Acceleration hesitation

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Mar 18, 2020 | 01:47 PM

gordopizza

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1st Gear

Joined: Sep 2017

Posts: 23

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Acceleration hesitation

HI all,

I have a 09 JCW Clubbie that has a tune and a few other mods. Recently did the timing chain and cleared super knock codes. Upon acceleration I have an occasional hesitation around 5k rpm. Not all the time but its like if you were to lift off the gas and press the gas a few times in a row. There are no codes right now but I notice the long fuel trim is around -13.
Let me know what you guys think.

Thanks!

Last edited by gordopizza; Mar 18, 2020 at 02:08 PM.

Mar 19, 2020 | 06:24 AM

ECSTuning

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Joined: Jan 2013

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From: Wadsworth, Ohio

Al i can think of is HPFP getting weak or carbon build up. But if those are both fine i would look at the tune. Did you change out plugs and coils, they JCWs tend to need new plugs more often.

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Mar 21, 2020 | 07:37 AM

bugeye1031

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From: Burnet, Texas

Quote:

Originally Posted by ECSTuning

Al i can think of is HPFP getting weak or carbon build up. But if those are both fine i would look at the tune. Did you change out plugs and coils, they JCWs tend to need new plugs more often.

Agree with all of this^^^ I keep a set of plugs handy.