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Old 06-08-2018, 04:39 PM   #1
Mous
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94 s-10 2.2L only runs on 3 & 4

My truck was a freebie mechanics special. I've replaced practically everything except the injectors so it seems like a safe bet. But they'd cost -/+ $100 so I want to ask for alternatives first. Another thread talked about checking the ecu on a '99 but I don't know if the diagnosis would apply to a '94. Has good spark, recently re-bored w/ new pistons, valve lifters work, runs just as good w/ 1 & 2 plug wires disconnected. lacks power.

! Do the injector wires go to relays or directly to the ecu? Maybe the wires? has anybody done this?

Update: #2 had a plugged injector, #1 had an internally grounded (brand new) autolite sparkplug. Just so you know & now y'all can sleep at night & not worry about it.

Last edited by Mous; 06-11-2018 at 03:26 AM. Reason: update
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Old 06-08-2018, 09:08 PM   #2
Tech II
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Re: 94 s-10 2.2L only runs on 3 & 4

This doesn't make sense since 1/4 and 2/3 are paired together....
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Old 06-08-2018, 09:34 PM   #3
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Re: 94 s-10 2.2L only runs on 3 & 4

Unless a cam is wiped.
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Old 06-08-2018, 10:34 PM   #4
Mous
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Re: 94 s-10 2.2L only runs on 3 & 4

Quote:
Originally Posted by Tech II View Post
This doesn't make sense since 1/4 and 2/3 are paired together....
Hi TechII: do you mean paired at the coil(they are), or paired at the ecu (are they?). There's plenty of spark so the coil isn't it. If they're paired and 1/2 works then the other half should be working too (thanks). ok I'm pulling out the injectors.

sun 11:53 edit: did that, injectors work on the bench.

Last edited by Mous; 06-11-2018 at 01:55 AM. Reason: no answer.
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Old 06-08-2018, 10:36 PM   #5
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Re: 94 s-10 2.2L only runs on 3 & 4

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Originally Posted by Blue Bowtie View Post
Unless a cam is wiped.
Cam should be ok, the rocker arms move convincingly.

Last edited by Mous; 06-11-2018 at 01:55 AM.
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