Question about Mitsubishi Mighty Max

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1992 mitsubishi mighty max 4 cyk.I've replaced rotor wires,fuel filter and ocasionally the motor will run erratic and back fire thru exhaust.Then the next time you start it then it will run fine

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Sound like your getting water in the gas, or out of time. check the timming.

Posted on Sep 28, 2008

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Posted on Jan 02, 2017

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1 Answer

What would cause lack of pulling power?


check ignition timing, exhaust system for blockages, fuel pressure ,injector tip condition, blocked air filter. Run the fault codes to check for faulty sensors.

Aug 12, 2014 | 1991 Mitsubishi Mighty Max

2 Answers

1992 Mighty Max,wont start.


Check fuel pressure my have bad pump.

Jan 18, 2018 | 1992 Mitsubishi Mighty Max

1 Answer

My sons 88 Mighty max runs terrible at about 35 mph and up. Seems to run betterhe air temp is cooler, like 60's and lower. We replaced plugs/wires, cap/rotor, fuel pump, air/fuel filters, some que


Air is more dense at lower temperatures so the cylinders fill better and there is some evidence increased humidity also helps engines to run better.

Replacing stuff in the vague hope it will provide a cure can be expensive and very frustrating and is no substitute for proper checks and replacing only what proves to be faulty.

New plugs won't improve matters if the spark is really weak and a new fuel pump is really money down the drain if the pressure regulator is faulty or the injectors aren't spraying properly or the carb has some blocked jets or if the oxygen sensor is sending the wrong information...

It is best practice to always start with the basics - engine condition, timing, compressions, cylinder leakage and so forth. Your description indicates the engine is short of fuel or fuel that it can use but could equally be caused by a restricted exhaust. I once had a car just like that and it was a worn exhaust cam lobe that was causing the trouble.

Jul 03, 2017 | 1988 Mitsubishi Mighty Max

1 Answer

I have a 1990 mitsubishi might max it wont run smooth unless you keep your foot on the gas and keep the rpms up a little bit and it wont drive cause it stalls everytime you try to move it. ive replaced the...


You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

Aug 17, 2011 | 1993 Mitsubishi Mighty Max

1 Answer

I did a Tune up on a 1992 Mitsubishi mighty max I changed the oil & Oil filter, the spark plugs and spark plug wires, the air filter and i changed the distributor cap and rotar. after all that i am...


it is fuel injected and the injectors are in a manifold at the inlet manifold
most misfires are injector related ( dirty tips , low fuel pressure or injector wiring harness) get a workshop manual from an auto parts shop

May 25, 2017 | 1992 Mitsubishi Mighty Max

2 Answers

What's the firing order for a 1990 Mitsubishi Mighty Max (4.banger)?


1990 Mitsubishi Truck Mighty Max 2WD 2.4L FI 4cyl
The Firing Order mitsutrk01:
Firing order 1-3-4-2 --------- front | | of | 1 2 3 4 | Distributor rotates clockwise vehicle | | ---------

1990 Mitsubishi Truck Mighty Max 4WD 3.0L FI 6cyl
The Firing Order mitsutrk04:
Firing order 1-2-3-4-5-6 ------- front | 1 3 5 | of | | distributor rotates counter vehicle | 2 4 6 | clockwise -------


Hope help with this (remember rated this help).

Mar 12, 2010 | 1989 Mitsubishi Mighty Max

1 Answer

My 1992 Mighty Max, will not start, its getting plenty of fire, but I don't tkink its getting fuel, what could be causing this?


If not getting fuel then the normal areas to check is the fuel filter, fuel pump but first the obvious is to make sure you have fuel in the tank. If this engine has a carburetor, remove the air filter houseing and pour a small amount of gas into it. Try starting it. If it starts and then dies it is a fuel delivery problem. If it wont start even temporily then I'd check things like wires, plugs, timing, etc (stuff to do with delivering a spark).

Mar 08, 2010 | 1992 Mitsubishi Mighty Max

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