain Morgan]

>>> put a noid an injector plug and the pulse is very weak.<<<

what the heck is a noid.

You say no fuel, if your seeing dead zero on the gauge. undo the lines and find the blockage.

distributor isnt off 180 degrees.

left the rotor out

grounds are all on

all 12v+ are back on the alternator stud

both plugs are fully seated on back of distributor

do you get fuel useing test connector.

ecm b fuse is in.

starting out simple here.


ed

Ed, a "noid" is a light or diode that you plug into the injector socket to diagnose if there is an injector pulse or not.

He said the pump was working and he was getting pressure, so that would rule out a lot of the things above. Even if he was getting poor pressure, it would still sputter and try and start.

I would check all the grounds like Ed said and if you havent already, pull a plug or 2 and see if they are wet.

I know its not gonna be the greatest thing for it, but have you tried to get it to fire on a little bit of starter fluid just to see if it would kick???

Unplug and check all the connections at the ECM, including checking for bent or damaged pins.

Let me know if you need any help, maybe I can run up there one evening and give it a peek.

 

[SY2932]

Bad ignition module or ignition pick up are at the top of the list if everything else is ok (grounds, power, cap and rotor installed correctly etc.). I know because I just fixed this problem on my truck less than a week ago :-? . Turned out to be a bad ignition module in my case. Not getting a reference pulse will keep the injectors from firing. HTH's

 

[AXXE]

I checked it for spark. That was ok. The injector pulses are just very weak. I am thinking something like a bad ground. Plugs are not even wet after cranking. This thing is driving me crazy. I am going to let my dad take a look at it now.

 

[AXXE]

Taken care of. One of the connections from the ATR battery relocatioin kit came loose. I guess I am getting delerious and starting to miss the simple things.