Engine Exhaust System Problems of Mercury Mountaineer

The exhaust system from the catalytic converter disengaged.

See all problems of the 2006 Mercury Mountaineer 🔎.

On local street at about 25-30 mph. #2 sparkplug blew out from cylinder head. It sounded like a blown exhaust gasket. After arriving home have found that plug was blown out breaking the coil and exposing the eng to a possible fire from the arcing. This was original sparkplug installation.

See all problems of the 2002 Mercury Mountaineer 🔎.

Dt:the consumer stated during braking the vehicle stalls. When the cvonsumer went to restart and put it in drive it stalled again. Took vehicle to the service department 3 times. The second time they replaced the fuel pump, the first time they updated the engine controller software. For the 4th time total loss of vehicle power when braking from 55 mph. Dealer replaced maf sensor. Driver rear door molding catching front door molding at times when opening.

See all problems of the 2004 Mercury Mountaineer 🔎.

Vehicle releases extremely bad/ over powering sulfur smell at uneven intervals while driving or stopped. It can even be smelled inside the cabin. Happens 5 or 6 times on a normal day. Mercury says they are aware of problem and had it on a few other vehicles, but don't know how to fix it. Mercury told me to switch brands of gas- that has not worked.

The first time the transmission problem happened while I was driving on I-275 going to jury duty. It was rush hour, stop & go traffic. I was excellerating and at approximately 60 miles per hour, the truck like "slammed" into gear. It started me & I thought I had been rear-ended. I contacted the dealer on my cell phone and asked to bring it in. I was told since I was in jury duty, I would have to wait until my service ended and then bring it in. I asked if the transmission or drivetrain could further damage & was told no. I was afraid to keep driving it but did not have a choice at the time. I kept track of the times the truck "slammed" into gear which up until the time I took the vehicle in, was when the vehicle was warm & it was on excellerations at different speeds & times. The service people said it did not do it while they test drove it but Ford's knew there was a problem with it & the repair was to reprogram the computer chip & that would fix the problem it did not. I had to re-schedule an appointment for another attempt to fix it. This time the dealer placed a recording device on the truck & were able to capture it acting up. The service person told me I needed a new transmission & that's what he'd like to do to repair it but I'd have to wait until Ford's retrieved the data. I was concerned about driving the vehicle and it only had 800 miles on it! while waiting for a determination, I had driven the vehicle about 6 or 7 miles and an awful odor filled the cab. It smelled like something burning under the vehicle. I pulled over & checked under the truck for a fire. I did not see anything that looked like it was burning. I called the dealer & complained again about it slamming into gear & now the awful smell. I wondered if the transmission was burning. I was told it was another complaint others made as well. It was coming from the exhaust (valve?) for the 3rd try, these 2 issues & others are now being repaired. Dt.