Mitsubishi Montero & Montero Sport This sport utility vehicle offers more size than the other Mitsubishi SUVs, but manages to keep a sporty look and comfortable feel, unlike many larger SUVs.

Engine stalling out

Old 02-20-2019, 10:35 PM
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Join Date: Aug 2018
Posts: 3
Default Engine stalling out

On montero sport 3.5....After replacing timing belt, cam and crank seals, cam and crank sensor, timing belt pulleys, timing belt tensioner, water pump, and thermostat due to oil leakage on alternator, which was also replaced, I boosted the battery turned over engine. It ran smooth with no leaks. I took it for a test drive. As I was driving the car seem to want to die when coming to a stop or slowing down. When I pulled in the driveway it stalled out. I turned it back over and pulled it in garage. It was missing as I was doing so and stalled out again. I check under hood everything look ok. After 5 min started it again. It idle smooth for bout 15 min and just shut off. This time I try to turn it over it at act like it didn't want to start.. after fighting with it will start up but stutter bad and stall out. When hit the gas it would backfire ah bit. So at that point it would either just turn over or start stutter and stall out. But if I wait a while and start it it would start and run normal for bout 20 sec then go back to doing same and stalling. What could be the issue. Theres no engine light at the time maybe cause battery died and I had to boost. Anybody got any steps to diagnose this issue

Last edited by Redrumrevolution1; 02-20-2019 at 10:38 PM.
Old 03-02-2019, 08:45 AM
Junior Member
Join Date: Aug 2018
Posts: 29

Start with the basics. Do you have fuel in the tank? It sounds like you may have run out.
Then go through the triad: Fuel, Spark, Compression. You have compression since it started. So look for spark. Look for fuel. Is the fuel pump running when you turn on the key (not starting)? Low fuel pressure can cause it to die.

Then go looking for unfortunately your own mistakes. Electrical connections--MAF/Map sensor connections are insanely easy to forget to reconnect or to not click into place. Idle Air controller, same thing. Check your alternator wiring. Did you do it right? Check your ignition wires and coils for proper installation--the wires like to short out onto the engine, right through their "insulation" and should therefore be floating over the cam covers, not touching them.
Old 03-02-2019, 08:54 PM
Join Date: Jan 2019
Posts: 90

Also, the fuel filter could be clogged. Have you ever replaced it? On my 94 Montero, it is located down under, on the frame below the driver's seat:
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