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low engine vacuum at idle
I have poor braking because of low engine vacuum. I only have 14" at idle on start up, the vacuum pump does not run until it see, low engine vacuum like 4or 5". Car has only 28000 miles and no DTC's, and current PCM update Login to read more. 
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34 Replies Received
34 Replies Received
| Engine | 3.6 L |
| Trans | 5-speed Automatic (Electronic) |
Vehicle Data
2012 Jeep Wrangler Sport 3.6L
| Engine | 3.6 L |
| Trans | 5-speed Automatic (Electronic) |
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