Intermittent engine lag

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Old Jul 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 Jul 14, 2017 | 07:47 PM
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Originally Posted by osage
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 Aug 6, 2017 | 03:51 PM
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Originally Posted by osage
So...could this be related to the timing chain? Doug
Timing chain/tuneup did it!
 
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