Question about 1989 Mitsubishi Mighty Max

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

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Your problem may be a faulty head or valve seat allowing antifreeze to seep into the exhaust while accelerating or it could be the result of unburned gas try a can of gas treatment or octane booster or a tune up hope this helps.

Posted on Sep 13, 2009

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White smoke during acceleration is usually the result of a "blown" head gasket. Antifreeze getting into the cylinder is the cause of the white smoke. Check the coolant level, if it's low you have the problem.

Posted on Sep 13, 2009

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My 1988 Mighty Max is smoking from the exhaust. ..


Does the smoke go away soon after starting? If so then your valve stem seals are worn out. If it smokes all the time then the piston rings are worn. Oil fouled spark plugs will cause starting problems.

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Loosing antifreeze 1990mitsubishi 2.4 no visible leaks,exhaust has white smoke no oil loss


Sounds like a head gasket is giving up. Do a compression check, and research the parts you need to do a head rebuild.

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Sounds like you have a blown head gasket and coolant is getting into one of the cylinders.

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My '95 mighty max with 110,000 miles just had new cap and rotor, spark plugs and wires, and PCV valve. New battery timing belt "A" and "B". Timed to 7.5 deg with the timing...


If it is doing this only when you rev the engine after it has been idling a while, it is probably smoke from burning oil. A new set of valve stem seals will probably work wonders in reducing the smoke. Stopping the oil consumption will not only help it to pass a smog test but will also help to keep from damaging your engine and your catalytic converters. 110,000 miles is just barely broke-in for a Mitsubishi engine. However, the seals are probably cracked and broken due to the AGE of the vehicle.

Jul 24, 2011 | 1995 Mitsubishi Mighty Max

2 Answers

I currently own a 1989 Mighty Max I got from an auction. It has the 2.6 engine in it, with a brand new oil change and spark plug replacement. Unfortunately, it seems to be acting as a smoke machine. The...


OIl coming up the dipstick indicates a build up of pressure in the crankcase... change the PCV valve
White smoke in the exhaust indicates water and the smell is most likely antifreeze.. Blown head gasket

Jan 08, 2011 | 1989 Mitsubishi Mighty Max

2 Answers

I have a 1991 mitsibishi mighty max and it blows thick white smoke when I start it, why does it do that. It runs good though.


you have water/coolant entering the combustion chamber. either the head is cracked or you have blown a head gasket.

Oct 09, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

89 nissan z24 pickup idles fine bute smokes very badly under acceleration bluish white color does note knock or tap


valve seals are gone over time with high mileage..check oil and make sure antifreeze is not mixing then it would be head gasket..

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1 Answer

Anti freeze dripping from exhaust


this is caused by a blown cylinder head gasket.

Apr 18, 2009 | 1993 Mitsubishi Mighty Max

1 Answer

91 Mitsubishi Mighty Max stalls during acceleration


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.

Dec 14, 2008 | 1990 Mitsubishi Mighty Max

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