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Base timing shifting when hot
Got a Blazer that will not pass smog because of timing. When it is cold Set the base timing to 0 Deg. when the engine warms up the base timing moves to 25 Deg. That is with the timing connector disconnected. Tried setting the timing to 0 Deg when warm and it f... Login to read more. 
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132 Replies Received
132 Replies Received
| Engine | 5.7 L |
| Trans | 3-speed Automatic (Electronic) |
Vehicle Data
1990 Chevrolet Blazer Silverado 5.7L
| Engine | 5.7 L |
| Trans | 3-speed Automatic (Electronic) |
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