running lean!

N

NX302stang

New Member

May 15, 2003

4

0

0

Portland Oregon

Feb 3, 2004

#1

• Feb 3, 2004

• #1

i have a 1989 mustang 5.0. the car is runnig lean for some wierd reason. it runs so lean that my air/fuel ratio gauge wont even read it. it only reads it when the car is warming up the morning, but when the engine temp. goes to 180 degrees, it wont read or run really lean. i have an adjustable fuel pressure regulator, which is set at 32-33 psi, w/o the vacuum line hooked up. i also have a 190 lph fuel pump. i do have the stock 19 # injectors. i was wondering if there is any way of making the car run richer w/o going to the 24# injectors? thanks a bunch guys!

 

S

sleeper89

New Member

Nov 18, 2002

388

0

0

Toronto, Ontario

Feb 3, 2004

#2

• Feb 3, 2004

• #2

first off, do you *know* the a/f guage is functioning properly?

if yes, read on:

i noticed you said you were running an afpr with pressure set at ~33lbs. vacuum off. if i'm not mistaken stock/near stock stangs usually run around 38lbs. vacuum off. i'd check that out too.


-steve

 

N

NX302stang

New Member

May 15, 2003

4

0

0

Portland Oregon

Feb 3, 2004

#3

• Feb 3, 2004

• #3

sleeper89 said:

first off, do you *know* the a/f guage is functioning properly?

if yes, read on:

i noticed you said you were running an afpr with pressure set at ~33lbs. vacuum off. if i'm not mistaken stock/near stock stangs usually run around 38lbs. vacuum off. i'd check that out too.


-steve

Click to expand...

that is waht it runs on idle. 33 psi. thanks~

 

S

stangin it

Founding Member

Sep 25, 2002

554

0

0

Long Island, NY

Feb 3, 2004

#4

• Feb 3, 2004

• #4

If the guage reads off of O2 sensor id check to make sure the O2 isnt shot. Id sounds like a problem with the guage tho.

 

N

NX302stang

New Member

May 15, 2003

4

0

0

Portland Oregon

Feb 3, 2004

#5

• Feb 3, 2004

• #5

currently the gauge works fine. for the most part. it only runs lean when the car warms up. the wire is currentl hooked up to the left bank. the instructions told me to put the signal wire on the o2 sensor. but i dunno, shouldnt it read both banks. bothe left and right? or do i need another gauge for the right bank?

 

S

sleeper89

New Member

Nov 18, 2002

388

0

0

Toronto, Ontario

Feb 3, 2004

#6

• Feb 3, 2004

• #6

NX302stang said:

that is waht it runs on idle. 33 psi. thanks~

Click to expand...

yes, i see that you said it runs 33psi at idle. i'm saying that if my memory serves me correctly that is too low, you'll want closer to 38psi at idle.



-steve