Rob P Posted on Feb 25, 2015

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2003 Montero Sport 3.0L, 135K miles. Cold start, idle ok. Once warm, low idle and sounds like it has a miss.

Bought OBD II tester. Primary code I believe is P0300 and other codes are P0403, P0113, P0102, P0107. I'm thinking the last 4 codes are a result of the primary code. Never had plugs and wires replaced on it. Problem is my time is limited and looking for a great diagnosis!Its the kids car and every day she is without it is another day I have to be a cabbie

1 Answer

Randy Ohler

Mitsubishi Master 14,585 Answers
Posted on Feb 25, 2015

Randy Ohler

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Your going to need a wiring diagram. You have a MAF,MAP, IAT and EGR sensor problem. My guess would be a signal wire or ground is bad. These four sensors are right at the throttle body. The mass air flow sensor and the manifold absolute pressure sensor are one in the same. The intake air sensor is next to it. All are located in the air induction plenum. Between the throttle body and the air filter. The Engine gas recirculation valve/sensor is right behind the throttle body. So check the harness from the air filter/ MAF to the engine harness plug. Look for conduit that is rotted away and/or melted.

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2003 Montero Sport 3.0L, 135K miles. Cold start, idle ok. Once warm, low idle and sounds like it has a miss.

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Randy Ohler

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2003 Montero Sport 3.0L, 135K miles. Cold start, idle ok. Once warm, low idle and sounds like it has a miss.

1 Answer

Randy Ohler

Add Your Answer

Attachments: Added items

Related Questions:

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My 2002 Mitsubishi Montero will shake real bad at about 40mph/2000rpm's, once your over that speed it will stop. It does not do this when you first start driving and the engine is cold but once it warms up...

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Lifter sound in the morning

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