Question about Mitsubishi Montero
I have been experiencing the same problem in the same model upon checking the fault codes I've found the temp sensor, crank, and cam sensor error codes.
I've been aware of the temp sensor for sometime the other two error codes are new and go with the problem getting worse - about to replace the temp, the local agent said he's aware of this and often this is the issue with the fuel mixture becoming incorrect due to the spike in the temp sensor after a run.
I'll fix this first and see what error codes remain, and how the problem is affected.
Posted on Jun 30, 2012
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Posted on Jan 02, 2017
The fuel pump would have nothing to do with spark. A scan of the computer should reveal the problem area--suspect either a bad crankshaft or camshaft sensor. You could also have problems in the ignition system itself. Good luck!
Posted on Mar 13, 2010
SOURCE: My car is a 1997
Hi, an intermittent poor idle can be caused by certain valves that are perhaps not always closing properly. Three valves I would check are the EGR, purge, and idle air control valve. The EGR valve can get dirty and start to jam. The purge valve sometimes gets charcoal coming thru the line from the vapor cannister, and the charcoal can hold the valve open when it's supposed to be closed. The idle air control valve is the valve that is supposed to control your idle. If it is not opening properly, the car will not idle right. I explain a lot of this in the following post: http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel
On your car, I am not sure which emission controls are installed. If you have evaporative emission laws, you will have a vapor cannister somewhere in the engine compartment. I believe the purge valve is atop the cannister on the Pajero. Pull the hose off to see if there is charcoal in it. Also look inside the valve where you pulled the hose off to see if it is closed.
There are pictures below of the idle air control valve and the EGR valve. The idle air control valve is mounted on the throttle body, near where the cables from the accelerator pedal attach to the engine. Take the valve off and see if it needs cleaning. Also clean out the passages in the throttle body. Use carburetor cleaner to clean these parts. Also clean out the inside throttle body, if dirty.
Finally, if these valves seemed to be OK, take off the EGR valve and clean it out. Make sure it closes by default. If not, replace it. Please let me know if you have questions, and thanks for using FixYa.
Posted on Feb 07, 2011
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