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  #1  
Old 03-30-2010, 04:53 PM
wvcat wvcat is offline
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Default Opinions on 4 codes

On the 01 3.0 I just bought it has 4 codes. P0174, 304,305, 306...any ideas?
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  #2  
Old 03-30-2010, 05:35 PM
Jp7 Jp7 is offline
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Default Re: Opinions on 4 codes

Quote:
Originally Posted by wvcat View Post
On the 01 3.0 I just bought it has 4 codes. P0174, 304,305, 306...any ideas?
No opinions, just fact. You have misfires on 4, 5 and 6. That bank is also running leaner than your computer likes to correct for.
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  #3  
Old 03-30-2010, 06:55 PM
littleblue littleblue is offline
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Default Re: Opinions on 4 codes

Here is Fords opinion:

P0174 - System to Lean (Bank 2) The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. See Possible Causes for DTC P0171. See Diagnostic Aides for DTC P0171

(Possible Causes for DTC P0171 For lean and rich DTCs
Fuel system
Excessive fuel pressure.
Leaking/contaminated fuel injectors.
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Vapor recovery system.
Induction system:
Air leaks after the MAF.
Vacuum Leaks.
PCV system.
Improperly seated engine oil dipstick.
EGR system:
Leaking gasket.
Stuck EGR valve.
Leaking diaphragm or EVR.
Base Engine:
Oil overfill.
Cam timing.
Cylinder compression.
Exhaust leaks before or near the HO2Ss.

P0301 through P0310 - Misfire Detection Monitor The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. Ignition system
Fuel injectors
Running out of fuel
EVAP canister purge valve
Fuel pressure
Evaporative emission system
Base engine
The MIL will blink once per second when a misfire is detected severe enough to cause catalyst damage. If the MIL is on steady state, due to a misfire, this will indicate the threshold for emissions was exceeded and cause the vehicle to fail an inspection and maintenance tailpipe test.
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  #4  
Old 03-30-2010, 07:00 PM
Jp7 Jp7 is offline
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Default Re: Opinions on 4 codes

Quote:
Originally Posted by littleblue View Post
Here is Fords opinion:

P0174 - System to Lean (Bank 2) The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. See Possible Causes for DTC P0171. See Diagnostic Aides for DTC P0171

(Possible Causes for DTC P0171 For lean and rich DTCs
Fuel system
Excessive fuel pressure.
Leaking/contaminated fuel injectors.
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Vapor recovery system.
Induction system:
Air leaks after the MAF.
Vacuum Leaks.
PCV system.
Improperly seated engine oil dipstick.
EGR system:
Leaking gasket.
Stuck EGR valve.
Leaking diaphragm or EVR.
Base Engine:
Oil overfill.
Cam timing.
Cylinder compression.
Exhaust leaks before or near the HO2Ss.

P0301 through P0310 - Misfire Detection Monitor The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. Ignition system
Fuel injectors
Running out of fuel
EVAP canister purge valve
Fuel pressure
Evaporative emission system
Base engine
The MIL will blink once per second when a misfire is detected severe enough to cause catalyst damage. If the MIL is on steady state, due to a misfire, this will indicate the threshold for emissions was exceeded and cause the vehicle to fail an inspection and maintenance tailpipe test.
Yeah just what I said...
__________________
Looking for a professional retrofitter to add HIDs or LEDs to your Ranger? PM me if your looking to have work done, and have cash to spend.

Quote:
Originally Posted by FireRanger View Post
I'm dying to see this at night. Someone go tell the sun to give up already.
Quote:
Originally Posted by beef08 View Post
Your the man, you bring our dreams to a reality within the lighting spectrum
Quote:
Originally Posted by BCobe View Post
Jp7 you always do AMAZING work! Hats off to you sir
Quote:
Originally Posted by FireRanger View Post
People so often confuse "hating" with "knowing better".
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  #5  
Old 03-30-2010, 07:21 PM
wvcat wvcat is offline
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Posts: 836
Default Re: Opinions on 4 codes

Thanks for the info. When I bought the truck I figured a burnt valve but I didn't figure 3 cylinders were missing so it kinda makes me rethink my initial diagnosis. Seems odd that it would burn 3 valves on the same head(not like it couldn't happen, just unusual) The PO gutted the cats because he thought they were the problem($%#@) He also installed a new coil pack, plugs, wires, and cat back exhaust.I haven't had much time to check things out but did notice a new pcv valve so someone must have been on the vacumn diagnosis track.... I should have more time tommorrow to check it out.
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  #6  
Old 03-31-2010, 05:16 PM
bigmacnro bigmacnro is offline
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Thumbs up Re: Opinions on 4 codes

My P0171 diagnosis was a vacuum leak. A hose near the air intake was spliced. I had the egr code also.
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  #7  
Old 03-31-2010, 05:39 PM
wvcat wvcat is offline
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Default Re: Opinions on 4 codes

Update!

Well sometimes you just get lucky....lol

I pulled the upper intake to look for problems and I found 1 fuel injector without the plug even in place and another that had the rubber seal blocking the connection. I bolted the intake back together and took it for a spin and guess what ....it runs good...no miss

Its not missing but if you rev it past 3000 it acts like something is cutting out and causeing a miss but when you drive it its smooth way past 3000 rpms. Its not idleing perfectly smooth but I was thinking maybe the empty convertors could be causing it. I'll swap out the convertors and see what happens...
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  #8  
Old 07-28-2010, 12:16 PM
Revelli Revelli is offline
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Default Re: Opinions on 4 codes

I have this exact odd problem with my 4.0L Ranger, runs great with high rpms, however rev'ing at 3,000 rpms it misses and feel like a washing machine. Did you ever find the cure for your problem, which seems like the same for mine. Thank you
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  #9  
Old 07-28-2010, 01:09 PM
RangerNDog RangerNDog is offline
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Default Re: Opinions on 4 codes

Quote:
Originally Posted by Revelli View Post
I have this exact odd problem with my 4.0L Ranger, runs great with high rpms, however rev'ing at 3,000 rpms it misses and feel like a washing machine. Did you ever find the cure for your problem, which seems like the same for mine. Thank you
I don't know what year it started but with the auto's if you have it in Neutral or Park their is a limiter that kicks in at 3000RPM. The only way to get rid of it is with a tuner.
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  #10  
Old 07-28-2010, 01:21 PM
Revelli Revelli is offline
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Default Re: Opinions on 4 codes

Thank you for the answer, that would explain a lot.
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  #11  
Old 07-28-2010, 02:10 PM
wvcat wvcat is offline
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Default Re: Opinions on 4 codes

yep...what he said...lol
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