2006 Limited V6 Rough idle/bog under load

[ke5rto]

Greetings! My name is Brian, and I have been looking through this forum for the last week trying to troubleshoot an issue I am having with an Explorer I recently purchased without much luck.

I have an 06 Limited V6 2WD with the 3.55 rear gear and 76K miles.

On idle, the engine has a steady miss and under load and cruise conditions the miss still exists and it is greatly affecting the fuel economy.

After I purchased it, I had the fuel injection system flushed at my local dealership to see if this would remedy the solution, however afterwords the situation still remained.

I then purchased a new coil pack(Screamin' Demon), plug wires (Bosch 8mm), Autolite Double Platinum plugs (Gapped to .062), K&N Air filter, and a Motocraft Fuel filter. After performing this work, the problem still exists.

The Motocraft Platinum plugs(AGSF 24PGM) that were there looked normal for cylinders 1-3, but on cylinders 4-6 the center electrode was more rounded and there was a white ash residue on the ground indicating that it might have been running a bit lean.

I hooked my laptop up to the Explorer and monitored the O2 voltages for both banks, and bank 2 stayed between .675V and .745V while bank 1 varied between .008V and .721V. (I use ProScan software to monitor the engine and varied the RPMs during the test).

I also disconnected the battery and let it sit overnight to reset the PCM and the problem still exists after driving it around for 40 miles.

I am assuming that maybe the O2 sensor may be causing my issue but before I drop $95 for FORD to tell me that or $80 to buy a new O2 sensor I wanted to get some other opinions.

Thanks!

Brian

 

[Davidm53]

You should use Motorcraft plugs, SP 412 on the V6, I would use the Motorcraft coil pack and plug wires also.
My EB has 78,000 miles and I did the factory plugs and fuel filter. It was running fine other than the acceleration was not smooth at times.
Cleaned out the TB with seafoam spray also.
Not sure what your problem is, but those items have helped mine.

 

[vipersinu2]

see if new plugs are the same length as your old plugs. this happed to me and truck ran like crap.

 

[ke5rto]

I will take a look, but the point is that it ran like crap BEFORE I changed everything (Which needed to be changed) and it still runs like crap.

 

[ke5rto]

Pulled the Autolite double platinums and replaced with SP412. Noticeable improvement now and is firing on all cylinders again. And yes, the plug was about 1/2 shorter than the factory plugs....crazy.

I took it for a drive and monitored the engine outputs for about 10 minutes and everything seemed a little off still. When I pulled into the driveway, I pulled up the DTC page in the software and noticed that I had a permanent failure code listed - P1100.

So, I guess that I need to go pick up a new MAF sensor since it is has intermittent problems. That could be what is causing some of my issues that led to it needing a tune-up.

 

[vipersinu2]

how are you using your laptop on the truck. I am instrested in doing that also?

 

[Davidm53]

Glad the new plugs helped. I also have the CRC MAF cleaner spray can. For $5-6 bucks it's worth a try, it cleans the element.

 

[ke5rto]

how are you using your laptop on the truck. I am instrested in doing that also?

I bought software and a USB-ODBII adapter called ProScan from this website:

http://www.myscantool.com


I had some electrical connector cleaner, which I used on the MAF itself and the connectors and that did not seem to correct the issue.

I am going to go to Advance Auto and get a new MAF and see if that corrects the problem.

 

[vipersinu2]

I tried three mass air flow sensors from autozone and none of them worked well. each sensor made the truck run different I had to get a ford mass air flow sensor. the dealer charged me 200.00. I would look around for a "new ford" on ebay.