Welcome to Mustang Evolution.
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10-13-2006, 04:02 PM
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#1
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Running Too Lean...
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Registered User
Join Date: Oct 2006
City: Moreno Valley
State: California
Posts: 16
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My CEL has been on for about a month now (lol) and I just got it scanned at the Auto Shop at my high school. It said that I'm running too lean. The teacher said it could be clogged fuel injectors, misfiring cylinder because of bad spark plugs/wires, and a few other things. Does anyone have any suggestions as to what it may be, if it's common, and how to fix this? Thanks in advance. - John
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1995 Rio Red 'Stang
Mods-to-be: MAC 2.5" dual exit cat-back, CAI, UDP, 3.73 gears, Short Shifter, Tuner
Mods-after-that: Roots style blower, 8.8" rear end, Aluminum driveshaft, some other crap...
Goal: To have a sixer that beats V8's! 
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10-13-2006, 04:08 PM
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#2
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Re: Running Too Lean...
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postarama
Join Date: Aug 2003
City: Jackson
State: Mississippi
Posts: 24,136
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When was the last time the wires/plugs were changed? That's always a good place to start, and it probably wouldn't hurt to run some injector cleaner through to see if that works first.
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"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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10-13-2006, 04:23 PM
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#3
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Re: Running Too Lean...
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#2 (I Wish I Could Lope Like A tC)
Join Date: Apr 2006
City: Pineville/Alexandria
State: Louisiana
Posts: 1,265
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What is the best injector cleaner that u guys suggest that acually works?
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(Project "TORQUE")
Mods - Off Road H w/ Flowmaster 40s and 3" x 22" Tips, Shiftkit, Shorties, and 4.10s
Soon to come - UDPs, Off Road X-Pipe, A/T Cooler, and 03' Cobra Rims
Club - Tha Crew Leader of Muscle Car Division
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10-13-2006, 04:25 PM
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#4
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Re: Running Too Lean...
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I can has Mustang?
Join Date: May 2003
City: Huntsville
State: Alabama
Posts: 26,860
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10-13-2006, 08:40 PM
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#5
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Re: Running Too Lean...
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Registered User
Join Date: Oct 2006
City: Moreno Valley
State: California
Posts: 16
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OK well I just went down to the local Kragen and showed him the trouble codes that I came up with from the scan tool and the manual said that I need a new number 1 bank (whichever side that is) O2 sensor. Brand new, the both of them will run me $150! That's a lot of money that I don't have. But my friend is gonna try to pick some up for me.
About the wires/plugs, I have no clue, but I can find out. I can get a bottle of Seafoam for about $7 - $8, nothing major. That was my first thought actually. Thanks everyone!
__________________
1995 Rio Red 'Stang
Mods-to-be: MAC 2.5" dual exit cat-back, CAI, UDP, 3.73 gears, Short Shifter, Tuner
Mods-after-that: Roots style blower, 8.8" rear end, Aluminum driveshaft, some other crap...
Goal: To have a sixer that beats V8's!
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10-13-2006, 08:50 PM
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#6
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Re: Running Too Lean...
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postarama
Join Date: Aug 2003
City: Jackson
State: Mississippi
Posts: 24,136
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A bad 02 sensor would cause alot of problems, I'd recommend replacing it if it'll make it run right.
__________________
"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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10-13-2006, 08:54 PM
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#7
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Re: Running Too Lean...
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Registered User
Join Date: Oct 2006
City: Moreno Valley
State: California
Posts: 16
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Yeah definitely. I NEED A JOB!! lol I'm really hopin my friend comes through with this. The weird thing is that i haven't noticed a change. Maybe it has, I'm almost positive it has because of the problem, but it's not noticeable. I'd get better gas mileage and power though, wouldn't I?
__________________
1995 Rio Red 'Stang
Mods-to-be: MAC 2.5" dual exit cat-back, CAI, UDP, 3.73 gears, Short Shifter, Tuner
Mods-after-that: Roots style blower, 8.8" rear end, Aluminum driveshaft, some other crap...
Goal: To have a sixer that beats V8's!
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10-15-2006, 02:35 PM
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#8
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Re: Running Too Lean...
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Registered User
Join Date: Feb 2006
City: Houston
State: Texas
Posts: 35
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Check your IAT sensor of your intake. My friend's 06 v6 CEL came on running lean on both banks because his got loose and got knocked out of the cai hole.
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10-16-2006, 11:29 AM
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#9
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Re: Running Too Lean...
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Registered User
Join Date: Oct 2006
City: Moreno Valley
State: California
Posts: 16
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Well it said that it was only in the No. 1 bank, but I'll look.
__________________
1995 Rio Red 'Stang
Mods-to-be: MAC 2.5" dual exit cat-back, CAI, UDP, 3.73 gears, Short Shifter, Tuner
Mods-after-that: Roots style blower, 8.8" rear end, Aluminum driveshaft, some other crap...
Goal: To have a sixer that beats V8's!
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10-16-2006, 12:48 PM
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#10
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Re: Running Too Lean...
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You want to **** me?
Join Date: Jun 2003
City: Kansas City
State: Missouri
Posts: 12,398
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I was going to say O2 sensor... get those changed, thats most likely whats throwing the code.
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-Mike
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10-16-2006, 12:52 PM
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#11
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Re: Running Too Lean...
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,489
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it very well could be the o2 sensor. you can find them online for around 70$ a piece, i would recommend doing only one for now.
i also recommend seafoaming the car. put a tablespoon in the gas tank, then run half a bottle through the motor sipping it from a vaccum line straight into the intake. Try the seafoam first, its cheaper than getting o2 Sensors and who knows, might fix the problem temporarily until new o2's can be saved up for.
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-Thomas-
2003 Redfire Cobra "Ruby" - Mine Again!
1990 Eclipse GSX - Project "What the Hell is that clunking noise and where did my power steering go?!"
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10-16-2006, 06:29 PM
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#12
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Re: Running Too Lean...
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Registered User
Join Date: Oct 2006
City: Moreno Valley
State: California
Posts: 16
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Yeah I was also going to Seafoam it. That was actually my first thought. Thanks everyone for the feedback, it's much appreciated.
__________________
1995 Rio Red 'Stang
Mods-to-be: MAC 2.5" dual exit cat-back, CAI, UDP, 3.73 gears, Short Shifter, Tuner
Mods-after-that: Roots style blower, 8.8" rear end, Aluminum driveshaft, some other crap...
Goal: To have a sixer that beats V8's!
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