06 Mountaineer Will not Accelerate.. What do you think?

80

Asked by ThaFisher Feb 03, 2019 at 01:43 PM about the 2006 Mercury Mountaineer Premier AWD

Question type: Maintenance & Repair

My 2006 Mercury Mountaineer V8 is having what I believe is multiple problems..
First when I start the vehicle it will sit there just fine and idle, then when I move it into Reverse or Drive it starts idling
very badly up to the point where it will actually stall. Unless of course I move it back to Neutral or Park before it
manages to stall.
Then after letting it run and idle a bit in the driveway I was able to get it to not stall while in Drive so I took it around
the neighborhood and now it's at a point where If I try to accelerate it feels like It's not registering that I'm pushing the
pedal, basically leading to me having to accelerate VERY (it's un-driveable) slowly to get up to maybe 20-30mph and
then once you're around those speeds and you try to accelerate further the RPMs rev high and you gain speed at a
very slow rate. I haven't gotten it over 40mph since this issue started.
I've had the codes scanned multiple times but I actually have a ton of codes, some have to do with O2 Sensors,
some have to do with Retarded Timing, Most of them are misfires in random cylinders. (I've changed plugs, and
coils)
I've changed the Fuel filter recently, I've cleaned the Throttle body recently, I've cleaned the MAF sensor.
Extra info - Good on oil, no overheating, even before this problem started it always ran sluggish and guzzled gas..
Thanks!

2 Answers

80

Now I have the codes listed. Alot of things point towards 02 Sensors but I'm skeptical about it being them. I'm getting the following codes. p0174 - System too lean (Bank 2) p0012 - Intake Camshaft Position Timing - Over Retarded (bank 1) p0016 - Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor A p0053 - H02S Heater Resistance (Bank 1, Sensor 1) p0059 - H02S Heater Resistance (Bank 2, Sensor 1) p0128 - Coolant Thermostat (Coolant Temp Below thermostat regulating temp) p0132 - 02 Circuit High Voltage (Bank 1, Sensor 1) p0171 - System too lean (Bank 1) p0300 - Random Misfire p0301 - Cyl 1 Misfire p0302 - Cyl 2 Misfire p0303 - Cyl 3 Misfire p0304 - Cyl 4 Misfire p0307 - Cyl 7 Misfire p0351 - Ignition Coil A Primary/Secondary Circuit p0353 - Ignition Coil C Primary/Secondary Circuit

1 people found this helpful.
10

I had similar issues with my 08 Mountaineer. Replacing the throttle assembly was expensive, but it did the trick.

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    860
  • #2
    taver91
    Reputation
    570
  • #3
    kbro
    Reputation
    550
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford Explorer
53 Great Deals out of 2,231 listings starting at $7,990
Used Ford Expedition
18 Great Deals out of 682 listings starting at $5,650
Used Ford F-150
363 Great Deals out of 12,802 listings starting at $599
Used Nissan Xterra
29 listings starting at $7,799

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.