no spark on 84 GN

[TurboCajun]

its an 84 GN with 87 module and coil, I went thru the trouble shoot guide from Steve's site. after all the testing, it says to change the module. owner purchased a new one and was installed. no luck, today I went thru the whole check list again and its saying a bad module. here is what I found. I have crank signal from the crank sensor to the module but no signal coming out of the module to ecm. I looked around for something that would control the module not to send the signal but no luck. any ideas guys are did we just get a bad module out the box?

[Steve Wood]

do you have voltage on both the power feeds?

[TurboCajun]

yes everything checks  out except for the signal that goes to the ECM

[Steve Wood]

pull the coil/module off yours and see if that works...afterm arket modules are often flaky-particularly the Wells brand

[Steve Wood]

also be sure it is bolted down to the bracket and the bracket to the back of the intake as this is the module ground

[TurboCajun]

One thing I said I did not want to do is take parts from my car. but I may have to

[TurboCajun]

part is a BWD from pep boys

[Steve Wood]

swapping parts like the coil/module is about as simple as it gets and it saves a ton of time...

[tb3]

I remember years ago powdercoating my ignition module bracket on my hot air.
no worky until I grounded it with a bonding braid

[Steve Wood]

I meant to ask him if it was bolted down...seen more than one that would not run because it was not grounded...gla d you brought it up

[tb3]

I meant to ask him if it was bolted down...seen more than one that would not run because it was not grounded...gla d you brought it up

I'm having trouble recollecting in my small brain, but I seem to remember a adapter bracket (usually sold by caspers) that allows the ic'd ignition module to bolt onto the hot air bracket, which means possibility of another grounding barrier, depending on how thick paint is, and if appropriate washers where used.

[TurboCajun]

question- put 2 new modules on the car and both are doing the same, going thru the trouble shoot it tells me that the modules are bad, he it is . key one I have power to the blue wire on coil pack , also have power to the other three wires when connected to the coil but not when i pulled them off, the blue,green,yellow wires on the opposite side are suppose to blink when cranking not be on constant. I also disconnect the crank sensor and they stayed on.

[Steve Wood]

does it have injector pulse when cranking?

[TurboCajun]

this is what i am dealing with

[TurboCajun]

I made a bracket to hold the module and also ran a ground wire for piece of mind,