Need ignition help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Farmstore34 · 11-23-2007, 01:37 AM

Hi all,
I am working on a 1989 Chevy Blazer that belongs to my sister. The previous owner ran the motor out of oil and grenaded it. We built a new 350 engine for it and just finished swapping it in. We got everything hooked back up and the new engine fired right up. We ran it at high idle to break in the cam for about 20 min and shut it off and restarted it a few times, no problem. Went out for a test drive and it suddenly quit. I checked around and found that we have no spark coming out of the coil. I double checked all connections, made sure theres juice going into the coil but can't find anything wrong. I suspect either the coil or the ignition module inside the distributor. Any other ideas? This is so frustrating!

Thanks,
Colby.

BLE 'BURBAN · 11-23-2007, 01:52 AM

Pull the module and take it in to one of your better local auto parts stores and see if they can test it for you. As for the coil, you can check the ohms resistance between the contacts at various points of contact, make note of the readings and then compare them to a new one. Any great variation I'd say replace the coil. but most likely culprit is the module in the distributor.

Farmstore34 · 11-23-2007, 10:07 PM

Bingo! The ignition module was bad. Blazer is now running great! Thanks BLE.
Colby.

11-23-2007, 01:37 AM	#1
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Need ignition help Hi all, I am working on a 1989 Chevy Blazer that belongs to my sister. The previous owner ran the motor out of oil and grenaded it. We built a new 350 engine for it and just finished swapping it in. We got everything hooked back up and the new engine fired right up. We ran it at high idle to break in the cam for about 20 min and shut it off and restarted it a few times, no problem. Went out for a test drive and it suddenly quit. I checked around and found that we have no spark coming out of the coil. I double checked all connections, made sure theres juice going into the coil but can't find anything wrong. I suspect either the coil or the ignition module inside the distributor. Any other ideas? This is so frustrating! Thanks, Colby.

11-23-2007, 01:52 AM	#2
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: Need ignition help Pull the module and take it in to one of your better local auto parts stores and see if they can test it for you. As for the coil, you can check the ohms resistance between the contacts at various points of contact, make note of the readings and then compare them to a new one. Any great variation I'd say replace the coil. but most likely culprit is the module in the distributor. __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade

11-23-2007, 10:07 PM	#3
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Re: Need ignition help Bingo! The ignition module was bad. Blazer is now running great! Thanks BLE. Colby.



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