Idle Hangs @ 1500, then down, how to fix?

1

150pounder

New Member

Nov 24, 2001

8

0

0

ontario can.

Aug 4, 2005

#1

• Aug 4, 2005

• #1

Hey guys, I got a chip burned today, took care of all my drivability issues except for when slowing down, as soon as you put the clutch in, the idle jumps to 1500, then few secs later drops to normal, it does this when just reving the engine too.

The guy who burned the chip tried tuning it out, but where should I be looking to fix this, its really annoying and doesn't seem right at all.

thankyou

 

super302

I'd do anything for free Bapples

May 29, 2004

2,878

1

0

Davenport, IA

Aug 4, 2005

#2

• Aug 4, 2005

• #2

completely normal, all manual cars should do this so your car doesnt stall when you turn or have a bunch of accesories on, etc

 

SeventyMach1

Keep it lubed .... keep it straight .... and keep

Mar 30, 2005

1,940

3

36

North Carolina

Aug 4, 2005

#3

• Aug 4, 2005

• #3

Then I don't think my car is normal. Mine doesn't jump to 1500. Should it?

Did it do this before the burn? Oh.... and welcome to Stangnet.

 

super302

I'd do anything for free Bapples

May 29, 2004

2,878

1

0

Davenport, IA

Aug 4, 2005

#4

• Aug 4, 2005

• #4

it should be around 1200 or so rpms, but if the poster has substantial mods then it would be fine for it to splurge a little higher

 

YEAHLOH95

Founding Member

Nov 19, 2001

1,249

3

39

EVERETT,PA

Aug 5, 2005

#5

• Aug 5, 2005

• #5

fox throttle body cures it .

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Aug 5, 2005

#6

• Aug 5, 2005

• #6

Like Patrick, et al said, it is a function of the VSS and puter to prevent rolling idle stalling. I would have thought a chip tuner could modify the function.

BTW, the amount it hangs or increases can depend upon the base idle setting and what RPM the car is idling at, at the time (i.e. cold motor vs warm motor).

Some folks do see 1500 RPM during this time, but they generally have their base idle set to ~1000 rpm. If the base idle is set at say 750, the rolling idle should be ~1200 RPM.

 

91LX_5L

Founding Member

May 13, 2002

1,943

0

36

British Columbia

Aug 5, 2005

#7

• Aug 5, 2005

• #7

#1 Clean your IAC
#2 Set your TPS

That will help a lot.

 

a50sn95

Founding Member

Oct 12, 2001

368

0

16

Elk Grove, CA

Aug 5, 2005

#8

• Aug 5, 2005

• #8

Mine doesn't do it, after I fixed the Throttle body Ariflow and the Dashpot preposition settings with my Tweecer. Drops to 1000 rpm for a few seconds, and then to idle. Also idles down the street at 900rpms with no clutching or touching the throttle. It didn't do this before....
Here's a link to my thread on: EECtuning.org