Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Sign in using an external account
Register Forgot Password?
Search


4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
Sponsored by Cruizin Concepts


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


WANT MY CAR FIXED! code P0174

Reply
 
 
 
 
Thread Tools Search this Thread
Old 09-16-2009, 06:55 PM   #1
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default WANT MY CAR FIXED! code P0174

well my cars been driving my nuts. my cel light came on recently code P0174,now its out again. went out not long after i added refridgerant to my a/c with stop leak.

ive replaced my plugs,wires,coils,injectors,fuel filter, ran fuel injector cleaner and nothing helped.
cleaned my maf and airfilter as well.

it runs rough past 2k rpms has vibration and low on power.
my cats are ruined from it running lean.

should i just take it to a mechanic? my dad doesnt seem to know whats wrong and i keep throwing money at it. he checked all the vacuum lines and said everything seems fine.

if anyone can point me in the right direction id appreciate it.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-16-2009, 07:29 PM   #2
fisher2985
2nd Gear Member
 
fisher2985's Avatar
 
Join Date: Aug 2007
Vehicle: 01 gt
Location: north carolina
Posts: 206
Default

ill pull it up when i get to work tomorrow, but i believe p0174 is system too lean bank 2. if thats the case u should look at maybe drivers side 02 sensor or bad intake gasket. maybe even try cleaning ur maf.
__________________
01 gt, 75mm prof prod throttle body and upper plenum, bbk cold air intake, march underdrive pulleys with sfi approved balancer, pypes long tubes and off road h-pipe, magnaflow mufflers, 4.10 ford racing gears, ford racing carbon fiber limited slip kit, granitelli tuner, ford racing b springs, drifz gtr 17x9
fisher2985 is offline   Reply With Quote
Old 09-16-2009, 08:14 PM   #3
LynnBob Mustang
5th Gear Member
 
LynnBob Mustang's Avatar
 
Join Date: Aug 2007
Vehicle: 1999 GT, 1965 coupe
Location: PA
Posts: 2,212
Default

I got this with a Google search...
http://reviews.ebay.com/Ford-Mustang...00000006253093
Looks like may be your MAF needs cleaning.
Lynn
__________________

'99 GT automatic
CDC Shaker scoop, K&N Filter
MAC cat back
Max Speed 1 ˝” Lowering springs
KYB GR2 shocks and struts
Cobra front brakes

'65 Mustang coupe in progress
http://mustangforums.com/forum/class...s-of-pics.html
LynnBob Mustang is offline   Reply With Quote
Old 09-16-2009, 11:00 PM   #4
stangalator
4th Gear Member
 
stangalator's Avatar
 
Join Date: Apr 2008
Vehicle: 1997 Mustang GT
Location: New York
Posts: 1,306
Send a message via AIM to stangalator
Default

normally only cats get ruined from running too rich, havn't hurt of cats getting ruined from running too lean. Anyways look into the oxygen sensor as mention above, this is what id replace if i was to replace something.

(btw love the pro 5.0, thanks again for the deal )
__________________
Race car driving is alot like sex, every guy thinks hes good at it.

http://www.newyorkmustangs.com/forum...95-t22305.html
^INSTALLED: FULL TILT BOOGIE IRS ^
306.x/298.x
13.41@104.76 (pre-cams and tune)
stangalator is offline   Reply With Quote
Old 09-17-2009, 11:05 AM   #5
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

Quote:
Originally Posted by fisher2985 View Post
ill pull it up when i get to work tomorrow, but i believe p0174 is system too lean bank 2. if thats the case u should look at maybe drivers side 02 sensor or bad intake gasket. maybe even try cleaning ur maf.

your right thats what the code means. i dont think a driver side 02 sensor would cause it to run like that and the check engine light wasnt on for the longest time then when it did come on that was the code and it just went back out.

i cleaned my maf,the intake manifold was replaced this spring. it ran great untill recently when i got this problem it instantly started running like garbage.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's

Last edited by mrxr250rider; 09-17-2009 at 11:09 AM.
mrxr250rider is offline   Reply With Quote
Old 09-17-2009, 07:08 PM   #6
fisher2985
2nd Gear Member
 
fisher2985's Avatar
 
Join Date: Aug 2007
Vehicle: 01 gt
Location: north carolina
Posts: 206
Default

my bank 2 o2 went bad and it ran terrible. i had the same p0174 system too lean bank 2 and it was dumping way too much fuel. it would cut off at idle, run bad, surge. until u went to wot and then it was ok. moved my rear 02 up to front and now it runs great. (ur rear and front 02's are the same) a bad o2 on the rear wont hurt anything, just cause the light to stay on if u cant turn em off with ur tuner.
__________________
01 gt, 75mm prof prod throttle body and upper plenum, bbk cold air intake, march underdrive pulleys with sfi approved balancer, pypes long tubes and off road h-pipe, magnaflow mufflers, 4.10 ford racing gears, ford racing carbon fiber limited slip kit, granitelli tuner, ford racing b springs, drifz gtr 17x9
fisher2985 is offline   Reply With Quote
Old 09-17-2009, 07:56 PM   #7
WhiteFoxGT
Resident Ford Troll
 
WhiteFoxGT's Avatar
 
Join Date: Jul 2006
Vehicle: 98 Cobra
Location: Delaware
Posts: 5,986
Default

Sounds like a bad vac leak dude. Pop the hood and start the car. Listen for a whistling or air rushing sound
WhiteFoxGT is offline   Reply With Quote
Old 09-17-2009, 07:59 PM   #8
fisher2985
2nd Gear Member
 
fisher2985's Avatar
 
Join Date: Aug 2007
Vehicle: 01 gt
Location: north carolina
Posts: 206
Default

Quote:
Originally Posted by WhiteFoxGT View Post
Sounds like a bad vac leak dude. Pop the hood and start the car. Listen for a whistling or air rushing sound
this too. the pcv valve hoses are bad for rotting and getting holes in em. they got like an elbow at the back of the intake check that.
__________________
01 gt, 75mm prof prod throttle body and upper plenum, bbk cold air intake, march underdrive pulleys with sfi approved balancer, pypes long tubes and off road h-pipe, magnaflow mufflers, 4.10 ford racing gears, ford racing carbon fiber limited slip kit, granitelli tuner, ford racing b springs, drifz gtr 17x9
fisher2985 is offline   Reply With Quote
Old 09-19-2009, 01:35 PM   #9
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

Quote:
Originally Posted by fisher2985 View Post
my bank 2 o2 went bad and it ran terrible. i had the same p0174 system too lean bank 2 and it was dumping way too much fuel. it would cut off at idle, run bad, surge. until u went to wot and then it was ok. moved my rear 02 up to front and now it runs great. (ur rear and front 02's are the same) a bad o2 on the rear wont hurt anything, just cause the light to stay on if u cant turn em off with ur tuner.
which 02 sensor is bank 2? whats strange is that my cel wasnt on for the longest time and wouldnt throw any codes it was on for a little while and thats the code i got and since then it went back out.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-19-2009, 01:37 PM   #10
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

Quote:
Originally Posted by fisher2985 View Post
this too. the pcv valve hoses are bad for rotting and getting holes in em. they got like an elbow at the back of the intake check that.
my car had a whistling sound after doing the pi intake swap when id get on the throttle,i think thats from the aftermarket tb?
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-19-2009, 04:21 PM   #11
fisher2985
2nd Gear Member
 
fisher2985's Avatar
 
Join Date: Aug 2007
Vehicle: 01 gt
Location: north carolina
Posts: 206
Default

bank 2 is on the drivers side and a whistle is common from a metal cold air intake.
__________________
01 gt, 75mm prof prod throttle body and upper plenum, bbk cold air intake, march underdrive pulleys with sfi approved balancer, pypes long tubes and off road h-pipe, magnaflow mufflers, 4.10 ford racing gears, ford racing carbon fiber limited slip kit, granitelli tuner, ford racing b springs, drifz gtr 17x9
fisher2985 is offline   Reply With Quote
Old 09-19-2009, 04:38 PM   #12
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

thanks.
so you think the one before the cat may be bad causing the problem?

i guess i can try changing around the 02 sensors.

i cant find any obvious vacuum leaks or hear anything out of the ordinary.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-20-2009, 04:14 PM   #13
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

bumpp
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-20-2009, 07:08 PM   #14
fisher2985
2nd Gear Member
 
fisher2985's Avatar
 
Join Date: Aug 2007
Vehicle: 01 gt
Location: north carolina
Posts: 206
Default

move the rear 02 up to the front on the left side and see if it gets better. just put mine on and it runs great now.
__________________
01 gt, 75mm prof prod throttle body and upper plenum, bbk cold air intake, march underdrive pulleys with sfi approved balancer, pypes long tubes and off road h-pipe, magnaflow mufflers, 4.10 ford racing gears, ford racing carbon fiber limited slip kit, granitelli tuner, ford racing b springs, drifz gtr 17x9
fisher2985 is offline   Reply With Quote
Old 09-20-2009, 07:36 PM   #15
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

thanks,ill try that and if thats not the problem im takin it to a shop.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-21-2009, 08:08 PM   #16
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

idk if thats the problem,the car runs the worst wot has a vibration and doesnt have the power,its noticable past 2k rpms and is felt more as the rpms increase.
also when lugging a gear high it feels like its gonna die out untill i drop it down a gear.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-24-2009, 12:06 AM   #17
Lowtryx
2nd Gear Member
 
Lowtryx's Avatar
 
Join Date: Aug 2007
Vehicle: 96 GT
Location: Canada
Posts: 175
Default

Well, my friend I'll share my experience with you.
I have a 96 GT with a CEL, code p0174 as well. I was able to diagnose it quickly because I have an OBDII IDS at my disposal. Basically, I had checked the voltage reading from the O2's (Because I was worried about the condition of my converters as well) and found them to be perfectly fine. I then tried cleaning the MAF to no avail. After a little more tinkering, I discovered it was vaccum at the Intake Gaskets. I determined this after a friend and I sprayed Tune Up Cleaner around the intake and watched as the O2's registered a voltage indication the cleaner affecting the RPM.

Long story short, (and I'll be making a thread on this momentarily) after doing the PI swap, the Intake gaskets I recieved with the kit were slightly different than that which were previously installed with the updated intake; The new gaskets differ in such a small amount that the gasket material is only out by about 3 mm's near the rear coolant jacket. This in turn leads to a coolant leak, literally as much coolant as we could pour in would be on the floor seconds later. We installed the old gaskets due to a lack of options, and thus; here we are.
__________________
Red 1996 GT
PI Swapped
BBK Shorty Headers
Pypes HFC'd X Pipe
Magnaflow Catback
Fender-Well CAI
Hurst Billet Aluminum Shifter
Rear Window Louver
Drilled/Slotted Rotors with High Perf. Pads
Hood Pins!
Sequential Tail Lights
Awful Looking Stock Rims Painted Gun-Metal
Lowtryx is offline   Reply With Quote
Old 09-24-2009, 02:50 PM   #18
mrxr250rider
3rd Gear Member
 
Join Date: Jan 2007
Vehicle: 97 mustang cobra
Location: pa
Posts: 613
Default

i just did the pi intake swap and used new pi intake gaskets.
i did the swap as deciscribed modded the gaskets to work and used silicone by the coolant jackets as shown. the first time i didnt use silicone and had a bad coolant leak and had to redo it over.
after that it was fine and has ran great untill i got this problem.
__________________
97 pacific green cobra. flowmaster exhaust,offroad h,bbk lowering springs,mgw sts and 99/01 cobra wheels.



96 gt conv 5spd SOLD!
cai,pi intake swap,profesional products plenum,mac 70mm tb,mgw shifter,bassani catted x pipe,eibach sway bars,mac catback with magnaflows,17x8/9 bullitts,nt555's
mrxr250rider is offline   Reply With Quote
Old 09-24-2009, 03:03 PM   #19
devongarver
5th Gear Member
 
devongarver's Avatar
 
Join Date: Mar 2008
Vehicle: 2000 Mustang Gt 5 speed
Location: Ohio
Posts: 2,991
Default

P0171 - System too Lean (Bank 1)
top The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit.
Air Measurement System
  • MAF sensor (contaminated, damaged, malfunctioning, etc.)
Fuel System
  • <LI class=MsoNormal>Fuel pressure regulator (leaking, malfunctioning, etc.). <LI class=MsoNormal>Fuel filter plugged, dirty. <LI class=MsoNormal>Fuel pump (weak, check valve leaking, etc.). <LI class=MsoNormal>Leaking/contaminated fuel injectors. <LI class=MsoNormal>Low fuel pressure or running out of fuel. <LI class=MsoNormal>EVAP canister purge valve leaking (when canister is "clean"). <LI class=MsoNormal>Fuel supply line restricted.
  • Fuel rail pressure sensor (incorrect reading).
Air Induction System
  • <LI class=MsoNormal>Air leaks after the MAF. <LI class=MsoNormal>Vacuum Leaks. <LI class=MsoNormal>PCV system (leak, valve stuck open, etc.)
  • Improperly seated engine oil dipstick.
Exhaust System
  • Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.)..
EGR System
  • <LI class=MsoNormal>EGR valve tube/gasket leak
  • EVR solenoid vacuum leak
Secondary Air Injection
  • Damaged/malfunctioning secondary air injection system (mechanically stuck valve).


This is the same information as a 174, just bank 1 instead of 2. It might give you a little direction...
__________________
2000 GT 5 Spd
BBK Fenderwell, Trickflow 75mm Plenum, Summit 75mm TB, Steeda Triax, King Cobra Clutch, FRPP Flywheel, Steeda Cable Adjuster/Quadrant, SLP catted X-pipe, SLP LM1 exhaust, Sniper SF Tuning, Weld in Full Length SFCs, FRPP 4.10 Gears, Carbon Clutch Discs.



**COP Sticky**

Quote:
Originally Posted by PurpleIcedGT View Post
Picture the search button as a clitoris...it opens doors that will satisfy your wildest dreams.
devongarver is offline   Reply With Quote
Old 01-14-2010, 07:57 AM   #20
moosestang
6th Gear Member
 
Join Date: Sep 2006
Vehicle: 2006 mustang gt
Location: Gainesville, FL
Posts: 11,278
Default

Well? did swapping the 02's work? My 2006 gt is giving me the p0174 code and it has the exact same symptoms as yours. Runs rough during acceleration, really it's rough all the time, but most noticeable at lower rpms. It's been supercharged for over 2 years with no problems until now.

Going to pull the plugs today, then swap 02's, swap injectors if I have to. I can monitor my 02 voltage and see it go lean when accelerating. No vacuum leaks were found.

Everyone needs to update their posts dammit!
__________________
Boost or Buell, decisions, decisions.

whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

Pumpkin jacking addict
moosestang is offline   Reply With Quote
Old 01-14-2010, 07:57 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
02, 05, 46, bank, car, code, codes, fixed, ford, gt, lean, mustang, p0174, po174, running, system

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
how much should i add? Help! mrxr250rider 5.0L General Discussion 11 09-29-2009 03:31 PM
how much should i add? help! mrxr250rider 4.6L General Discussion 14 09-28-2009 08:18 PM

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 02:33 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup