Timing Problem

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1994 CHEVROLET S-10
6 CYL
2WD
AUTOMATIC
130,000 MILES

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?

Wednesday, December 8th, 2010 AT 9:33 PM

6 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

What does "acting like timing is off intermittently" sound like?

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Wednesday, December 8th, 2010 AT 9:44 PM

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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.

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Wednesday, December 8th, 2010 AT 10:09 PM

WRENCHTECH

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Is this a "W" motor or a "Z" motor (8th digit of VIN)

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Wednesday, December 8th, 2010 AT 10:14 PM

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It is "Z"

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Wednesday, December 8th, 2010 AT 10:21 PM

WRENCHTECH

MECHANIC
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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.