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Part throttle surging/hesitation on highway..ANY IDEAS?

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Old 05-22-2006, 08:15 AM
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I will take it off this evening. What do you make of these throttle angle spikes?
Old 05-22-2006, 08:23 AM
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Default The throttle angle spikes...

Are probably due to the engines adjusting for your erratic load via the throttle manipulation.

Notice how your MAF reading starts to move before your throttle, when the throttle overreacts and makes those relatively large adjustments.
Old 05-22-2006, 08:28 AM
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one more thing that I find strange...my rpm's remain constant during these jerks?
Old 05-22-2006, 08:42 AM
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That makes sense if the car is reacting to a perceived load change rather than an actual one.
Old 05-22-2006, 09:56 AM
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Default I had somewhat similar symptoms

Jerky power under load 3.5k-6.5krpm. Even thought I was hearing light whooshing too.

So did put in a samco tbb (from vr_life's collection).

However, while my mech was in there up to his elbows, he replaced all the fraying brittle vacuum lines, and put in decent clamps.

Pressure test afterward.

Smooth as a baby's butt now...

Chris
Old 05-22-2006, 06:22 PM
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That's what I feel with the GIAC, did not have it with the MTM, APR or AMS
Old 05-23-2006, 06:15 AM
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YGM
Old 05-23-2006, 06:17 AM
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Default so it isn't chip related then...something is not working properly then..

maybe we can figure it out together?
Old 06-07-2006, 04:09 PM
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Took of TBB today..no cracks..any other ideas?
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