Making the throttle react quicker...

Reign_Maker

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Aug 31, 2005
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Ok, when I pull the throttle cable/arm there is an instant pause before the rpms go up... Why? What can I do to make this more fluid?

Is this too vague? lol :aigo: :1zhelp: :aigo:
 

Reign_Maker

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No, its not that IJ... ITs more like, hmmm, how can I describe this? Im sure we've all had this thing happen... You pull the throttle open quickly, and its almost like it sucks in air for an rpm pause and then revs... Instead of a steady rev in the rpm's, it has a slight studder or pause before it reacts... Could it be my TPS or one of the many other sensors? Or should I make an adjustment on the vpc?

I hope Im describing this "problem" correctly...
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
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So it boggs when you quickly open the butterfly. Maybe it's just because you're basically dumping air into it and the comp needs that milisecond to adjust to it?
eric
 

Reign_Maker

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CPT Furious said:
Perhaps adjust the "response" knob on the VPC...::SHRUGS::


Im gunna try that... I think that might be the problem too... I was thinking that or the TPS... But I'll try adjusting the vpc...

It didnt do this before I dyno tuned it, and with all the knob turning and button pushing, I may have turned the response not menaing to, or something... Or maybe I need to adjust it now that I tuned out everything else...

I need a wideband, I wanna street tune this thing...

Thanks guys...
 

robbo185

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Apr 6, 2005
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Reign_Maker said:
Im gunna try that... I think that might be the problem too... I was thinking that or the TPS... But I'll try adjusting the vpc...

It didnt do this before I dyno tuned it, and with all the knob turning and button pushing, I may have turned the response not menaing to, or something... Or maybe I need to adjust it now that I tuned out everything else...

I need a wideband, I wanna street tune this thing...

Thanks guys...
i know this post is old...but im having the same problem now......what did you do to solve your problem?
 

p5150

ASE and FAA A&P Certified
Mar 31, 2005
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I was going to say that you should lean out the fuel on the lower end - but it looks like you already figured it out.
 

Nick M

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Sep 9, 2005
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Reign_Maker said:
No, its not that IJ... ITs more like, hmmm, how can I describe this? Im sure we've all had this thing happen... You pull the throttle open quickly, and its almost like it sucks in air for an rpm pause and then revs... Instead of a steady rev in the rpm's, it has a slight studder or pause before it reacts... Could it be my TPS or one of the many other sensors? Or should I make an adjustment on the vpc?

I hope Im describing this "problem" correctly...
Sounds like a dead spot on the potentiometer. I don't know anything about adjusting a VPC.

edit:

You test it with a scope. You need to depress the pedal all the way to the floor and look for a clean upward sweep, with out a low spot. Or flat spot.
 

billspreston01

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Jun 2, 2005
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my engine does that too....I'll open the butteryfly valve all the way and the k&n will make a whoosh and then it revs...I just figured it took a quick second for all that air and fuel to make the revs jump...it's like 4.3 miles from the turbo to the throttle body when using a factory intercooler and piping.

p.s. my car idles at 650, has good compression all around, and everything is set right.
 

IHI-RHC7

"The Boss"
Apr 1, 2005
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On stock cars, that's the plenum filling before the charge reaches the valves.
That's why I'm fond of an open surgetank and individual tbs.
 

Reign_Maker

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Where were all you guys when I was having this problem??? I wouldnt have taken my motor out, flipped it upside down and shaken the crap out of it, if you guys would've helped me... :D:D:D:D
 

supra90turbo

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Mar 30, 2005
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So, did you fix it yet Reign_Jake? jeez....

IHI_Jake: ITB's on a 7M. mmmmmmmmmmmmmmm
I'm still gonna do it someday....
 

Reign_Maker

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supra90turbo said:
So, did you fix it yet Reign_Jake? jeez....
:aigo: :aigo: :aigo: :aigo: :aigo: :aigo:
Reign_Maker said:
it was my response setting on my VPC... I played with it and fixed it...
:biglaugh: :biglaugh: :biglaugh: :biglaugh: :biglaugh: :biglaugh: