Multiple Problems 2007 F150 - HELP!!
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Multiple Problems 2007 F150 - HELP!!
Ok, so I bought a used 2007 F150, 5.4 with 102k miles. I drove it 13 miles off the lot and it crapped out.....cam phasers.
After 3 tries, the car lot finally got that problem solved. I picked the truck up and drove it 56 miles and this is where is still sits because my mechanic cant figure out what to try next.
So the cats were completely melted and clogged. Cleaned those out and welded them back up (yes, they are hollow). Changed all injectors, changed all plugs, changed fuel filter, cleaned MAF.
Now here is where it gets tricky....you ready?
Throwing codes P0451 for the evap emission control system, and codes P2198 and P2196 for the o2 sensors.
Replaced the o2 sensors tonight and reset the codes, AND THEY ARE STILL READING BAD!
What is causing this? Bad ECM? Im at my wits end with this truck. Suggestions appreciated!
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The dealer has done none of these repairs, and yes, the cats are hollowed out. Lets imagine for the time being that this is an off-road truck. Would the cats being hollow effect the way it is running?
Forgot to add: It runs fantastic during open loop, but as soon as it hits closed loop it goes to crap.
Forgot to add: It runs fantastic during open loop, but as soon as it hits closed loop it goes to crap.
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Yes, THAT part was clear.
However....
That part wasn't clear. You never said you did the repairs, so because "the car lot finally got that problem solved" (the cam phasers), the way your post read, the car lot did the other repairs too.
Specificity and clarity helps when you're describing what happened!
Lack of a catalytic converter, whether because of a long tube header, removed and straight piped, or gutted, will affect the downstream 02 sensors and will cause driveability problems.
Yep, that's because you gutted the cats.
Open loop fueling is off of the MAF and the fueling tables. It's my understanding that's a timed event until the vehicle goes into closed loop, at which time the fueling is controlled by the 02 sensors.
For your evap control DTC, check your gas cap and make sure it's sealing properly.
Stewart
However....
The dealer has done none of these repairs
Specificity and clarity helps when you're describing what happened!
Lets imagine for the time being that this is an off-road truck. Would the cats being hollow effect the way it is running?
Forgot to add: It runs fantastic during open loop, but as soon as it hits closed loop it goes to crap.
Open loop fueling is off of the MAF and the fueling tables. It's my understanding that's a timed event until the vehicle goes into closed loop, at which time the fueling is controlled by the 02 sensors.
For your evap control DTC, check your gas cap and make sure it's sealing properly.
Stewart
Last edited by Stewart_H; Oct 25, 2013 at 01:19 AM.
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Stewart
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They are MagnaFlow OE. Not direct fit. Will this make a difference?
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I test drove the truck and it was fine, then I went back and paid for the truck, drove it 13 miles and then it went to crap. Why do you ask?
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There is not set time for the phasers to go bad. Once they start going bad, they just go.....which is what im finding out.
Had mine towed to the garage today and had the cats put on. shop said the fuel pump control module was bad. They had the truck running fine and then it got hot and crapped out again. They are diagnosing it again.
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My tick was comming from the bottom of the motor sounded like. The injectors sounded fine. Still not sure what it was. The Chevy dealer I got it from might have put the wrong weight oil in. It had a AC Delco filter on.. so I think that was the problem lol.
I flushed the motor and put Motorcraft filter and oil in. Also ran a can of seafoam through the tank with a new fuel filter. Sounds new now.
I flushed the motor and put Motorcraft filter and oil in. Also ran a can of seafoam through the tank with a new fuel filter. Sounds new now.
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The tick might be a bad injector.
There is not set time for the phasers to go bad. Once they start going bad, they just go.....which is what im finding out.
Had mine towed to the garage today and had the cats put on. shop said the fuel pump control module was bad. They had the truck running fine and then it got hot and crapped out again. They are diagnosing it again.
There is not set time for the phasers to go bad. Once they start going bad, they just go.....which is what im finding out.
Had mine towed to the garage today and had the cats put on. shop said the fuel pump control module was bad. They had the truck running fine and then it got hot and crapped out again. They are diagnosing it again.
once you go closed loop, the PCM uses O2 sensor input to finely tune the strategy. better performance and MPG's...in theory.
anyways, your cats aren't doing the job (because hollowed out) and/or the aftermarket cats aren't up to snuff. again, this pisses the O2 sensors off and causes issues with the PCM.
you can fix this 2 ways:
1. install OEM catalytic converters in the exact same spot
2. buy a SCT handheld programmer and buy a custom PCM tune that turns off the rear O2 sensors. Several tuners offer this option.
2. buy a SCT handheld programmer and buy a custom PCM tune that turns off the rear O2 sensors. Several tuners offer this option.
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it's the cats. the O2 sensors are ignored while in open loop and the PCM fuels the motor based on tables
once you go closed loop, the PCM uses O2 sensor input to finely tune the strategy. better performance and MPG's...in theory.
anyways, your cats aren't doing the job (because hollowed out) and/or the aftermarket cats aren't up to snuff. again, this pisses the O2 sensors off and causes issues with the PCM.
you can fix this 2 ways:
once you go closed loop, the PCM uses O2 sensor input to finely tune the strategy. better performance and MPG's...in theory.
anyways, your cats aren't doing the job (because hollowed out) and/or the aftermarket cats aren't up to snuff. again, this pisses the O2 sensors off and causes issues with the PCM.
you can fix this 2 ways:
1. install OEM catalytic converters in the exact same spot
2. buy a SCT handheld programmer and buy a custom PCM tune that turns off the rear O2 sensors. Several tuners offer this option.
2. buy a SCT handheld programmer and buy a custom PCM tune that turns off the rear O2 sensors. Several tuners offer this option.
When the truck did the exact same thing, the garage flashed the computer and reprogrammed it. It ran fine and then dropped the program. Computer will be in on Monday.
I do appreciate the advice though. I may end up buying a tuner. Any recommendations on brand?
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