Ford Mustang Forum banner

2006 Mustang GT engine bog at WOT and briefly cruising

6474 Views 11 Replies 4 Participants Last post by  cman
2006 Ford Mustang GT

I have finally decided after a long time of struggle with my car to come to the place where my answer may lay. I have been struggling with engine trouble codes thrown:

P0148= fuel delivery error
P0171/P0174= system too lean bank 1/2
P1000= OBD System Readiness not complete
P2195= O2 sensor signal (this may be caused from the cats not being in place)

I have a Predator tuner that is on the original tune as of yesterday, coming from a modified stock tune. I will be cruising along on my 63 mile one way commute on the interstate when I will get a slight area of rough running and flutter for a 5-10 second period then it returns back to normal, this usually comes when going up a overpass but that isn't always the case. Keep in mind my cruise is typically set around 75-80MPH. But I notice that 3/4 throttle it runs strong, but as soon as I go WOT, it starts bogging down and acts like I do not have the right air/fuel ratio (as if its too much gas or too much air dumping in past 3/4 throttle).

I am on stock tune and I am running 87 octane fuel. I have a cold air intake, a leak on the passenger side (bank 1) exhaust manifold (don't know if that effects anything), I also have no cats and magnaflow exhaust.

My guess of problem is (and I am no mechanic lol):
I think maybe this whole thing is just an air/fuel issue
The CAI on a stock tune causing mixture ratio issues
The leak in the passenger side exhaust manifold where it bolts to cylinder 4 (ordered replacement)

As far as the type of cold air intake, I wish I knew which one it was, I will post a picture to see if anyone knows which kind I have (bought the car used).

Help appreciated.
1 - 1 of 12 Posts
Certainly can't hurt to clean/replace all the usual things like MAF, throttle body, fuel filter, and spark plugs. I replaced my original plugs at about 90,000 kilometers and they were completely worn out (more than .080 gap) not sure how the car even ran as good as it did. If you have never had the plugs out of your car, bush up on the removal process, as many are aware of the difficulties in getting them out without breaking them off in the head.

IMO the first thing you need to do is identify that CAI and get an appropriate tune from a top notch tuner like Brent at Brenspeed. If your tune is not right, all the cleaning and maintenance in the world is not going to solve your problem.
1 - 1 of 12 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.