primalurges

Yeah my codes P0174 & P0308 are gone and the truck is driving fine now (I was having drivability issues every day the minute the P0174 showed up). You never mentioned the mileage on your ride or if you noticed any performance issue. My first COP went at 49K and gave me a P0306, and this last one went at 61K, and initially gave me a P0174, and while the truck started stumbling around at about 50MPH, I gunned it, started to here the back fire and it eventually threw the P0308. From my experience, these COPs don't just die, they start to crap out little by little and only when you start driving it hard while it stumbles that you get the missfire code that identifies the cylinder with the bad cop. Given that I've already had two go out less than a year apart, I can only assume that's howlong these things last and can expect the rest to start dropping like flies. Good luck

goracer

I was going to get the hi performance Eccel (can't get MSD for 3v) set but I haven't compared discounted oem price and performance, to see if it's worth it.

http://www.summitracing.com/parts/ACC-140033-8/

No performance issues. Aproximately 98k miles so far. Can you tell me where the related COP is to bank 2? I would like to swap COP's it and test for failure.

Holly crap, you can buy two Eccel sets and still have over $100 in change left over compared to the OEM dealer cost set! Ok, with the oeford discount, the Eccel's are still about $70 cheaper a set. ...does anybody know if the Exccel's are actually "higher" performance?

primalurges

Bank2 is the driver's side and in my case coil#8 which is the one closest to the firewall went bad but i assume it would have produced the same lean code anywhere on that side. A simple test would be to swap all the coils from bank 2 with all the coils from bank 1 and clear your codes. I fyou start to receive the lean code on the other bank then one or more of your coils on that side should be your problem. If that doesnt work try swapping your O2 sensors to the opposing bank as well. If that doesnt do it maybe its an injector or manifold gasket.

goracer

^ oh bank, as in side or row of. I thought it was like # 2 cylinder and I wasn't sure how they were numbered. If I would have known, I would have swapped banks over the weekend. Well, Sunday after the rain stopped.

I have a set of Eccel COP's that should be here tomorrow. I will replace all of them this weekend, if not bank two when I get them.

I thought if it was one cylinder then why can't it be narrowed down to one injector (itself or o-rings), gasket leak, plugs were placed so isn't that. I replaced the quick release vacuum line on the drivers side.

One weird thing I remember is the mechanic kept saying their was a lot if interference when he tested the O2 sensor and also said it was running extremely rich which makes absolutely no sense with a lean error code.

goracer

I was able to swap out the drivers bank COP's and rear O2 sensor before work. So far no code but I only did less then 25 miles.

goracer

New COP's and O2 sensors did not resolve.
OBD-II Trouble Code: P0174 System Too Lean (Bank 2)

* What does that mean?
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

>> Too much oxygen in the exhaust? Can this be caused by a stupid missing nut on my exhaust manifold?


* Causes A code P0174 may mean that one or more of the following has happened:

• The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled.
• There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
• There could be a vacuum leak downstream of the MAF sensor.

goracer

Resolved:
Woot (back flip), vacuum leak at header to collector. The part of the pipe that is mandrel bent then has the rotatable flange that mates up to the exhaust manifold's flange. This was at an angle which made me wonder if any gaps would suck in air cause a false vacuum leak error code from the 02 sensor. The muffler guy said no. I said fixt it anyhow, unless you don't like money. He used a stethiscope and heard a leak. He then cut, reangled and welded back the pipe. The flange is now level compared to the exhaust manifold flange. It's been about 75 miles with the edge and another 75 after returning to stock but no reseting the ECU. The error code has not returned.