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Discussion Starter · #1 ·
I have a problem with this engine. Don't know much about it but the only firing order I can get it to run on is { 2468753 } can anyone explain this?
in 45 years of being a automotive mechanic, never seen this. The engine cast # says 87-95 350 car & truck passenger stick 1- piece seal.
 

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I have a problem with this engine. Don't know much about it but the only firing order I can get it to run on is { 2468753 } can anyone explain this?
in 45 years of being a automotive mechanic, never seen this. The engine cast # says 87-95 350 car & truck passenger stick 1- piece seal.
With a 2468753 firing order, it's either one of those super rare V-7's or you've been rattling around in Uncle Hershel's private stock. :thumbup:
 

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I had a mistake in the firing order I posted the correct is 12468753
Sorry for the wrong numbers
So, after it fires number 1 on the driver's side, the motor is firing 2-4-6-8, all on the passenger bank and then 7-5-3, all on the driver's side bank. Doc, I think you're pulling our leg.
 

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The firing order post on SBC was not correct! The order should be
12468753
What gen SBC are you referring to with that firing order?? :confused:

GM has used 18436572 for ever, SBC and BBC. LS motors, as I recall, are 18726543.

I believe a diesel SBC is 12784563.

A 4/7 swap cam would change the firing order to 18736542.
 

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Cylinders are numbered 1-3-5-7 on the drivers side, and 2-4-6-8 on the passenger side....you've got that right??

Rotor turns clockwise, sparkplug wires proceed clockwise around the distributor cap.

You're not just reading misplaced pre-printed numbered sparkplug wires are you??
 

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diesel doc:

You had 2 threads on this discussion of firing order. I merged those 2 threads together.

Less confusing to the members
 

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8 balloons, 8 spark plugs, some 3/8 hose and a hammer will tell you your firing order.
When the cylinder compresses the balloon inflates.:cool:
 

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What gen SBC are you referring to with that firing order?? :confused:

GM has used 18436572 for ever, SBC and BBC. LS motors, as I recall, are 18726543.

I believe a diesel SBC is 12784563.

A 4/7 swap cam would change the firing order to 18736542.
I never really noticed that the LS1 had the same firing order as my 429 Cadillac. 18726543. I guess they knew a thing or two back in the day.
 

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Discussion Starter · #13 ·
The SBC firing order

I did more checking: I checked the crankshaft TDC by piston travel, when the piston was at TDC the marker on the damper was at 0 degrees on the tab on timing cover

Next I checked TDC on the cam shaft by watching #6 intake rocker when it just start to brake. The marker on damper was 2 to 3 inches BTDC or I guess it at about 50 degrees.

I don't understand at all Can some one explain? sprocket not on correct???
 

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that is basically the same cap that is on my 98 pickup with a vortec. all of the drivers side wires go to the drivers side of cap and the same on passenger side but the firing order is still 18436572 if you look at cap you can see how its made to work like that.
 

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