1996 Blazer will not start, no spark

Thermal · 12-31-2004, 03:50 PM

I have a 1996 S-10 Blazer 4x4 with about 180k miles on it. Everything was running fine until I had to replace the alternator due to a bad bearing. I bought a remanufactured one from AutoZone and installed it along with a new belt tensioner. Now my Blazer won’t start. It does turn over and I can hear the fuel pump turn on but it will not run. I checked for spark using a timing light and found that sometimes 2 or 3 plugs don’t spark. I checked for spark on the coil wire and it seems to be working fine. Could I have fried the ignition module/computer when I installed the new alternator? Could it be a bad alternator?

Thanks for the help.

Thermal · 01-02-2005, 09:01 PM

I checked the crank sensor and sensor wire and everything looks ok but I do not know how to test it. I just replaced the distributor cap and rotor but my Blazer still doesn't run. When I check for spark between the coil and the distributor and it seems to spark just fine. But when I check for spark between the distributor and the spark plug, sometimes there is no spark. How do I test the crank sensor? Does anyone have any suggestions?

Thanks for your help.

LOBLZR · 01-09-2005, 05:56 PM

alternator will not prevent the engine from running. All it does is charge the battery. Is it sparking when its supposed to (timing) ? Ive had a v6 run rough minus 2-3 cylinders, so a couple not firing wont keep it from running at all. And it ran fine right before you changed the alternator??

91s-10 · 01-09-2005, 06:24 PM

did you plug everything back in?

Thermal · 01-09-2005, 07:21 PM

I don’t know how or why but it runs now. I let it sit in my garage for a couple of days and it started right up. I didn’t do anything to it. Maybe moisture got into the distributor or something. Or maybe it just healed itself.

12-31-2004, 03:50 PM	#1
Thermal Registered User Age: 31 Join Date: Jul 2004 Posts: 23 Location: User is: OffLine	1996 Blazer will not start, no spark I have a 1996 S-10 Blazer 4x4 with about 180k miles on it. Everything was running fine until I had to replace the alternator due to a bad bearing. I bought a remanufactured one from AutoZone and installed it along with a new belt tensioner. Now my Blazer won’t start. It does turn over and I can hear the fuel pump turn on but it will not run. I checked for spark using a timing light and found that sometimes 2 or 3 plugs don’t spark. I checked for spark on the coil wire and it seems to be working fine. Could I have fried the ignition module/computer when I installed the new alternator? Could it be a bad alternator? Thanks for the help.
	[Reply w/Quote]

01-02-2005, 09:01 PM	#2
Thermal Registered User Age: 31 Join Date: Jul 2004 Posts: 23 Location: User is: OffLine	Re: 1996 Blazer will not start, no spark I checked the crank sensor and sensor wire and everything looks ok but I do not know how to test it. I just replaced the distributor cap and rotor but my Blazer still doesn't run. When I check for spark between the coil and the distributor and it seems to spark just fine. But when I check for spark between the distributor and the spark plug, sometimes there is no spark. How do I test the crank sensor? Does anyone have any suggestions? Thanks for your help.
	[Reply w/Quote]

01-09-2005, 05:56 PM	#3
LOBLZR CHANGE YOUR EMAIL ADDRESS Join Date: Jun 2003 Posts: 19 Location: Outside houston User is: OffLine	Re: 1996 Blazer will not start, no spark alternator will not prevent the engine from running. All it does is charge the battery. Is it sparking when its supposed to (timing) ? Ive had a v6 run rough minus 2-3 cylinders, so a couple not firing wont keep it from running at all. And it ran fine right before you changed the alternator??
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01-09-2005, 06:24 PM	#4
91s-10 Registered User Age: 27 Join Date: Apr 2002 Posts: 661 Location: Crittenden, Kentucky User is: OffLine	Re: 1996 Blazer will not start, no spark did you plug everything back in?
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01-09-2005, 07:21 PM	#5
Thermal Registered User Age: 31 Join Date: Jul 2004 Posts: 23 Location: User is: OffLine	Re: 1996 Blazer will not start, no spark I don’t know how or why but it runs now. I let it sit in my garage for a couple of days and it started right up. I didn’t do anything to it. Maybe moisture got into the distributor or something. Or maybe it just healed itself.
	[Reply w/Quote]