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Mercury Mountaineer Start Stall Idle Problems

24 messages,  Last post on Jun 01, 2009 at 3:28 AM

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#15 of 24 BG induction service by bh2000 Jun 02, 2008 (6:43 am)
I highly recommend an induction cleaning service. On many ford/mercury SUV's I have seen similar stalling problems and have chased them one by one, including cleaning the injectors, fuel filter, etc., depending on the codes. However the one thing that seemed to resolve the most frequent problem of stalling at a stop sign, whenever you take your foot off the gas pedal, was an induction service.   It is very important to keep your air filter clean, once carbon builds up in the intake manifold, your vehicle will begin to stall. The codes may not always point to the exact problem.   I recommend a BG Induction service if you have never had this done and your vehilce is over 65,000 miles. Replies to this message: pgskal31 (Nov 18, 2008 10:31 am)
#16 of 24 Engine Dies with Cruise Control by chasanthony Jun 26, 2008 (4:27 am)
Mercury Mountaineer 2004, AWD, V8. Bought this used with 40k miles on it. The engine dies (dead) when using the cruise control. Example, you are driving down the road at 40 mph and set the cruise control, several minutes pass by and suddenly the engine is dead. Most of the warning lights in the instrument cluster come on. Naturally you have to slip it into neutral or struggle to the side of the road, without power steering, put it in park and restart. It restarts everytime. This problem happens randomly however only when using the cruise control. It does not appear to be mileage or time related, in other words the engine can die after 5 miles of 10 miles of cruising, or it can die after 1 minute or 10 minutes of cruising. Outside temperature does not seem to matter, it could be cold or hot outside and it could die.   I've tried adding "gumout" and "fuel injector" fuel and tank cleaners. I don't sense the problem is fuel related but rather a gremlin in the engine management system that involves the cruise control.   I stopped at a local autoparts store that offers a free service where they will scan your OBII or whatever port that is with their scanner. NO codes showed up. I thought about borrowing or buying something I could hook up to the port to try to catch a code but don't know what to buy or borrow or whether the cars computer will be savvy enough to catch or remember the fault.   I have seen the same problem posted on the NHTSA website however can't find any recommendations.   Anybody else out there having an engine dies with cruise control problem? Replies to this message: Randy_74 (Dec 01, 2008 7:05 am) chasanthony (Dec 01, 2008 1:37 pm)
#17 of 24 Re: BG induction service [bh2000] by pgskal31 Nov 18, 2008 (10:31 am)
Replying to: bh2000 (Jun 02, 2008 6:43 am) I changed the battery on my 2004 Mountaineer and it hasn't been running good since then. It stalls at times when starting, at a stop sign, or in reverse. I've changed the air & fuel filters and spark plugs. Nothing comes up on the computer at the service station. I've tried Gumout but still have the same issue. Any ideas on what the problem might be?
#18 of 24 Re: Engine Dies with Cruise Control [chasanthony] by Randy_74 Dec 01, 2008 (7:05 am)
Replying to: chasanthony (Jun 26, 2008 4:27 am) 2004 Explorer 4.6Liter V8 doing the same thing. Any luck solving this problem? Replies to this message: chasanthony (Dec 01, 2008 1:37 pm)
#19 of 24 Re: Engine Dies with Cruise Control [Randy_74] by chasanthony Dec 01, 2008 (1:37 pm)
Replying to: Randy_74 (Dec 01, 2008 7:05 am) Randy, Nope. The engine still dies with cruise at slow speeds. I've never resolved the problem. However, I have been able to make it happen more often: Simply put it in cruise. Then go down a hill. As the engine rpms drop they keep dropping until somewhere under 500 rpms the engine will die, not all the time but very often.   I read a post where someone suggesting having the computer reflashed may fix the problem but my local Ford dealer closed up shop and I'd have to drive a distance, I think the other dealer quoted something under $100.00 to reflash the computer but would not guarantee a fix.
#20 of 24 02' Mercury Mountaineer AWD V8 Premier by qbn Jan 01, 2009 (12:06 pm)
I had this problem happened to me last week in the shopping mall parking lot. The car stalled and the signal displayed High Temp / Low Oil pressure like veryone stated here. The car started within seconds without any issues and I have been driving for a week now without noticing anything odd with the car. I have been buying regular 87 octane gas as suggested and buying from a very reputable station (BP).   This is my very first time encountered such odd problem with my Mountaineer. I bought this SUV used at 25K 3 years ago and now I have 83K on the odometer. I've been very pleased with the vehicle so far, well, besides the gas sipping happy.   I called the dealership and told them about the issue and they told me that they never heard of this symptom before. Of course, they suggested that I bring my vehicle in for inspection (-:   I will head down to my local Autozone to have them pull the code of the vehicle and see what type of codes they can pull from the vehicle. By the way, this is a free service provided by Autozone.   The other tging I can think of is, when did I replaced my fuel filter??? Not exactly sure, but I am going to have it replaced this Saturday for sure.   I really like the vehicle and I am not ready for any car payments at this time yet. So, I am going to find out what I can do before trading it in for some else.   Thanks for reading my post.   Have an awesome New Year everyone!!   Quincy
#21 of 24 98 4.0 moutaineer stalling by kcardwell Feb 28, 2009 (5:21 am)
Just broke 90k wants to stall when not under acceleration. Fuel pump was replace 6months ago . Sounds like intake may have leak ? Thought someone might know seeing how my MC is off until Monday!!
#22 of 24 Stalling and spitting by gkay May 31, 2009 (5:02 am)
No body that I see has found a cure for it yet. I have had this issue for about 3 months now. I have put enough Gumout and tektron in the tank to build a refinery.   I brought it to my mechanic today and he says it is my "MASS FLOW" sensor on the air intake/filter gizmo. He says its 250 or so. Last year I paid about 600 for him to clear the error light messages so I could pass inspection. $600 because he changed all air sensors one at a time!   Okay back to symptoms: The stalling comes and goes. Some times I am ready to have the SUV towed and then it may disappear for weeks. Always happens when you hold a steady pedal. That is why it dies when using Cruise Control.   Anyone else add to this? Gary
#23 of 24 Start Stall Idle Problems/ by kmmbrenizer May 31, 2009 (9:38 am)
Hello, We finally figured out why my 2004 Mercury Mountaineer was stalling. This was happening when I slowed down, it would just shut off and say low oil pressure. sometimes it would go into engine fail safe mode. My husband found a posting online. We brought it into Ford last fall 08 and they did 1500 worth of work but it started doing it again.   We brought it again with the bulletin he found online and they replaced the THROTTLE POSITION SENSOR. It has NOT happened in two months!!!! IF YOU ARE HAVING THESE ISSUES-get this checked! IT was $200 with parts and labor!!! Replies to this message: gkay (Jun 01, 2009 3:28 am)
#24 of 24 Re: Start Stall Idle Problems/ [kmmbrenizer] by gkay Jun 01, 2009 (3:28 am)
Replying to: kmmbrenizer (May 31, 2009 9:38 am) Thank for the info. Wow, isn't the internet great! Gary

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