help i am running rich!!!!!

big o car 4.6

Founding Member

Jan 3, 2002

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dallas

Mar 14, 2004

#1

• Mar 14, 2004

• #1

My car is stuttering in low RPMs and my air to fuel ratio is showing that I am running rich off the chart. I tried pulling the MAF and putting and a deferent one on a deferent one and still does it........
Thanks

 

DBMSTNG

I fantasize about it being BIG!

Founding Member

Apr 23, 2002

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not quite here

Mar 14, 2004

#2

• Mar 14, 2004

• #2

have you done anything to make it run rich? like bigger fuel injectors or something?

 

E

el_kid_1

New Member

Oct 30, 2003

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Puerto Rico

Mar 14, 2004

#3

• Mar 14, 2004

• #3

What kind of CAI Kit do you have? If you have a 90 deg bend in front of the MAF, it may cause bad readings that may cause your engine run rich or lean.

 

big o car 4.6

Founding Member

Jan 3, 2002

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dallas

Mar 14, 2004

#4

• Mar 14, 2004

• #4

I have the stock intake with stock injectors on it right now......

 

R

Roush21

New Member

Dec 31, 2003

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Mar 14, 2004

#5

• Mar 14, 2004

• #5

Sounds like you need a dyno tune to me....Get it on a dyno and let someone burn you a chip and pull some of the fuel out thats my guess..???

 

Trick98GT

New Member

Jan 9, 2003

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Pensacola, FL

Mar 14, 2004

#6

• Mar 14, 2004

• #6

Is your check engine light on?

Check all O2 sensors and make sure they're plugged into the harnesses with no damage to the wires.
Also make sure they're screwed into the pipe nice and tight. If not, the pre-cat 02s may suck fresh air and dump in more fuel.

I had the same prob until I realized that I forgot to plug in my precat sensors

 

B

BVille99GT

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May 1, 2003

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Brownsville TX.

Mar 14, 2004

#7

• Mar 14, 2004

• #7

Did you took off the screen that goes infront of the MAF when you installed the CAI

 

big o car 4.6

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Jan 3, 2002

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dallas

Mar 15, 2004

#8

• Mar 15, 2004

• #8

I have the stock intake with the MAF screen poked out. But would that really do anything?

 

2

2002BLGT

Well-Known Member

Dec 18, 2003

2,945

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59

Bedford VA

Mar 15, 2004

#9

• Mar 15, 2004

• #9

put the screen back in , see if that helps , it should .

 

big o car 4.6

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Jan 3, 2002

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dallas

Mar 15, 2004

#10

• Mar 15, 2004

• #10

I cant put the screen back in I de-screened it. There is no screen left.

 

2

2002BLGT

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Dec 18, 2003

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Bedford VA

Mar 15, 2004

#11

• Mar 15, 2004

• #11

big o car 4.6 said:

I cant put the screen back in I de-screened it. There is no screen left.

Click to expand...

get one from a junkyard

 

big o car 4.6

Founding Member

Jan 3, 2002

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dallas

Mar 15, 2004

#12

• Mar 15, 2004

• #12

but why would not haveing a screen on my stock maf cause me to run rich? I did not have one on my CAI and it never did this to me.

 

2

2002BLGT

Well-Known Member

Dec 18, 2003

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Bedford VA

Mar 15, 2004

#13

• Mar 15, 2004

• #13

it affects the air flow , the screen makes the air less turbulent .

 

Dan_Soprano

15 Year Member

May 7, 2003

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Jacksonville, FL

Mar 15, 2004

#14

• Mar 15, 2004

• #14

big o car 4.6 said:

My car is stuttering in low RPMs and my air to fuel ratio is showing that I am running rich off the chart. I tried pulling the MAF and putting and a deferent one on a deferent one and still does it........
Thanks

Click to expand...

I see in your sig. that you have an inline fuel pump..........maybe too much fuel?

 

big o car 4.6

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Jan 3, 2002

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dallas

Mar 15, 2004

#15

• Mar 15, 2004

• #15

the inline fuel pump is on a switch