Question about Mitsubishi Passenger
I have a 1999 mitsubishi chariot gdi. the problem is it starts but cuts out within 10 second start. my mechanic cant find the problem to fix it. The car is also running to rich & the spark plugs keep going black. The mechanic scaned the computer & only the airflow meter 7 the throtle body came up but that has all been checkd & those parts are fine. Can you help me solve my car problem. thanks. cheers!
Hi, I have a Mitsubishi Chariot Grandis Exceed 1998 (4g64) and recently changed the engine. Prior to changing the engine the car had a shudder when driving approximately 70kmph. This appears to be caused by some sort of misfire as one can see the ref counter dropping and picking up slowly. After changing the engine I still have exactly the same problem which tells me it is not the engine. I took it in and they tested it with one of those plug in machines but to no avail as it did not pick up any faults. Due to the slight drop of the needle prior to the car shuddering, I cleaned out the injectors but this does not appear to be a part of the problem. This usually occurs more often when the engine is warmer and not when one start up and drive. Any ideas what can cause this?
Posted on May 24, 2010
Looking at the valve mechanism of most mitsubishi, they are hydraulically adjusted by engine oil pressure. Running temperature has a significant role as the engine. Observing the nature of your problem it has to do with temperature rise of engine oil and viscosity of oil is affected, therefore check the following:1. engine oil pressure- maybe oil pressure drops to an extent that it cannot offer proper actuation of the valve adjusters, 2. engine oil filter- too much restriction, 3. sticking valves or adjusters due to temperature rise hence rendering valves not closing or opening as per required in performance, 4.try to swap ECU with a similar engine. 5. grade of oil, 6. oil pump performance.
Mostly important start with the least difficult repair procedures to more complicated ones. Am so sure that problem has to do with temperature rise of the engine and engine operations are affected causing it to stall.
Also check sensors that sends informs to ECU, e.g oxygen sensors in the exhaust system, maybe they are sending a wrong signal to ECU such that the ECU 'leans' the air/fuel mixture into the engine to an extent that is cannot burn as required hence stalling.
Posted on Dec 25, 2012
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