Timing Problem

1994 CHEVROLET S-10
130,000 MILES • 6 CYL • 2WD • AUTOMATIC
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TUDE
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94 Chev S-10 v6 has a timing problem. Replaced timing gears and chain. Runs well, but will start acting like timing is off intermittently. After awhile, it will return to normal running. Where do I look next to determine the problem?
Dec 8, 2010 at 1:33 PM
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WRENCHTECH
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What does "acting like timing is off intermittently" sound like?
Dec 8, 2010 at 1:44 PM
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TUDE
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It starts to run rough, loses power. It runs like the timing is off. After awhile, it will run correctly again. My guess is that it somewhere in the electronics, but do not want to start replacing expensive parts without some expectation that they will correct the problem. After timing chain and rears were replaced, computer was also replaced. The computer made small difference, but problem still occurs.
Dec 8, 2010 at 2:09 PM
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WRENCHTECH
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Is this a "W" motor or a "Z" motor (8th digit of VIN)
Dec 8, 2010 at 2:14 PM
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TUDE
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It is "Z"
Dec 8, 2010 at 2:21 PM
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WRENCHTECH
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The ignition time can be adjusted on that engine by disconnecting the timing connector but i really doubt this is a timing issue. You really need a scan tool to monitor all the sensor data to see what story it tells when this issue occurs. It's a TBI engine so it's pretty basic. Make sure the EGR isn't leaking through the base of the throttle body.
Dec 8, 2010 at 2:56 PM
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TUDE
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Thank you. We will try that.
Dec 8, 2010 at 4:22 PM
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