CK5
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1989 gmc jimmy not getting spark
- Thread starter BAYBLAZER
- Start date
You've been reading Ryoken's post.
I don't think you'd get the spark at the coil of that was the case.
Your problem is narrowed down to the dizzy now.
And your pickup is fine and same is the ICM, so it's either the cap, the rotor or the wires.
Did you check the button on the rotor?
I just bought brand new wires and installed them.
The new distributor came with the cap and rotor and they look new?
I checked continuity from coil wire red and white to icm and ohms it checks out good.
What I'm trying to understand is why when i hook the coil plug wire to inline tester to ground negative terminal on battery or to exhaust bolt I get spark with key on and wires still connected. but then connected from coil plug wire to inline tester then to top of distributor cap there is no spark. Like there is no ground. When It still should spark? Right? All spark plug wires are new also.
What I'm trying to understand is why when i hook the coil plug wire to inline tester to ground negative terminal on battery or to exhaust bolt I get spark with key on and wires still connected. but then connected from coil plug wire to inline tester then to top of distributor cap there is no spark. Like there is no ground. When It still should spark? Right? All spark plug wires are new also.
so if im grounding it manually by connecting unplugging from coil to inline tester and then grounding to negative battery terminal that can be a factor? In this test i was trying make sure coil was good to give spark
OH OK, now we're getting somewhere.
You actually made the coil spark by manualy grounding it, so maybe the ECM is bad.
Anyway you can unhook yours and try it in his?
yes I showed the pic.
ok we back on this thing getting close we think we managed to get
spark back from coil to cap to plugs now
so were good there and we have fuel and fuel pressure
so we gona try couple more re checks today see what happens
spark back from coil to cap to plugs now
so were good there and we have fuel and fuel pressure
so we gona try couple more re checks today see what happens
TheBeast_88K5
Banned
Well!!.??
well we threw couple new parts at it and after rechecking
the coil couple time and installing it in my truck and not
working we changed it and it fired with manual test of coil to battery ground
it tested fine then we re tested it with a led light while engine was
cranking and led light did not shut off and on so test said coil
was bad im thinking it was the out going side of coil to send signal back to dizzy
just a guess though learn a lot about the truck though
TheBeast_88K5
Banned
Holy ballz.... You have MY luck.... 
so my truck stop running on side of the rode go figure it was no spark so since
i had heled my buddy figure his out went threw same steps on the side of the freeway before highway patrol pushed us of the road ended up being the icm lucky autozone was right there got there right before it closed
i had heled my buddy figure his out went threw same steps on the side of the freeway before highway patrol pushed us of the road ended up being the icm lucky autozone was right there got there right before it closed
TheBeast_88K5
Banned
Derr..... That's what I said.
But noooo....
But noooo....
