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Vacuum Leak From Brake Booster
Group, One of my coworkers was telling me about an experience with a brake booster causing lean codes and misfires... A new vacuum brake booster solved the P0171 and P0174 lean codes and some misfires. I did not see the truck. My question is... would a smoke m... Login to read more. 
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| Engine | 4.6 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2004 Ford F-150 XLT 4.6L
| Engine | 4.6 L |
| Trans | 4-speed Automatic (Electronic) |
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