ignition coils, difference between N/A and S/C? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-07-2006, 09:56 PM   #1
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Default ignition coils, difference between N/A and */C?

long story shor ti been drivign with mismatched coils and lviing with a slight misfire for awhile, a friend got me some free coils from a series 2 N/A, obviously i got an */C, so i put em in, my engine is much smoother, no misfire, but now it feels real sluggish, thoughts, ideas? i was thinking either theres a difference between */c and n/a or maybe these coils are just old
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Old 10-07-2006, 10:03 PM   #2
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Default Re: ignition coils, difference between N/A and */C?

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Originally Posted by NERV
i was thinking either theres a difference between */c and n/a or maybe these coils are just old
There is no difference between n/a & sc.
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Old 10-07-2006, 10:10 PM   #3
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SII 67 coils are a slight upgrade from L36 coils.
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Old 10-07-2006, 10:41 PM   #4
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l36 would be the series 1 sc? i thought the series 2 n/a was the l27, so as long as theyre series 2 coils they shud be the same?
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Old 10-07-2006, 11:14 PM   #5
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L67 is SI and SII supercharged. L27 is SI NA, L36 is SII NA.

All SI (L27 and L67) and SII NA use the same coil. SII L67 got better coils. You want SII L67 coils.
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Old 10-08-2006, 02:31 AM   #6
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97 and newer L67 coils are 'hotter' than L27, L36, and 91-96 L67 coils.
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Old 10-08-2006, 03:08 AM   #7
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so what were saying Nerv is that the coils that you got free are just like stock replacements for you
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Old 10-08-2006, 12:46 PM   #8
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No, you got NA coils, didn't you?
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Old 10-08-2006, 04:34 PM   #9
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yea i got n/a coils, they should hold me over for now until i have the $ for new ones
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Old 10-10-2006, 03:07 AM   #10
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Quote:
Originally Posted by willwren
97 and newer L67 coils are 'hotter' than L27, L36, and 91-96 L67 coils.
O rly??? Never heard this before. Just curious where you got this info from. Interesting...

FWIW, I have my stock L36 coils on my car. It does make sense that they might not have as much spark as the L67 coils because I can't run as large of a gap as others with the same setup. However, I have had no issues with power, and swapping them back and fourth should make no difference as far as being "sluggish". You may possibly get a miss if you go from the stronger coil to the weaker one, but nothing a little spark plug gap can't fix.
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