I changed my spark plug wires and screwed up the firing orber it is a 350 chevy 8 cyl 1978 big block can u help please the engin is in my jet boat I am leaving for the river thrus morning

firing order on chevy v8 is 1-8-4-3-6-5-7-2 number one cyl is ft left of engine left side being 1-3-5-7 from ft to rear 2-4-6-8 right side ft to rear

You could have 3 different engines in that rig.
The firing order is 1-8-4-3-6-5-7-2 for most Dodge 8 cyl engines.
And the odd cylinders are on the driver side.
The small block engines ( 318 ) have the distributor in the back, and the big block engines ( 360 440 ) are in the front.
The rotor on the big blocks turn counterclockwise. The dist cap is usaully stamped with cyl 1 as a starting point.

As far as I know, all chevy 350s are the same.

Here is the firing order diagram for that engine.

If it follows the normal big block chevy order, it is: 1-8-4-3-6-5-7-2



Hope helps (remember rated this).

Ok Gary I sent you two figures of a 2.2L and 2.4L engine I hope to serve you. Thanks

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'm not sure if you have the 2000 Dodge 1500 with the 3.9L (6-Cyl), 5.2L (8-Cyl), and 5.9L (8-Cyl) Engine; however I have included.

For the 3.9L (6-Cyl):
Firing Order:
1-6-5-4-3-2
Cylinders:
(back of engine)
6----------5
4----------3
2----------1
(front of engine)
Distributor:
(+).6...5
1...........4
...2....3..(+)-screw

For the 5.2L AND 5.9L:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
(back of engine)
8...........7
6...........5
4...........3
2...........1
(front of engine)
Distributor:
.......(back)
.........3
....4........6..(+)
8...............5
(+)1........7
.........2

Again my apologies...

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

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.

18436572 Firing order for Chev V-8. No 1 is 1st cyl. on drivers side. Rate if this helps Moe