No spark 89 TBI 454..FIXED!!

[MTBLAZER89]

Driving home from work today and my Crew cab died.

I coast to the side of the road and try to restart. Cranks good, but won't catch. Kinda backfires light a couple times then nothing. I switch tanks and try..nothing.

I checked my ign and both ECM fuses. Everything is good. I had a paperclip handy so I checked for any codes. Just a 12.

I call a buddy and he comes and tows me home.

I get home pop the air cleaner off and can smell a little fuel. I have him crank it and can see the injectors pulsing good cones of fuel. Thats a plus!

Pull the number one plug and crank again. No spark there. I pull the coil wire and try that. No spark there.

Break out the book and search around here a little. Read out my ign coil. Got .6 ohms on the sec and 14k on primary. Ok that checks good, but it is cool now so I run down to the store and grab a coil.

Swap that in and nothing still. I pull the cap and the rotor. Both are fairly new and look good.

Pick up coil reads 750 ohms so that should be good.

I am stuck on what to check or try next.

 

[4X4HIGH]

Sounds like an ignition module since you've checked everything else and they passed the testing.

 

[MTBLAZER89]

Ok I wasn't sure if that was part of it or not. I thought it controled injector pulse, and that checks good.

 

[4X4HIGH]

Ok I wasn't sure if that was part of it or not. I thought it controled injector pulse, and that checks good.

The module does send a signal to the ECM for injector pulse but i have seen the modules be bad and have no spark but still have injector pulse. They don't cost much and since they are known to go bad frequently on GM vehicles i like to keep a spare in my glove box anyways. I would recommend you replace the module and IF it is not your problem then throw the old one in the glove box as an emergency back up.

 

[USSkoval]

+1 for ignition module

 

[MTBLAZER89]

Going to have my module checked at the Part store..

 

[MTBLAZER89]

Ignition module took care of the problem

 

[4X4HIGH]

Ignition module took care of the problem

Glad to help. Now go buy another to throw in the glovebox so you don't get stranded somewhere sometime in the future.

 

[scrappyk5]

good call , should do that myself.

 

[dhcomp]

Glad to help. Now go buy another to throw in the glovebox so you don't get stranded somewhere sometime in the future.

I'm going to need a secret underfloor storage for all these spare parts i want to keep on hand now. Damn you scott.....

As if i'm not already carrying enough tools and parts to practially rebuild my truck on a daily basis already......not sure how you guys do it in a blazer, my burb is filling up!