Timing Chain Learned Value
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Timing Chain Learned Value
Along with some other questions about the timing chain, I asked this in the Engine section but nobody answered so I am hoping that somebody in the tuning section will answer.
Can the timing chain learned value be reset by an ecu reset with the Cobb AccessPort or in any other way without having to go to the dealership? I posted this in the Cobb forums and they said no, but in the video from Mitsubishi they claim that any reset of the "learned values" will reset the timing chain value. I also saw a howto post for changing they timing chain and they claimed that just pulling a specific fuse will reset this value, but some people claimed that it didn't work for them.
If resetting the learned values (by flashing with the AccessPort or by any other means) does reset the timing chain value, does that mean that the warning indicator can no longer be relied upon if it has ever been reset?
Can the timing chain learned value be reset by an ecu reset with the Cobb AccessPort or in any other way without having to go to the dealership? I posted this in the Cobb forums and they said no, but in the video from Mitsubishi they claim that any reset of the "learned values" will reset the timing chain value. I also saw a howto post for changing they timing chain and they claimed that just pulling a specific fuse will reset this value, but some people claimed that it didn't work for them.
If resetting the learned values (by flashing with the AccessPort or by any other means) does reset the timing chain value, does that mean that the warning indicator can no longer be relied upon if it has ever been reset?
#2
I have wondered this exact thing on many occasions, but I have no idea. It seems to me it would be stupid for Mitsu to architect the ECU in such a way that flashing it resets this extremely critical value. Cars often have ECU patches / flashes done by the dealership. As such, I sincerely hope flashing the ECU doesn't do this.
#3
If your vehicle is logging a timing chain stretch code, the dealership should be doing the correct checks. i.e. there is a procedure in the workshop manual which outlines a physical stretch limit for the chain in mm. This requires them to set the motor to TDC and check for movement in the chain, and if its within spec, they will carry out the learned value reset, which only resets the value (no flashing etc)
If its not within spec, they will replace the chain and go from there
This is what should be happening, if not, time to find a new dealer
If its not within spec, they will replace the chain and go from there
This is what should be happening, if not, time to find a new dealer
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If your vehicle is logging a timing chain stretch code, the dealership should be doing the correct checks. i.e. there is a procedure in the workshop manual which outlines a physical stretch limit for the chain in mm. This requires them to set the motor to TDC and check for movement in the chain, and if its within spec, they will carry out the learned value reset, which only resets the value (no flashing etc)
If its not within spec, they will replace the chain and go from there
This is what should be happening, if not, time to find a new dealer
If its not within spec, they will replace the chain and go from there
This is what should be happening, if not, time to find a new dealer
#5
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I have wondered this exact thing on many occasions, but I have no idea. It seems to me it would be stupid for Mitsu to architect the ECU in such a way that flashing it resets this extremely critical value. Cars often have ECU patches / flashes done by the dealership. As such, I sincerely hope flashing the ECU doesn't do this.
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