Question about Mitsubishi Mighty Max

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1991 mighty max check engine light comes on and off

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  • laura dawn marx Mar 26, 2011

    1991 mighty max check engine light comes on and off

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Welcome to Fixya

This means the engine management system has detected a fault within the system and stored a code that will help you find the problem that the cars management system has found.

To receive codes you will need a diagnostic testing tool that your local Garage may have, If they do not have the correct tool they can retrieve the codes manually .

Once you have the codes this will help me what has to be tested repaired or replaced.

Thank you for using Fixya!

Posted on Mar 26, 2011

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  • Mitsubishi Master
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The check engine light comes ON when the cars computer (the ECU) notices any kind of electrical problem in car. In some cases the check engine light comes on then turns off. In that case the exact error is not getting confirmed so this happens. But once the problem gets confirmed the engine light will remain permanently ON till the problem gets solved. In this case I suggest you to get your car scanned at autozone service center. It's absolutely free. In case in car scanning, if any error code is retrieved then you can check which part is faulty as per the error code. If no error code is retrieved, then you will have to get the battery to starter, battery to alternator connections checked.You will have to get the throttle body and IAc valve cleaned.The IAC valve is located on throttle body.Get this cleaned and it should help.But most probably you will receive a error code.Due to which the check engine light is blinking.---------this should help.Thanks.Helpmech.

Posted on Mar 26, 2011

  • raj somaiya Mar 26, 2011

    Get the car scanned by local car mechanic.It will point toward the faulty part to be replaced.Keep updated.Thanks.Helpmech.

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I have a 1991 Mitsubuishi mighty max truck . The truck runs fine until I drive for about 1 mile and then the check engine light comes on and the truck starts shaking , but does not lose power.


Hi, I own an 86 Mighty Max truck myself. Is there anyway you can get the code number for the engine light coming on. It could be many things that cause this problem. Fuel filter, EGR, Clogged Catalyst, Sparkplug Misfire, Cracked Distributor Cap, the list goes on. It needs to be determined if the problem is fuel or electrical related to help diagnose the problem.

Oct 13, 2013 | 1991 Mitsubishi Mighty Max

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No low beam on 1991 mighty max . New tree switch new lamps ??


you may have a blown fuse check the fuse box to see if any are blown,you may find that HIGH & LOW beam lights are on separate fuses.....hope this helps.......cheers.

Jul 16, 2011 | 1991 Mitsubishi Mighty Max

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How to reset maintenance required light for 1991 mitsubishi mighty max


there is a small switch behind one of the switch blank off plates to the right of the steering column. It is a very small switch about 6" deep into the dash, hard to find easy to reset.

Nov 12, 2010 | 1990 Mitsubishi Mighty Max

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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

What does the maintenance required light mean on a 1991 mitsubishi mighty max? and how do you turn it off? What is the regular maintenance for this truck?


Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Oct 03, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

1991 MITSUBISHI MIGHTY MAX 2.4 CHECK ENGINE LIGHT COMES ON AND OFF AND WHEN IT DOES I CAN FEEL THE ENGINE CHANGE. I JUST REPLACED THE ALTENATOR AND THE MASS AIR FLOW SENSOR.


try the oxygen sensor. the heated one, when the heater burns out it causes problems. Its the one with 3 wires usually in the rear

Mar 23, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

Put in distributor for 1991 mitsubishi mighty max


Please confirm which engine your truck has; 3.0 V6?

Thanks,
Tom

Feb 28, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

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,
Tom

Oct 30, 2009 | 1991 Mitsubishi Mighty Max

1 Answer

Torque specs for mighty max


Per my Chilton's manual tehe bolts should be (cold engine) 65 to 72 FT. Pnds., the cam shaft bearing bolts should be 8x25 = 15 - 19 Ft pnds and the 8x65 should be 14 - 15 Ft Pnds.

The sequence is as follows for the (10 ) head bolts:

7 - 5 - 2 - 4 - 10

9 - 3 - 1 - 6 - 8

I hope this may help,
Tom

Oct 12, 2009 | 1991 Mitsubishi Mighty Max

2 Answers

Need the valve gap for 1991 mighty max


Does not have adjustable valves . It has hydrolic valve lasher's . they are spring loaded ( i believe ) . I just replaced them in mine . valve giude seal's where worn out causing it to smoke realy bad ( looked like a mosqito truck ) and the valves where ticking , due to the hydrolic valve lash adjuster's being worn out . They are about $ 8 - 10 buck's each at advance .

Mar 22, 2009 | 1991 Mitsubishi Mighty Max

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