Major trouble
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
Help me out here - how do you figure out that the MAF could effect each bank differently?
Help me out here - does the '06 still have the infamous PCV valve elbow at the right rear of the intake manifold?
Postmaster
Joined: Sep 2010
Posts: 3,472
Likes: 2
From: Southern Cal
With your loss of power, it could be a clogged Cat. This will throw you O2 codes in a hurry.
I've found that you normally don't get a sudden decrease but more of a gradual loss of power, sometimes so slow it's hard to detect until you try climbing that hill.
Have you noticed a continued decrease in power before now?
I've found that you normally don't get a sudden decrease but more of a gradual loss of power, sometimes so slow it's hard to detect until you try climbing that hill.
Have you noticed a continued decrease in power before now?
Transmission Rebuilder
Joined: Jul 2008
Posts: 1,570
Likes: 63
From: North Georgia
I have seen p0171 and p0175 before and its been a camshaft timing problem, like bad timing chain tensioners or sensors. You will need a good scan tool and someone who knows how to use it to find it. Camshaft timing problems can make the engine run very poor.
This being a 07 model you might have the 6R75 transmission, and if you do have trans problems it could get expensive, the last one I did ended up around 5k. Most cheap scanners will not retrieve trans codes anyways.
This is a 5.4 engine and the locations of the sensors that could be involved.
This being a 07 model you might have the 6R75 transmission, and if you do have trans problems it could get expensive, the last one I did ended up around 5k. Most cheap scanners will not retrieve trans codes anyways.
This is a 5.4 engine and the locations of the sensors that could be involved.
Fleet Owner
Joined: Apr 2008
Posts: 24,316
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From: 0,0,1
No, the codes are telling him he has a vacuum leak, the reving engine is telling him he also has a tranny issue.
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Freshman User
Joined: Nov 2013
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With your loss of power, it could be a clogged Cat. This will throw you O2 codes in a hurry. I've found that you normally don't get a sudden decrease but more of a gradual loss of power, sometimes so slow it's hard to detect until you try climbing that hill. Have you noticed a continued decrease in power before now?
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Freshman User
Joined: Nov 2013
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A vacuum leak that I can't find. I've changed vacuum hoses and fittings that go on them.
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Freshman User
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QUOTE="pdqford;13711466"] Help me out here - does the '06 still have the infamous PCV valve elbow at the right rear of the intake manifold?[/QUOTE]
No it's on the left rear.
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Freshman User
Joined: Nov 2013
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I payed 50 bucks for a mechanic to leave his shop and put a real scanner on it. 2000 dollar one according to him, touch screen the whole deal. That's how I got a fuel pressure test done for running and not running. According to him all 4 of my cylinders on bank 1 passenger side were fine. But on bank two 5 and 6 weren't firing and 8 was firing "weak", got confusing to me since that side is the one that's running rich!!! Anywho I took a risk of pulling out the spark plugs without breaking, and got all 4 out. Stuck new ones in with no change. So much for the "high dollar" scanner.
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
No, the two codes you posted, P0171 and P0175 have to do with Bank 1. With 2 misfiring cylinders and a weak 3rd one, I'd say you really need to address that before anything else. A misfire doesn't mean a bad spark plug. It can be a bad COP, fuel injector, a break in the wiring, a corroded connector, a blown head gasket between 5 & 6, or a sticking valve. The problems you're having on Bank 2 are what's causing the codes to appear for Bank 1 because of the addition of raw fuel into the exhaust system affecting the O2 sensors.
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Freshman User
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No, the two codes you posted, P0171 and P0175 have to do with Bank 1. With 2 misfiring cylinders and a weak 3rd one, I'd say you really need to address that before anything else. A misfire doesn't mean a bad spark plug. It can be a bad COP, fuel injector, a break in the wiring, a corroded connector, a blown head gasket between 5 & 6, or a sticking valve. The problems you're having on Bank 2 are what's causing the codes to appear for Bank 1 because of the addition of raw fuel into the exhaust system affecting the O2 sensors.
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Freshman User
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And again p0175 for my truck is bank 2 too rich. That's what the code says. Not bank 1. Not understanding how it's too rich if fuel injectors aren't working and your listings them as a focus area.
Super Moderator
Joined: Jan 2008
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From: Maine, Virginia
I hate to say this in hindsight but, for what you've spent to no avail, a dealer could have diagnosed the issue and pointed you in the right direction already.
Find a dealer, it doesn't even have to be a Ford dealer anymore. All new car dealers work on all makes and models.
Find a dealer, it doesn't even have to be a Ford dealer anymore. All new car dealers work on all makes and models.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
At first I was only getting a p0171 codes and we looked that up it clearly says if two codes are thrown to check fuel pressure or maf sensor one of the two. Sure enough after running another scan the other p0175 code got thrown with the p0171. This is my reason for changing/checking these things.
Is that the engine's left rear (driver's side)? Or is it on your left as you face the engine (passenger side)?