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per Chilton's, the firing order of the 78 toro, 403cu in. is 1-8-4-3-6-5-7-2. The same as the 455cu
Firing order should be cast into intake in front of carb if you have factory cast iron intake but above answer is right
also it has a counter clockwise rotation unlike the corporate engine firing order
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∙ 14y ago
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What is timing of olds 403?
I didn't see a specific year year you're interested in, however a 1978 Olds 403 is listed as 18 degrees initial timing (detach and plug vacuum advance hose while setting initial advance).
Will headers for a 403 Olds fit on a 455 Olds?
No, the blocks are different.
557265 4b what size is this engine?
It's an Olds 403.
Could a 350 Olds exhsaust manifold fit on an Olds 403 motor?
yes i think so
Will 403 olds engine mounts fit a 350 olds?
The blocks were physically the same size so I don't see why not.
What are the intake manifold torque specs for a 403 ci Oldsmobile engine?
Intake manifold torque specifications for the Olds 403 is listed as 30 ft-lbs.
What is the spark plug gap for a 1977 Oldsmobile 403 cubic inch engine?
The spark plug gap for a 1977 Olds 403 is listed as .060 inches.
Where is the oil pressure gauge sending unit on a Olds 403 1978 trans am?
The unit is at the front of the engine near the oil filler neck. Its a little cylinder with an electrical connection at one end and a pipe into the engine at the other.
Where is 1 cylinder at on olds 403?
the first plug on the drivers side up near the radiator.
What is the firing order of a 1978 Pontiac Trans Am 403?
Since the 403 is an Olds engine, the firing oder is the same as any GM 8 cylinder (1-8-4-3-6-5-7-2), HOWEVER the distributor rotates COUNTERCLOCKWISE. Make sure you identify this before proceeding with installation of wires to cap. Make sure distibutor is lined up with #1 cylinder and it is TOP DEAD CENTER, firing and make sure the timing mark on the crank is a "0". I use a long screwdriver to "eyeball" the #1 tower on the cap to the #1 cylinder (should "point" to it when layed down). Try to get this as acurate as possible. If it is not lined up perfectly, removed and reinstall distibutor until it is damn near bang on. Car should fire up with very little adjustment of the distributor. After, take car out for a good run and advance distributor just until it starts to "ping", then back off a hair!!! You're now on your way to peek engine tuning.
What is the spark plug wiring for a Pontiac 403?
The 403 is an Oldsmobile engine, the firing order is the same however, 1-8-4-3-6-5-7-2
Where is the oil pressure sending unit on a 1979 trans am with olds 403?
Near top of water pump
