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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-31-2005, 08:36 PM   #61
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Yes. 6 on Magnavox is 6 on Delco.

The numbers.. honestly, I wouldn't use them, because with the way the plug wires are routed, it is hard to tell which cylinder the wires are going to, not to mention not everyone knows the # each cylinder is.


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Old 01-31-2005, 08:58 PM   #62
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Hmmm...I think I'm missing something here. I thought all I had to do was label the plug wires with some tape as I removed them from the coils, and then hook them up back according to the numbers on the Delco. I'm not too sure what your saying I should do with the plug wires...I need to re-route them? How do I not use the white numbers?

Sorry for being so needy. I'm workin' on it.
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Old 01-31-2005, 09:42 PM   #63
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You just unplug them, then plug them into the corresponding cylinder. Like I said, #6 cylinder on Magnavox is #6 on Delco. You can keep the wires routed where you had them, however they don't fit perfect.. you need to grab some plugs from a 92+ to get the PERFECT fit.. but they work no problem [for example, mine worked fine]. So, if you purchase new plug wires, pick some up from a '93 Bonnevile.

You don't use the white numbers by ignoring them.. I know they are going to be hard to resist. Because, I am sure those white numbers are going to jump out at you and the #3 will want you to plug in #6.. and just pull on your hair and just say "Plug in #6, it won't hurt. COME ON!! CHICKEN!!! *Chicken noises*."

Don't worry about it, we were all there [for me it was just a few months ago].


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Old 01-31-2005, 10:48 PM   #64
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Err guys. Using the numbered coils is nice but you need to make sure they are in the right order since all three coils are the same (put a coil marked 1-4 in the 3-6 position and you get fire for 3-6).

From the harness connector they are 1-4, 2-5, 3-6.

Next each coil fires once per rev. This means that each plug is fired once for real and once at the end of the exhaust stroke (a trick that GM learned from the Honda 150 Dream). This works fine as long as you do not open the intake too early.

So you can put 4 on 1 and 1 on 4 without harming anything so long as 1 and 4 are on the same coil. But don't mix coils.

This is the same order (top to bottom) as the Magnavox just all of the wires are now on the same side so some may be a teensy bit too long now.



BTW I gap plugs for the Magnavox at .045" and .060" for the Delco ignition. Rapidfires are not supposed to be changed more than .010 so that is #3s for Magnavox and #14 for Delco.

I have no trouble pulling a relatively steep overpass at 1275 rpm (45 mph) in 4th-lockup cruise.

ps if you plan to keep the Magnavox as a spare if there is a problem with the Delco, you might want to keep the longer plug wires also.
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Old 01-31-2005, 11:56 PM   #65
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Thanks alot guys. I get that part now. However I've been able to come up with one more question. :o

In Autozones ICM guide, and in the original instructions at the beginning of this thread, there were ground straps mentioned. Do they just attach to the 3 screws before the bolts are put on, under the ICM/alternator bracket?

I'm just wondering where these 3 guys come from and where they should be attached.

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Old 02-01-2005, 07:46 AM   #66
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Those ground wires are attatched to the [middle] stud that connects to the block and holds the ICM BRACKET on. Don't mess with that, I have fucked with those grounds a lot, and have had problems with starting in the past. Just about killed me why the car wouldn't start. Damn grounds. Now, to remove the ICM, there are three nuts underneath the bracket, that you cannot see and are hard to get. Just get a box head on them, and you'll be fine. I forgot the size.. but it'* small.. 7mm maybe? I don't know if you are going to want to remove the bracket or not.. but if you don't have to, don't. It may be a little harder to work, but all the things you have to remove to get it off, aren't easy. I had to pull my alternator, PS pump bracket, some other thing, just tons of crap. Not a fun job, IMO.

Nice sig pic ya got there, btw


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Old 02-01-2005, 02:49 PM   #67
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Well, I got the ICM and coils off. Holy flying crap that bolt was a pain in the *** to get off! I had to loosen the big ground cable bolt under the bracket, but not much. I didn't have to take any of that stuff off. Anyway, I am going to get a new wire set and plugs now. I 'll get them for a 93+ so everything fits perfect.

I'll take pictures in a bit.
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Old 02-01-2005, 04:05 PM   #68
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Told ya it was a PITA to get off . Once you get the bracket off a few times, it will only take you 5-10 minutes after that [I have it down to 5 minutes]. Good luck from here!


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Old 02-01-2005, 07:21 PM   #69
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Whoa. I just finished 10 minutes ago. Get this - today its -2 C, it'* super damp and melty outside, and the car hasn't been run in 24+ hours AND the block was NOT plugged in. Before the mod, this thing wouldn't have even come close to starting under these conditions. Maybe a few sputters. Once I was finished, I nervously went to start her. She fired up in less then a second. I didn't even hear it turning over it was that quick. I took her out for a spin and it ran great!

Today I installed:

- 6 AC Delco Plugs (normal) at 0.060"
- 6 New plug wires
- Delco ICM and Coils

I will tell everyone now, that if their car is having a tough time firing up in damp/cool conditions w/o the block heater, try this mod and replace those parts. It worked like a dream for me!

Here are some pictures:

After the mod:


Crud I took out, and packaging for new stuff ( the old plugs were NGK 55'* or something like that)


And for my last question. I noticed after I had started her up there was some steam/smoke coming from the front bank of cylinders where the plugs were. It did have a smell, but not a very distict one. I blew on it a couple times and the steam and smell went away and never returned. I'll post a video when I can find some room on my FTP.

Anyway, I want to thank everyone here. Withou you guys my ignorance would have led to paying a mechanic, or my engine catching on fire . Not only was I able to complete this task successfully, but I learned alot of new things. This is a great community here!

thanks a bunch!
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Old 02-01-2005, 07:37 PM   #70
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Awesome! Told ya it would fix you right up! Now, that steam.. I know what you are talking about. The first time I removed my plugs [not replaced] and reinstalled them, they did that too. After that, never again. Wasn't really experienced at first, so I didn't understand what the hell it was, so I ignored it.. I don't think it is bad.


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