The firing order for GM 3.1 liter is 123456. How are the cylinders laid out on the engine? Where is the #1 cyl,. #2, etc?

Use this link to get info on your engine. Specifics are under the "Specification" tab. or the firing order is 1-2-3-4-5-6. link follows: http://gmauthority.com/blog/gm/gm-engines/lfw/

Hello Harvey, My information shows firing order of 123456. #1 being passenger's front cylinder and #2 being driver's front cylinder.

Since the 4 cyl engine uses direct ignition, here is the info for the V6.
Standing in front of the car, the cylinders in front are 2-4-6 and the cylinders next to the firewall are 1-3-5.
The wires on the coil are 1-4-5-2-3-6. The actual firing order is 123456.

You can replace them in any order, but the Firing Order is 1,8,4,3,6,5,7,2

You didn't post your engine size so please use the appropriate diagram:




GM (Cadillac) 250 (4.1L) V8 .GM (Cadillac) 273 (4.5L) V8 .GM (Oldsmobile) 307 (5.0L) V8 .GM (Oldsmobile) 350 (5.7L) V8 w/EFI.Engine firing order: 1-8-4-3-6-5-7-2 .Distributor rotation: counterclockwise





GM (Buick) 252 (4.1L) V6 .Engine firing order: 1-6-5-4-3-2.Distributor rotation: clockwise





GM (Cadillac) 368, 425, 472, 500 V8.Engine firing order: 1-5-6-3-4-2-7-8.Distributor rotation: clockwise





GM (Cadillac) 429 V8.Engine firing order: 1-8-7-2-6-5-4-3.Distributor rotation: clockwise

You didn't post your engine size so please pick the applicable diagram:



1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise



1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise




4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise



4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)



5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.
I have only been a free contributor to this site for the past 4-months.

I do not know if you still need this information, but I am going ahead and answering it anyway.

I do not know if you have the 2.5L (4-Cyl), 2.8L (6-Cyl), or the 3.8L (6-Cyl); however I have included all three below.

For the 2.5L (4-Cyl)
Firing Order:
1-3-4-2
Cylinders:
(back of engine)
1-----2-----3-----4
(front of engine)
Ignition Connections:
(back)
o <-----1
o <-----4
___
o <----2
o <----3
(front)

For the 2.8L (6-Cyl):
Firing Order:
1-2-3-4-5-6
Cylinders:
(back of engine)
1--------3--------5
2--------4--------6
(front of engine)
Ignition Connections:
.........(back)
|.1..4.|.|.6..3.|.|.2..5.|
.........(front)

For the 3.8L (6-Cyl):
Firing Order:
1-6-5-4-3-2
Cylinders:
(back of engine)
2------4-------6
1------3-------5
(front of engine)
Ignition Connections:
Type I:
(back)
6..2..4
3..5..1
(front)
Type II:
(back)
|.3..6.|.|.2..5.|.|.4..1.|
(front)

Let me know if this helped, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!

Again my apologies...

1992 Pontiac Firebird
3.1 liter V-6

2000 4.0 jaguar s type cylinder firing diagram:
FRONT OF CAR
5 1
6 2
7 3
8 4

well do not no if its an 8cy or 6cy but if 6cy its 142536 if 8cy 13726548 looking at motor 1234is on passengers side 5678 on driver same gose for the six cylinder