[Jeffb]

Howdy- Folks
I'm green on this site, but I think I'm gonna like it! Some really neat info and knowledgable folks here!!!! I've a pretty dumb question and am almost ashamed to ask it, but- What is the firing order on the coil pacs on a 95 SLS? My wires are not marked, and I want to change them and the plugs ( If I can figure out how to get to them!) O/W the Northster is a great engine, IMHO.
Thanks
Jeff

 

[AKPsiMC03]

i dont know the order... but to get to them, just take the plastic cover off the top of the motor.

 

[Jeffb]

Well, sorry to sound so dumb, but I know how to get to the wires- what I don't know is how to get to the back plugs, and neither do I know the firing sequence. i.e- from left to right, looking from the front, in what order do the wires go to the plugs?

 

[AKPsiMC03]

to get to the back, there are 4 bolts holding the coil pack thing on, unbolt them, and disconnect the lead ires to the packs. then you can look rught back and see them, its actuallt quite easy. this car was the fastest plug change i ever did.

 

[Katshot]

Hopefully, this is what you're looking for.

 

[AKPsiMC03]

Hopefully, this is what you're looking for.

that pic doesnt look right... i could have sworn that #1 was the passenger side rear.

 

[Katshot]

It IS. The coils are shown on the rear bank in the diagram.

 

[Jeffb]

Katshot- That's it!!! Thanks a lot

 

[Jeffb]

You the MAN!!! I'll pull the coil pac thingie and hopefully get the plugs- Thanks

 

[Katshot]

We aim to please Jeff.

 

[Jeffb]

ACKsiMco3
You are right- easiest plug change I've ever done--!!!
Thanks a lot for the info- I'd never figured out how to get to the plugs!
Jeff

 

[Jeffb]

Katshot- the diagram was great- 20 minutes and the plug change and wires done!!! Thanks!

 

[Katshot]

You're welcome.

 

[Chuck C]

isn't there a firing sequence list ethced (raised letters actually) somewhere on the motor? I could have sworn I saw this while cleaning under the hood one day.

 

[Katshot]

I know many engines have the firing order cast into the intake manifold but I'm not sure if the Northstar has it anywhere. Just for your info though, the firing order is as follows:
1-2-7-3-4-5-6-8
It is unique to the GM engine line which generally uses the standard 1-8-4-3-6-5-7-2

 

[AKPsiMC03]

ACKsiMco3
You are right- easiest plug change I've ever done--!!!
Thanks a lot for the info- I'd never figured out how to get to the plugs!
Jeff

you're welcome

 

[El Dobro]

I ran out to the garage to check for the firing order on the Allante. It's cast onto the end of the rear cam cover of the Northstar engine, on the passenger side of the vehicle.

 

[elwesso]

I know many engines have the firing order cast into the intake manifold but I'm not sure if the Northstar has it anywhere. Just for your info though, the firing order is as follows:
1-2-7-3-4-5-6-8
It is unique to the GM engine line which generally uses the standard 1-8-4-3-6-5-7-2

Good ol 18436572....... Oh man, that brings back memories from redoing the plugs on a boat.......!

I wish it only took me 20 mins to do the plugs....... Took me 5-6hours........