1994 Chevy S-10 Quits running

OLDSROCKET

MEMBER
1994 CHEVROLET S-10
4 CYL
2WD
MANUAL
106,000 MILES

My 94 S10 with a 4 cyl 2.2 runs fine then will just die. When it dies and wont start, I can hear the fuelpump running. I plugged in a noid light to one of the injector plugs and it is not firing. Sometimes it will start agian in 10 seconds, sometimes 40 minutes later. It always starts when it is cold, it seems to happen after it is up to temp.

Thursday, October 14th, 2010 AT 5:59 PM

7 Replies

JDL

MECHANIC
16,098 POSTS

When the problem occurs, did you happen to visually check for spark at the plugs, engine cranking? The pink wire at the injector/s should be hot, key on, no crank, is it hot. If the computer doesn't see an rpm signal, it won't pulse the injector ground. The rpm signal comes from the crank sensor, through the ignition module, but, there could be other issues.

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Thursday, October 14th, 2010 AT 6:13 PM

OLDSROCKET

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4 POSTS

Thanks for the reply; With the key on after the engine dies, the pink injector wire is hot. Visually have no spark at the spark plug while cranking.

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Thursday, October 14th, 2010 AT 7:39 PM

JDL

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16,098 POSTS

Right now, I think the problem is the crank sensor.

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Thursday, October 14th, 2010 AT 9:38 PM

OLDSROCKET

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4 POSTS

Thanks; Is the crank sensor right below the coils? Where is the ignition module located?

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Friday, October 15th, 2010 AT 11:45 AM

JDL

MECHANIC
16,098 POSTS

My info doesn't give the exact location of crank sensor. The spark plug wires go to the coil pack, the coil pack sits on top of the ignition module. The crank sensor wiring, plugs into the ignition module. Note the wiring colors in the diagram, track the wires.