Rough idle/surging after LT headers install

F

FOXCOUPE

Founding Member

Mar 14, 2002

399

0

16

vancouver

Oct 30, 2005

#1

• Oct 30, 2005

• #1

Had a set of Flowtech Headers installed about a week ago and been doing some driving around. The car will idle at about 600-700rpm for a short while then jump to about a 1000 and then settle down back to 600 for a short while and so on. Also when the engine is cold every time i come to a complete stop the idle will drop to about 400 rpm then just when u think it's gonna stall it jumps back up. Does this have anything to do with these cars needing a tune after mods or is my car just hooped.

Current mods: CAI,75mm TB, plenum, LT's, O/R H and mufflers.

 

babeabe19

New Member

Mar 18, 2004

77

0

0

SAC TOWN

Oct 30, 2005

#2

• Oct 30, 2005

• #2

Ive got the same problem since the day i put them in. i also get P0135 and p0155 codes. it hasnt done it since i uppd the timing on my predator tuner.

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Oct 30, 2005

#3

• Oct 30, 2005

• #3

i would think you need some sort of tuning

 

nyuk98gt

15 Year Member

Oct 10, 2000

1,427

6

79

Chesterfield, MO

Oct 31, 2005

#4

• Oct 31, 2005

• #4

FOXCOUPE:

Yes, tuning is required in this case. The O2 sensors take a little longer to warm up with LTs and this can be addressed in a tune.

HTH,

Chris

 

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

3

48

StateCollege PA

Oct 31, 2005

#5

• Oct 31, 2005

• #5

mine did the same thing after i installed LT. CEL come on now and then. and funny idle. But after about month or so, i think ECU recalibrated stuff, and i have no probrem now(knock on wood)

 

F

FOXCOUPE

Founding Member

Mar 14, 2002

399

0

16

vancouver

Oct 31, 2005

#6

• Oct 31, 2005

• #6

Thanx guys. I got the same response on another board and looks like tunning is nedded. I'll wait for the cams and then i'll the car dyno tunned.

 

babeabe19

New Member

Mar 18, 2004

77

0

0

SAC TOWN

Oct 31, 2005

#7

• Oct 31, 2005

• #7

mity2 said:

mine did the same thing after i installed LT. CEL come on now and then. and funny idle. But after about month or so, i think ECU recalibrated stuff, and i have no probrem now(knock on wood)

Click to expand...

mine did that too when i first got them but a month after that, it started doin that again untill i bumped my timing. btw are the po135 and p0155 codes im getting from the front o2s or the rear?

 

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

3

48

StateCollege PA

Oct 31, 2005

#8

• Oct 31, 2005

• #8

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