Question about 1994 Mitsubishi Mighty Max

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1994 mitsubishi mighty max acceleration problem

When first starting my truck, it will idle for about one second then bog down and die. Second time starting it will actually continue to idle fine until pressing the accelerator, in which case it will bog down and die again. If you just slightly pull up on the throttle it will rev up and sound great, however, if you increase the throttle too fast it will bog down. After about 20 minutes or so of doing this, the truck will warm up and run perfectly and it will not do it again until it sits, turned off, for at least 2 hours. Any ideas?

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Apr 08, 2009

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SOURCE: 91 mighty max hard starting then runs great, always hard starting

could be coolant temp sensor

Posted on Oct 30, 2009

  • 4793 Answers

SOURCE: Mitsubishi Triton V6 lacks power on acceleration

full power is only achieved when the engine is fully warm(operating temp).so if you accelerate more than, say, a third of the gas pedal,the car will feel sluggish.
this is more apparent when first starting the car in the morning in winter.almost like the car is going to stall.
most wear in the engine is leaving it to idle when cold you should always drive the car straight away from cold.then when hot turn on the a/c if required....

Posted on Jul 05, 2010

dttech
  • 4803 Answers

SOURCE: I have a 1992 Mitsubishi Mighty Max v6 3.0. It

Yes, the computer does retain fault codes. They can be retrived either with a scan tool or by using an analog volt meter. (Good luck finding one of those if you don't already own one.)
Volt meter method:
Find the diagnostic connector located next to the fuse lock under the left side of the dash
Connect the positive lead of the volt meter to pin 1 on the diagnostic connector.
Connect the negative lead to pin 12. Turn the ignition switch on and disclosure of the ECM memory will begin.
The ECM will output 12 volt pulses. There are long pulses and short pulses. The long pulses count as tens and the short pulses count as ones. Example: 3 long pulses and 2 short pulses means code 32.
If there are 2 or more fault codes in memory, they will be output one at a time in order of the code number from lowest to highest.

dttech_1.gif Code Description
_____________________________________________________
11 Oxygen Sensor or Circuit
12 Airflow Sensor or Circuit
13 Intake air Temperature Sensor or Circuit
14 Throttle Position Sensor or Circuit
15 Motor Position Sensor or Circuit
21 Coolant Temperature Sensor or Circuit
22 Crank Angle Sensor or Circuit
23 Top Dead Center Sensor or Circuit
24 Vehicle Speed Sensor or Circuit
25 Barometric Pressure Sensor or Circuit
41 Injector or Circuit
42 Fuel Pump Control Circuit
43 EGR Temperature Sensor or Circuit

Posted on Jan 22, 2011

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