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P0171 but where is the smoke?
Have an older Blazer with the 4.3 in it. Has a rough idle and p0171 is set and LT fuel trim is at 25%. Installed the smoke machine to the brake booster hose and just get a very small trace amount from the throttle blade shaft. Spray brake clean by the shaft an... Login to read more. 
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| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1995 Chevrolet Blazer LT 4.3L
| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
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