No spark no injector pulse

[jackass1000]

Have an 84t-type no spark no injector pulse after installing 87 wireing harness checked all fuses flowed no start tree said bad module or crank sensor tested modules tested good replaced crank sensor checked all grounds put stock computer in no diff car ran fine with 84 harness changed harness because was cut and spliced have fuel press any and all sugg welcome.please help thank you.

 

[Scott87]

Check to make sure that you are getting power to the ecm? No power to the ECM will prevent injectors from pulsing.

 

[berserker6]

sub

 

[jackass1000]

if i key it up 3 times injectors will pluse once but no start

 

[TurboBuRick]

With key on check for power at the ecm, injector harness, and ignition module.

Pink and black wires should all be hot.

 

[jackass1000]

yes i have power at ecm and injectos and mod

 

[jackass1000]

still cant get it going HELP!!

 

[TurboBuRick]

You do have fuel pressure?

There are two pnk/blk wires on the module. Both should have 12vdc with key on.


When checking power at the ecm, use the ecm case for your ground. This will assure the ground circuit for the ecm is not open.

 

[jackass1000]

yes i have fp mod has powre and case ground

 

[TurboBuRick]

What about power and ground at the cam and crank sensors?

I would test the wires on the cam and crank sensors. Ohm the ground back to the engine block. Then move to the signal and power wires. Ohm them back to the module plug.

Here is the ecm pinout and diagram. Scroll down and you will see the module pinout as well. ECM Connectors


HTH