I have a 2000 v8, looking under the hood . what is the spark plug order front to back , and left side and right.1 throuh 8

Firing order for V6 is 1-4-2-5-3-6 If your standing in front of the car looking towards the windshield 1-2-3 are on the PASSENGER side and 4-5-6 are on the DRIVERS side front to back.

Firing order for V8 is 1-3-7-2-6-5-4-8...Again looking from the front 1-2-3-4 is on the PASSENGER side and 5-6-7-8 is on the DRIVERS side front to back.

AS you look at the engine under the hood your will see that the 8 cylinders are arranged in two banks of 4. One bank of 4 cylinders is just slightly more towards the front of the car/engine than the the other. The cylinder that is closest to the front of the engine is called 1 cylinder, as you look at the engine: this is the cylinder on the front right. Fords and Lincolns number the cylinders 1, 2, 3, and 4, front to to back, on the right and then 5, 6, 7, and 8, front to back, on the left bank. Number 8 cylinder is the back left as you face the engine. I keep making reference to the orientation of the viewer when calling the engine left and right. Everything above is correct when looking at the engine under the hood. But strictly speaking the engine is labelled from the point of view of the direction of the vehicle so the right cylinder bank that you look at is actually called the 'left' cylinder bank and vice versa. Do not worry about this gratuitous confusion the cylinder 8 is still the one closest to the windscreen /firewall

Plug wire order is: 153624 on six cyl 4.0 and 18436572 for v8.
#1 cylinder on 6cyl is the front one and on V8 is front on driver side.
1357 left side, 2468 right side. #1 on cap is easily found by turning the crankshaft till the timing mark aligns with 0. but that can be 180 degrees off unless rotor points away from the block (6) or towards the front of the engine (8)..

the firing order on your 5.7 is 1-8-4-3-6-5-7-2,clockwise.your no.1 is first one right side if standing in front of your truck.if you know for sure where any one goes on the distributer then follow the pattern.right side goes 1-3-5-7,left side goes 2-4-6-8 front to back.if you need more help E-MAIL me at [email protected] this helps!

What size engine? Check the gap on the plugs as well. "pregapped" is not always right

350 Chevy engine in what? 1990 Corvette? Who built it, did you?

Sounds as though you have plug wires wrong.
Firing order is 1-8-4-3-6-5-7-2

Distributor Ignition System:
Distributor rotates Clockwise. (Rotor)
Find Number 1 tower on distributor cap, go Clockwise with Firing Order.

Distributorless Ignition System:
VIEWING the engine from the Front of the car.

Spark plug wire connections along the back, starting from Left side going to Right side;
2-3-7-4

Spark plug wire connection towards the Front of the engine;
6-1-5-8

(To guess I would say you have 5 and 7 wires switched)

Left side cylinder order is 1-3-5-7, going from front to back.
Drivers side is Left side.
Right side cylinder order is 2-4-6-8, going from front to back.

Not sure what you mean by 8-6-4 but this will help you. Pick the correct one for your application:



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 (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

Standing at front of truck, looking under the hood.

The closest cylinder to you on your right is #1. #2 is close left. #3 is middle right, #4 middle left. #5 is back right and #6 is back left.

Firing order is 1-6-5-4-3-2. This is the sequence for placing the wires on distributor cap in a clockwise direction. #1 spot on cap is the 3rd post after the wiring harness (clockwise). This post should be closest to cylinder #5.

Since you didn't state whether it is a V6 or V8, I'll give you both.

V6 -4.3Liter
Firing Order is 1-6-5-4-3-2
Distributor rotor turns Clockwise
Number 1 spark plug tower on distributor cap, faces the front of the engine.

->Drivers side, spark plug order in engine, starting from the Front going back:
1-3-5
->Passenger side, spark plug order in engine,
starting from the Front going back:
2-4-6

If it's Electronic, the distributor cap has a Left side, (Drivers side), and a Right side, (Passenger side)
Starting from the Front, going back on the Left side,
3-1-5
Starting from the Front going back on the Right side,
2-4-6

V8-5.0, 5.7, and 7.4Liter
Firing Order is 1-8-4-3-6-5-7-2
Distributor rotor turns Clockwise
Number 1 spark plug tower on distributor cap,
faces Front, towards the Drivers side.

Electronic distributor cap has two sides. Drivers, (Left), side and Passenger, (Right), side.
Starting from Front going back on Drivers side,
1-7-3-5
Starting from Front going back on Passenger side,
8-2-4-6

Spark plug order in engine, starting from Front going back, Drivers side:
1-3-5-7
Spark plug order in engine, starting from Front going back, Passenger side:
2-4-6-8

There are six VIN numbers of engines for the 1991 Buick Lesabre, with a 3.8 Liter engine.

1.Vin B
2.Vin 3
3.Vin C
4.Vin 1
5.Vin L
6.Vin K

All have the Firing Order of 1-6-5-4-3-2

For Vin B and 3:
Hood open, looking at the engine from the front of the car. The coil pack is behind the engine, close to the firewall. (Under the windshield)
The crankshaft pulley is down on the left side.

Spark plug numbering, for the spark plugs close to the radiator side.
From Left; (Front of engine), going Right-> 1-3-5
Spark plug numbering, for spark plugs on the backside of the engine.
From Left going Right-> 2-4-6

The distributorless coil pack sits on the backside of the engine, close to the firewall.
Numbering of where to put the spark plug wires;
There are three spark plug towers close to the engine. From Left to Right -> 3-5-7
There are three spark plug towers far from the engine. From Left to Right-> 6-4-2

For Vin C, 1, L and K:

Hood open, facing the car.
The Front of the engine faces to the Right. The crankshaft pulley is down, and to the Right.

Spark plugs close to the radiator;
From Left to Right-> 6-4-2
Spark plugs close to firewall, (Below windshield)
From Left to Right-> 5-3-1

The distributorless coil pack sits on the right side, in front of the engine. (The Front of the engine is on the right side. The crankshaft pulley is on the Right side)

Starting at the ->Back and coming Forward. (To the Front of the car)
On the Left side of the Distributorless Coil Pack, it is -> 4-2-6
On the Right side it is -> 1-5-3