T40sx
01-01-2012, 04:51 PM
ok so upon much research, i've found little to no real answers to this conundrum. what is the reason for one or multiple coil pack failures? (and in this case, failure means an apparent short across said system.)
background. this is a slow and arduous task. i've spent countless dollars and even countless more hours, as well as a couple fluid ounces of blood on this motor. this was a full engine rebuild i started a few years back. it only just came to fruition. upon finishing the motor, i noted a bad knock in the head. turns out a cam spocket worked itself off on the intake side. removed and replaced the sprocket as well as the cam. not reshimed yet, i'm aware it needs to be. but for the sake of time and money, i'm letting it ride.
the problem is this. after reassembling the head, i noted the car was hesitant to start (slow and weak) i replaced the battery and that helped. but that's when the new problem occurred. when the car wouldn't start afterwards, only turn over. i popped the hood and noted an unusual smell followed by an abrupt spew of white smoke from cylinder #1 coil. needless to say, i pulled them all. the coil was completely melted between the coil power and the ecu signal wires.
my question is this. because of funds i reused the old ignitor, coils and ecu as well as the harness. up until this moment i haven't had much issues with them. however after building a new harness to within .02 ohms i reassembled the new harness with 2 new coils and the back 2 original that tested the lowest ohm reading. only to find that now #2 and #3 burnt up, as well as severe over heating on all but #4. i intend to replace the coils as well as try an OEM harness but since i'll be using a friends parts i'm wary to burn it up like mine. what are the implications involved in the ignition system? i know the ecu drivers, ignitor, and coils. but what could be causing this massive system failure all of a sudden?
i'm appreciative of any input or suggestions.
Tony
background. this is a slow and arduous task. i've spent countless dollars and even countless more hours, as well as a couple fluid ounces of blood on this motor. this was a full engine rebuild i started a few years back. it only just came to fruition. upon finishing the motor, i noted a bad knock in the head. turns out a cam spocket worked itself off on the intake side. removed and replaced the sprocket as well as the cam. not reshimed yet, i'm aware it needs to be. but for the sake of time and money, i'm letting it ride.
the problem is this. after reassembling the head, i noted the car was hesitant to start (slow and weak) i replaced the battery and that helped. but that's when the new problem occurred. when the car wouldn't start afterwards, only turn over. i popped the hood and noted an unusual smell followed by an abrupt spew of white smoke from cylinder #1 coil. needless to say, i pulled them all. the coil was completely melted between the coil power and the ecu signal wires.
my question is this. because of funds i reused the old ignitor, coils and ecu as well as the harness. up until this moment i haven't had much issues with them. however after building a new harness to within .02 ohms i reassembled the new harness with 2 new coils and the back 2 original that tested the lowest ohm reading. only to find that now #2 and #3 burnt up, as well as severe over heating on all but #4. i intend to replace the coils as well as try an OEM harness but since i'll be using a friends parts i'm wary to burn it up like mine. what are the implications involved in the ignition system? i know the ecu drivers, ignitor, and coils. but what could be causing this massive system failure all of a sudden?
i'm appreciative of any input or suggestions.
Tony