ahhh headswap done...but one more question

97yelstang

Member

Sep 12, 2004

43

0

6

Schuykill Haven, PA

Nov 26, 2006

#1

• Nov 26, 2006

• #1

ok i finally finished the pi headswap and what a pain in the ass that was but its done and i'm happy with it
but i have one question...is there an idle re-learn procedure??
cause at idle i have a random misfire but when i give it throttle it goes away and drives nicely.
anyone else have this problem?
btw there is a tremedous exhaust leak but i'll take care of that next weekend

 

DropTopPony

Noob Slayer

Founding Member

Aug 13, 2002

2,570

3

48

south jersey

Nov 26, 2006

#2

• Nov 26, 2006

• #2

its gonna take alittle while for the comp to readjust for all that new airflow...make sure you have premium fuel now.

 

whyask

New Member

Apr 4, 2005

735

1

0

Sacramento

Nov 26, 2006

#3

• Nov 26, 2006

• #3

start it let it idle for at least a minute,
turn your ac on let it idle for a minute
drive 10-20 miles NORMAL driving for the PCM to relearn all the new air/fuel curves and use 91 octane...

This worked for me on my last head swap..good luck

 

M

MatthewP

Founding Member

Dec 7, 2001

355

0

0

Calgary, Alberta

Nov 26, 2006

#4

• Nov 26, 2006

• #4

It shouldn't misfire at idle, and you shouldn't have to go through a lengthy procedure to relearn anything. As someone suggested, make sure you have premium fuel because you just upped the compression significantly. After that, double check your plugs and connections, and look for any vacuum leaks.

Good luck.

-Matthew

 

97yelstang

Member

Sep 12, 2004

43

0

6

Schuykill Haven, PA

Nov 27, 2006

#5

• Nov 27, 2006

• #5

it seemed to go away now..hopefully, but sometimes it seems like it wants to stall but the idle catches itself at about 200rpms and doesn't let it stall (only did that about 2-3times) other than that the car RIPPS... i luv the headswap probably one the best mods i did so far
but my coolant temp never gets in the normal range anymore, i have a 160 t-stat in it that came with the chip
but the car blows good heat
could there be air in the coolant system causing the one sensor to read wrong?

 

R

Robuilt

Founding Member

Sep 7, 2001

306

0

16

McAllen, TX

Nov 28, 2006

#6

• Nov 28, 2006

• #6

are you sure its not the idle control valve thing under the throttle body?

 

stangGT97

New Member

Dec 22, 2004

1,299

1

0

Boston area, MA

Nov 28, 2006

#7

• Nov 28, 2006

• #7

97yelstang said:

it seemed to go away now..hopefully, but sometimes it seems like it wants to stall but the idle catches itself at about 200rpms and doesn't let it stall (only did that about 2-3times) other than that the car RIPPS... i luv the headswap probably one the best mods i did so far
but my coolant temp never gets in the normal range anymore, i have a 160 t-stat in it that came with the chip
but the car blows good heat
could there be air in the coolant system causing the one sensor to read wrong?

Click to expand...

air in the coolant is a possibility, after my intake swap i had to add coolant a couple times until the air was gone.

 

RandyStinchcomb

New Member

May 25, 2005

1,159

3

0

Randallstown, Md

Nov 28, 2006

#8

• Nov 28, 2006

• #8

1st off you need to get-rid of that 160* thermostat and get a 180* or higher then I'd check the plugwires, if there old they may need tobe replaced and what did you do for sparkplugs? also that exhaust leak will give you problems as the O2'(S) wont get a proper reading and can cause all kinds of issues.