Throttle Response

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meade01

New Member

Apr 4, 2005

25

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0

Apr 12, 2005

#1

• Apr 12, 2005

• #1

On older carbuerated cars when you rev the engine up, they will come back to an idle almost immediately, but on fuel injected cars this doesn't happen, they gradually come back to an idle. I would like to know is ther something on the market now that can accomplish this on a fuel injected engine.

 

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02BlkStang

New Member

Jul 4, 2004

118

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0

Austin, TX

Apr 12, 2005

#2

• Apr 12, 2005

• #2

I believe it has something to do with the compression?

 

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Chopper1

New Member

Jan 2, 2005

91

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0

Wv

Apr 12, 2005

#3

• Apr 12, 2005

• #3

Yes there is and it costs 29 cents.You can go to your freindly neighborhood hardware store and get a 1/2 inch copper pipe cap.Drill a 3/16 hole in the end and slip it into the hose that goes from the intake tube to the IAC valve.This limits how much control the IAC has over the amount of air allowed into the engine.You can start with a 1/8 inch bit and open it up to fine tune the idle speed but 3/16 worked well in my 04 in 25*weather.The idle was about 850 RPM.It even helped the cold weather shifts in the 3650.This has been in the car for two months now with no adverse effects at all.

 

jstreet0204

Active Member

Jun 26, 2003

939

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36

Winston Salem, NC

Apr 12, 2005

#4

• Apr 12, 2005

• #4

You can change it with a tune. There is a variable in the EEC called dashpot_delay changing this variable will change the rate at which the idle falls. Some have tried modifying the IAC valve but I don't know if anyone has gotten good results without messing anything else up.

 

whyask

New Member

Apr 4, 2005

735

1

0

Sacramento

Apr 12, 2005

#5

• Apr 12, 2005

• #5

ok chopper1, im intrested in this fairly simple project, the only thing is I suck at getting directions, you have any pics of this "ITEM"..and were it goes (pic wise)

 

jrc_03_gt

New Member

Jan 1, 2004

786

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Apr 12, 2005

#6

• Apr 12, 2005

• #6

can it be fixed with a predator tuner???

 

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Chopper1

New Member

Jan 2, 2005

91

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0

Wv

Apr 12, 2005

#7

• Apr 12, 2005

• #7

whyask said:

ok chopper1, im intrested in this fairly simple project, the only thing is I suck at getting directions, you have any pics of this "ITEM"..and were it goes (pic wise)

Click to expand...

There is a 1/2 inch inside diameter hose with a rectanglular black box set in the middle.Where this hose goes into the throttle body is where you pull it loose and slip in the pipe cap.Sorry,no pics but if you go to any hardware store and ask for a 1/2 inch copper pipe cap,they will know exactly what you want.

 

jstreet0204

Active Member

Jun 26, 2003

939

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36

Winston Salem, NC

Apr 12, 2005

#8

• Apr 12, 2005

• #8

jrc_03_gt said:

can it be fixed with a predator tuner???

Click to expand...

Not sure, look for dashpot settings. One is the dashpot_delay which tells it how long to take for the rpms to fall (stock mine was 4 seconds) another is dashpot_mph_cutoff which tells it to do it only above X mph.

 

Tylerb59

Banned

Mar 7, 2003

1,895

0

0

Arlington, WA

Apr 12, 2005

#9

• Apr 12, 2005

• #9

jrc_03_gt said:

can it be fixed with a predator tuner???

Click to expand...

Not with the hand held unit.