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91 s10 blazer computer problem

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Old 04-28-2005, 11:58 PM   #1
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Lightbulb 91 s10 blazer computer problem

I have a 91 s10 4wd blazer that developed a occasional starting problem that has turned in to a full time issue. Check everything, finally purchased a new computer, installed properly, blazer started immediately, ran for 30 min, stopped and started several times, let it sit for an hour now same as before, no spark , no fuel spray from injectors. I disconnect the battery wait a few minutes reconnect the battery and it starts right up. Any thoughts????

Last edited by z71_off_road; 04-29-2005 at 12:26 AM.
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Old 04-29-2005, 12:44 AM   #2
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Re: 91 s10 blazer computer problem

No RPM signal can cause your symptoms. Have you checked the pick-up coil or the ignition module? An open could be developing in the pick-up coil.
Old 04-29-2005, 05:33 PM   #3
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Re: 91 s10 blazer computer problem

thats what i would look at. look close at the coil wires and see if they're breaking apart. they run better when warmed up but might cause the starting issue cold like you had. if thats the case, replace the p-up coil AND the module. sometimes they go hand in hand and nothing is more upsetting than changing one and having the other be a problem. better safe than sorry.
Old 04-29-2005, 10:04 PM   #4
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Re: 91 s10 blazer computer problem

Thanks for the ideas I give that a try tomorrow.
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