Question about 1990 Mitsubishi Mighty Max

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91 Mitsubishi Mighty Max stalls during acceleration

It starts and idles fine, but while acceleration out of 2nd into 3rd, it struggles to go. It will stall completely unless I go back to 2nd gear. It also pulls hard to one side, so I thought maybe the brakes where sticking, but they are fine. It has a new clutch kit, so I made sure the pressure from the clutch pedal was adjusted correctly, and it was. I checked the transmission fluid level, it was fine.

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Try changing your fuel filter, like on all fuel injection and electronic ignition problems the shade tree has to use the process of elimination. This is one of the cheapest.

Posted on Apr 08, 2009

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Mitsubishi mighty max


If your vehicle is fuel injected, Which I suspect that it is; It is HIGHLY DISCOURAGED to pump the accelerator pedal while starting--- This can cause a fuel flooding condition.

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Dec 12, 2012 | 1992 Mitsubishi Mighty Max

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Please confirm which engine your truck has; 3.0 V6?

Thanks,
Tom

Feb 28, 2010 | 1991 Mitsubishi Mighty Max

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Engine won't idle. when it goes to idle motor


Throttle position sensor, check this out. Also try cleaning the throttle body with throttle body cleaner may be all it needs'

Feb 13, 2010 | Mitsubishi Diamante Cars & Trucks

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91 mighty max wont start when cold


Next time when cold and it will not start remove a spark plug or two and see if the engines flooded. If so there are two things that come to mind; 1, worn injectors, leaking as engine sits with time causing difficult starts 2: bad oxygen sensor, if failed engines tend to run rich and the ECU may have your injectors pump heavy amounts of fuel to keep from running lean; often times you'll see poor fuel MPG if O2 sensor failed.

I hope this may have assisted you,
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Oct 30, 2009 | 1991 Mitsubishi Mighty Max

2 Answers

89 mighty max, has white smoke while accelerating,starts fine and idels good....what could be the problem?


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Sep 12, 2009 | 1989 Mitsubishi Mighty Max

1 Answer

Truck struggles to start, then runs fine until I come to a stoplight. Take foot off of accelerator & shift into neutral. Truck will not idle; cuts off & will immediately restart but not idle.


It sounds like your balance belt might be broken. I have a 1991 Mighty Max that experienced the same problem. My water pump started leaking and as I was replacing it, I discovered the balance belt was also broken after removing many parts on the front of the engine in getting to the water pump. It's a small rubber belt that turns opposite of the crankshaft to keep the engine from shaking at idle. My engine is still torn down, as I don't know how to replace the balance belt. Sure could use some advice on this repair.

Aug 10, 2009 | 1991 Mitsubishi Mighty Max

1 Answer

Carburettor adustment on 1995 mitsubishi starwagon


If you have a carburator still then you need to know more.
screwdriver method on feel/rpm gauge
Proper exhaust measurement.
Run her up to 650 rpm idle start adjusting mixture screw until max rpm obtained. back out a bit too be lean. Ajust Idle screw again for 650.
Turn on appliances as lighting and airco. If engine starts/tends to stall, vibrate increase the idle a bit more.

You are not ready with the engine if not doing ignition settings and valve clearances as well, etc.

Mar 17, 2009 | 1995 Mitsubishi Mighty Max

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