05 coil pack melting

Brian N

Active member
May 7, 2004
32
0
erie, pa
have an 05 hippo and it melted a coil pack on the front of the motor. one of the coil on plug types. i replaced with a used one i had changed for a misfire and it melted too. bought a new one from the parts store and left it loose, not connected to plug, to test. cuz i dont want to dig pieces of coil out of that bore again!!! turned on ignition but didnt crank and went out to feel it and was very very hot very quickly. the others were cold.

long story long... bad computer sound about right? if replacing do yo have to reprogram the whole car?

any help. thanks!
 

jymmiejamz

Well-known member
Callsign: KN4JHI
Dec 5, 2004
5,510
52
31
Los Angeles, Ca
I would not condemn the PCM based on your diagnosis so far. I would check the wires from the PCM to the coil. If you do end up needing a new PCM, it will have to be programmed. I don't think you can install a used PCM in that vehicle, but I'm not certain.
 

Brian N

Active member
May 7, 2004
32
0
erie, pa
Ok, local Bosch shop can’t get me in until week after thanksgiving. Not thankful for that... no local rover dealers... so dug in a bit more. Didn’t tear all the wire loom apart but I did get some resistance between the black and black/white stripe wire on the coil connector. Traced back to ecm and on the connector where the coils connect to the ecm I get continuity/low resistance around 1 ohm, between the black/white stripe wire and the center of the plug ”ground” wire. Does this sound indicative of an ecm failure? I checked it both connected and disconnected to ensure I was reading the ecm as fault and not the wires. When disconnected not reading continuity at coil connector. And also no connection from that center “ground“ wire to any of the other coil wires.

thoughts?
 

discostew

Well-known member
Sep 14, 2010
4,780
48
Northern Illinois
It's pretty easy to rest that shit. Key on for about 45 seconds, turn key to off / start the engine and let it idle in gear.
I've had a bunch of the drivers in the ECM bun up. You can see them when you split the case. They extended the warranty coverage on those I think.
 

jymmiejamz

Well-known member
Callsign: KN4JHI
Dec 5, 2004
5,510
52
31
Los Angeles, Ca
It's pretty easy to rest that shit. Key on for about 45 seconds, turn key to off / start the engine and let it idle in gear.
I've had a bunch of the drivers in the ECM bun up. You can see them when you split the case. They extended the warranty coverage on those I think.
Oh shit, I was thinking this was an LR2. I've seen a bunch of those fail too. When the coil fails it seems to take out the PCM.
 

Brian N

Active member
May 7, 2004
32
0
erie, pa
Thanks for replies! So swap out ecm, do the key on off idle thing and all good? No key reprogram or reflash or anything crazy?
 

discostew

Well-known member
Sep 14, 2010
4,780
48
Northern Illinois
I was just saying that after you unplug that one. I'm not sure if it's plug and play. I would think if you swapped it out then you have security shit to learn