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Discussion Starter #1
Have an issue, that points to vacuum, but cannot pin it down. My truck runs at normal idle in neutral. As soon as I. go to engage a gear the rmps sky rocket. I have traced and retraced my steps any mods or repairs I did, and still cannot figure this thing out. I tested my TPS, and it is fine. Any suggestions??
 

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define skyrocket???
your spinning less mass when your foot is on the clutch.
but you saying skyrocket gives no actual information.
 

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Discussion Starter #4
The TPS was throwing of the computer causing the rpms to race. So when I would put the tranny in gear the ecm would advance the timing and increase rpms
 
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