Intermittent engine lag - Volvo Forums - Volvo Enthusiasts Forum


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Old 07-13-2017, 07:52 PM
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Default Intermittent engine lag

2006 128,000 miles

Ongoing issue: accelerate and engine 'falters' for an instant with a 'thump'. Added HEET to tank, but that didn't stop it. Sometimes going up a hill, or down, or on level increasing throttle can bring this about.

RPM doesn't change when this happens.

Doug
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Old 07-14-2017, 07:47 PM
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Originally Posted by osage View Post
2006 128,000 miles

Ongoing issue: accelerate and engine 'falters' for an instant with a 'thump'. Added HEET to tank, but that didn't stop it. Sometimes going up a hill, or down, or on level increasing throttle can bring this about.

RPM doesn't change when this happens.

Doug
So...could this be related to the timing chain? Doug
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Old 08-06-2017, 03:51 PM
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So...could this be related to the timing chain? Doug
Timing chain/tuneup did it!
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