CE Lancer running issue

C

Carlos56

New Member
Hey everyone, this is the first time I have posted on this forum. I have a good understanding of motor mechanics and auto electrics. I have done most of my mechanical repairs over the last 40 years. I am desperate and stumped about this issue with my daughters 2000 MITSUBISHI LANCER COUPE CE with a 1.8 LT auto. The vehicle runs normally - no issues, when it warms up the engine check light comes on and the engine just stops - like Someone has turned off the ignition. If you try restarting there appears to be a little timing issue (bit of a pop) but it starts and you can rev it up and everything sounds good - then it just dies. The engine will only run for about 3-4 seconds and then dies (no spluttering, nothing rough it just stops). You cannot keep it going even revving the engine it will die at higher revs. Thought it may be a fuel pump issue but it makes little sense, if there was limited fuel in the rail, revving the engine should reduce the running time, but whether it idles or revs it’s about the same time and it dies. If you leave it or start it right away it’s behaves in the same way - so this is why I don’t think it is the fuel pump. I have used an OBD2 scan tool but this vehicle refuses to give up any codes, will not connect, so that is of no help. When the engine cools down everything works fine. A retired mechanic neighbour suggested the Crank Angle Sensor. So I have replaced that with no changes, the car ran fine for about five minutes and died with same running problems. He also suggested the ECU relay so I swapped that, no change. Reset the ECU - no change. I have already replaced the coil packs and plugs for another unrelated issue that was resolved successfully. Dose anyone have any suggestions? I would love to resolve this problem so my daughter can have her independent back.
 
1. Unplug the MAF sensor and see if it still happens. If not replace MAF sensor
2. Check TPS voltage with ignition to the 'ON' position (engine itself off). Throttle closed should read .99v throttle open should read 4.99v with no flatspots or sudden jumps while gradually opening the throttle
3. Check state of O2 sensor (located near exhaust manifold). If any color other than light brown/tan replace O2 sensor
4. Disconnect battery for 5 minutes then reconnect and turn key to 'ON' position. have someone standing in front of the car. you should hear a clicking sound for a couple of seconds. If you dont hear this get the ISC/IACV checked
5. Check for a blocked catalytic convertor (will need muffler shop for this)
6. Check condition ignition leads
If its none of them then it could be an issue with the auto box or ecu itself which will require a mechanic with a MUT 2 scanner
 
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