Ignition Coils

[b97SSEi]

Is there is a difference between ignition coils for a 97 n/a bonneville versus a s/c bonneville?

I'm 99% sure that on of my ignition coils is pooched and I want to test it out with a junk yard coil but they don't have any supercharged bonnevilles or grand prixs in there.

[gonzo4191]

there is a difference, but idk if it woudl affect you finding the bad one?

[myfirstbonnie]

The coils should be the same.

[willwren]

There is a difference.

The 97 and newer L67 coils are a little 'hotter'. They can be identified by blue insulation around the primary sockets underneath.

They are interchangeable, but are not the same.

[Whitecrystal1]

There is a difference.

The 97 and newer L67 coils are a little 'hotter'. They can be identified by blue insulation around the primary sockets underneath.

They are interchangeable, but are not the same.

I ask this question a while back on the old forum but never got a reply. Reading the Techinfo it was showing the resistance the same on both the primary and secondary sides for both types... what make the L67 hotter? Thanks

[willwren]

Something inside.


There are alot of factors. Smaller wire has more resistance. Larger wire diameter has less. So it may simply be a difference as simple as that. I've never dissected a coil to determine the difference.

In order from cold to hot:

92-96 L67, 92-94 L27, 95-05 L36. All use the same coil.
96-03 L67. L32 unknown, but most likely.
MSD 8224.

All three types are a small step 'hotter' than the previous listed. None will make a drastic improvement. I went from the weakest to the hottest, and noticed a slightly smoother idle and POSSIBLY smoother power through the midrange. Not more power, but smoother.