Spencer0991:
Please I have a serious problem. Have a Mitsubishi Pajero 2001 with one coil (2 cylinders) not firing and also starting problems. A scan suggested the power unit (TR2 if I remember correctly) but it's been changed (tried 2 samples) to no effect. My electrician insists it's the brain box but 3 different ones have been tried(including one from Dubai) and none worked fine. They started well suggesting the original brain box was indeed not working well but none fired properly. One even transferred the non working coil to another coil nearest to the battery while the originally troubled one started working (the coil not working with my brain box is the one furthest from the battery). Now he's suggesting rewiring the car to work with my brainbox AND the purchased one (at 35k), one to control firing and the other starting at a 25k workmanship charge since all else has failed . Is this even possible? Should it be done or continue looking for brainbox?

GAZZUZZ:


6cylinder engine, 6 coils, 2 coils not working, engine ecu replaced still not working. Problem is centered around the engine harness.

Spencer0991:

Thanks for the reply. But can a faulty engine harness explain the fact that the problem developed gradually with the coil coming on and off intermittently until now that it's mostly off? And that another Brainbox was able to make the faulty one work fine but another one stop working?

GAZZUZZ:
in this case, check harness for continuity. Using a wiring diagram, this Shuld be easy. If it is a 4 pin socket to the coils, 2 pins are for power (1 ignition the other ground) the other 2 are straight from engine ecu. The power pins are connected in parallel to all 6 coils and can be checked easily when engine is running, or when off.
The summary of this, is you should get a qualified tech who knows what he is doing to look at your vehicle.
Cc: diportivo

GAZZUZZ:
in this case, check harness for continuity. Using a wiring diagram, this Shuld be easy. If it is a 4 pin socket to the coils, 2 pins are for power (1 ignition the other ground) the other 2 are straight from engine ecu. The power pins are connected in parallel to all 6 coils and can be checked easily when engine is running, or when off.


The summary of this, is you should get a qualified tech who knows what he is doing to look at your vehicle.

Cc: diportivo

mayor2013:
Any aftet market remote or immobiliser installed on this car?

Spencer0991:
Please can I speak with you privately?

GAZZUZZ:



08033910382

sultaan:
WHat is the primary and secondary resistance on the coils
ALso double check that they did not switch the coil connectors. If a mechanic made a mistake and connect the wires for coil #2 to #4.

If #2 is suppose to fire and #4 fires the engine is working fine you just have you wires crossed look at engine pics online and compare to yours or find a similar truck to compare connections

When did the problem start was it after a mechanic worked on it?

Spencer0991:

The problem started gradually. Coil no. 3 would intermittently go off and come on after a while (the car has 3 coils for 6 plugs: 1 plugs per coil). Then it started staying off longer until now it's mostly off. What the electrician wants to do is to rewire the car to use a brainbox that almost worked perfectly with the car (it started well but didn't fire very well). It's for a Montero (very similar model; exterior virtually identical). He wants to get it with complete wiring and sockets and wire it to the coils

Spencer0991:
Well the mechanic did the work using the brainbox of a closely related pajero model and it worked. The only incompatibility was the compressor which he rewired. The car runs beautifully again. Some differences in the movement as its an Auto ECU (my car has a manual transmission).