i need help, have codes

BK_CAULEY · May 2, 2007

hey guys, im sure some of you remember me from the other day when i asked about my car skipping and bucking. i replaced the o2 sensors just out of a guess and it stopped well today anytime i mash the gas, say up to 2500 it will hang at 2500 if i mash it to 3200 it will stick there. the throttle is not sticking or hanging. so i went and had the codes pulled and here is what i got. my mods are in my sig and i think i need to heed the advice giving by quite a few on here and put my factory mass air meter and injectors (which i no longer have, thats a different question) back on.

but here is the codes.

PO153

1. oxygen sensor defective
2. fuel sytem running rich or lean-check other codes first.
3. engine misfire condition-repair
4. fuel pressure very high or low-fuel pump
or pressure regulator.

po430

1.catalytic converter defective (failure possibly due to #2, 3 or 4) HAVE NO CATS
2. engine misfire or running condition
3. large vacum leak
4. engine oil leakage into exhaust valve guide seals, piston rings.

po172

1. if bank one and two codes set together suspect fuel pressure or MAF sensor.
2. oxygen sensor defective.
3. ignition misfire -repair
4.fuel injector problem

po175

1.if bank one and two codes set together suspect fuel pressure or MAF sensor.
2.failed HO2S21
3.ignition misfire condition
4.fuel injector problem
5.engine mechanical condition

po136

1.oxygen sensor defective
2.fuel sytem running rich
3.ebgine misfire condition-repair
4.fuel pressure very high or low fuel pump or pressure regulator.

well thats it guys. try not to rag me to hard and if anyone can give me some advice on fixing my problem please do. i just dont understand why i keep frying o2 sensor's. could it be because of the bigger injectors and mass air meter? thanks in advance for any input.

chuck943 · May 2, 2007

P0430 is catalytic convertor efficiency code,PCM is looking at how many times front O2 switches as compared with how many times the rear O2 switches,if they are switching close to equal then PCM knows cats are not working. If you don't have cats then this code will set.
P0172/P0175 are rich codes,PCM has reached calibration limits trying to lean fuel out. Look for restricted exhaust,to high fuel pressure,or it could just be from the larger MAF and injectors if PCM has not been calibrated for these, or maybe cam timing(has anyone changed camshafts?).
P0136 is a voltage out of limits code to bank1 rear O2
P0153 is slow circuit response to bank2 front O2
both are electrical issues with O2 circuits,however MAF could set P0153 but usually on V8 P0133 will also set if MAF causes it. Do you have any connectors unhooked to O2's? Do you still have your old MAF,if so then reinstall it and see if you can eliminate some of the codes.

BK_CAULEY · May 3, 2007

THANKS. i appreciate the explinations. so why is my idle hanging up when i give it the gas. as mentioned before where ever i give it the gas to be it 2500, 3000, 3350 or any rpm it will hang up where i let off. and i checked my throttle cables and linkage and its not sticking anywhere. and which side of the engine is bank one? and do you suggest getting new o2's as well??

RandyStinchcomb · May 3, 2007

BK_CAULEY said:
THANKS. i appreciate the explinations. so why is my idle hanging up when i give it the gas. as mentioned before where ever i give it the gas to be it 2500, 3000, 3350 or any rpm it will hang up where i let off. and i checked my throttle cables and linkage and its not sticking anywhere. and which side of the engine is bank one? and do you suggest getting new o2's as well??

bank 1 is whichever side the fuel feed to the rail is on, so in your case, bank 1 is on the right/passanger side.

now, as I've stated before: ONLY buy OEM Ford electronics for your car, parts store stuff just is not designed to work on Fords

and DO NOT MIX O2 sensore wth O2 monitors, I don't care what others say. they are NOT interchangeable and work differently

also you hanging idle could be a bad IAC which you'll need to replace wth a OEM one and also change your PCV valve, also wth an OEM one

BK_CAULEY · May 3, 2007

RandyStinchcomb said:
bank 1 is whichever side the fuel feed to the rail is on, so in your case, bank 1 is on the right/passanger side.

now, as I've stated before: ONLY buy OEM Ford electronics for your car, parts store stuff just is not designed to work on Fords

and DO NOT MIX O2 sensore wth O2 monitors, I don't care what others say. they are NOT interchangeable and work differently

also you hanging idle could be a bad IAC which you'll need to replace wth a OEM one and also change your PCV valve, also wth an OEM one

wtf is an o2 monitor? ive never even heard of that. and is there any way i can try and clean my idle air control valve like i have done on my fox. that helped me before.

RandyStinchcomb · May 3, 2007

BK_CAULEY said:
wtf is an o2 monitor? ive never even heard of that. and is there any way i can try and clean my idle air control valve like i have done on my fox. that helped me before.

O2 monitors are the ones aft of the cats, O2 sensors are the ones in front of the cats.

cleaning an IAC is just a bad-aid approach, you should just buy a new OEM/Ford IAC and PCV valve and be done wth-it.

now, just an FYI, PCV valves should be changed every 30k and failure to-do-so will result in poor performance, a clogged IAC and lots of oily residue in the intake tract

BK_CAULEY · May 3, 2007

so my rear o2 sensor is a 02 monitor???

RandyStinchcomb · May 3, 2007

BK_CAULEY said:
so my rear o2 sensor is a 02 monitor???

correct and they should never be swapped for each other as they work differently from each other and swapping them could cause ECM problems.

BK_CAULEY · May 3, 2007

RandyStinchcomb said:
correct and they should never be swapped for each other as they work differently from each other and swapping them could cause ECM problems.

GOTCHA!! so what about my mass air meter and injectors being too much? have an opinion on that? and yes i am fixing to get a tune. (if i keep the injectors on)

RandyStinchcomb · May 3, 2007

BK_CAULEY said:
GOTCHA!! so what about my mass air meter and injectors being too much? have an opinion on that? and yes i am fixing to get a tune. (if i keep the injectors on)

24's are to much on a stock engine wthout having a proper tune and "who's" MAF are you using?

chuck943 · May 3, 2007

No the O2's them self are NOT monitors although I believe Ford Parts catalog does call the rear ones monitors. Monitors are on board strategies designed to monitor certain systems for deterioration or malfunctions. There are several of them, fuel system monitor, catalyst monitor, heated oxygen sensor monitor, evap monitor,missfire monitor etc.
The front O2 sensors are used for the fuel system monitor. Under specific conditions the fuel control checks the front O2's for proper voltage output and response rate,the time it takes to switch from rich to lean or lean to rich.
The downstream O2's are used for the catalyst monitor and they are also checked for proper voltage output. The heated oxygen sensor monitor then evaluates the fuel control monitor and the catalyst monitor for proper function. It will check the voltage amplitude and compare it with a programed value if it is ok it will then execute a closed loop fuel control routine and the upstream O2's will then be evaluated to determine if the sensor is capable of switching or has a slow response rate. It also turns on/off the heater circuit of the sensor and measures the current going thru the circuit. The MIL will turn on after a fault is detected on 2 consecutive drive cycles(cold engine to warm then back to cold).

Bank 1 is always the right side(passenger) on ford gasoline engines.
Front O2's have a different connector than the rear ones so you can not plug a rear into the front without getting creative,but you can hook right and left up backwards.

As far as larger injectors and MAF sensors go you can have the MAF calibrated for the size injector you are running however this is fooling the PCM and although on a stock engine it would probably not hurt anything it is not as good as having your PCM programmed to really know what size injectors and MAF you really have.

The High idle could be an IAC sticking but it may also be the PCM commanding it because it sees a problem.

BK_CAULEY · May 4, 2007

chuck943 said:
No the O2's them self are NOT monitors although I believe Ford Parts catalog does call the rear ones monitors. Monitors are on board strategies designed to monitor certain systems for deterioration or malfunctions. There are several of them, fuel system monitor, catalyst monitor, heated oxygen sensor monitor, evap monitor,missfire monitor etc.
The front O2 sensors are used for the fuel system monitor. Under specific conditions the fuel control checks the front O2's for proper voltage output and response rate,the time it takes to switch from rich to lean or lean to rich.
The downstream O2's are used for the catalyst monitor and they are also checked for proper voltage output. The heated oxygen sensor monitor then evaluates the fuel control monitor and the catalyst monitor for proper function. It will check the voltage amplitude and compare it with a programed value if it is ok it will then execute a closed loop fuel control routine and the upstream O2's will then be evaluated to determine if the sensor is capable of switching or has a slow response rate. It also turns on/off the heater circuit of the sensor and measures the current going thru the circuit. The MIL will turn on after a fault is detected on 2 consecutive drive cycles(cold engine to warm then back to cold).

Bank 1 is always the right side(passenger) on ford gasoline engines.
Front O2's have a different connector than the rear ones so you can not plug a rear into the front without getting creative,but you can hook right and left up backwards.

As far as larger injectors and MAF sensors go you can have the MAF calibrated for the size injector you are running however this is fooling the PCM and although on a stock engine it would probably not hurt anything it is not as good as having your PCM programmed to really know what size injectors and MAF you really have.

The High idle could be an IAC sticking but it may also be the PCM commanding it because it sees a problem.

Ive noticed that when it sticks i can tap the throttle a few times and it starts to come down. why is that?

chuck943 · May 4, 2007

next time it sticks just tap IAC with a small hammer and see if idle comes down,if so it is probably sticking. Sometimes you can take it off and and clean the ports good with carb cleaner and it may fix it if not u will have to replace it
if tapping it doesn't bring it down then unplug it if it comes down then it is being commanded high.

i need help, have codes

BK_CAULEY

it's built for speed not longevity, woman

chuck943

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BK_CAULEY

it's built for speed not longevity, woman

RandyStinchcomb

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BK_CAULEY

it's built for speed not longevity, woman

RandyStinchcomb

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BK_CAULEY

it's built for speed not longevity, woman

RandyStinchcomb

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BK_CAULEY

it's built for speed not longevity, woman

RandyStinchcomb

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chuck943

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BK_CAULEY

it's built for speed not longevity, woman

chuck943

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