Montero 4WD 3.5L
- runs well until taking a longer trip on hots days with stress on engine.
I am living out of the States now, and am having a hard time pinning down this problem. My Montero works fine around town and on short drives (responds well and idles well), but anything over twenty minutes or so (depending on how many mountains we climb) causes the motor to occasionally stall when I try to accelerate. More often, though, it will simply not respond at all when I press the gas. I would not even describe it as sputtering. It simply does nothing for a few seconds.
Here are a few other clues that seem significant: The problem appears to be related to outside temperature (when it rains, I have few to no problems, regardless of distance). Also, if I shut the motor off and and restart it, the problem goes away for five minutes or so (as though something is "reset").
I have replaced the fuel pump and recently installed an used Mass Air Flow Sensor, but the symptoms still occur. Other routine things, such as air filter and spark plugs, have all been well maintained. Because the problem only occurs on long trips (and because my Spanish is not great) it has been very difficult to have a mechanic diagnose it. Thanks for whatever advice you can give me.
have the same problem?
Friday, May 27th, 2011 AT 10:06 PM