Back-up fuel and spark

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Sep 30, 2004 | 11:19 PM

crazy427

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Joined: Sep 2004

Posts: 13

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From: edison,NJ

Car: To

Engine: Many

Transmission: Projects

Back-up fuel and spark

what are the perimeters for the backup fuel and spark funtion in the computer?

can anyone help?

Oct 1, 2004 | 12:30 AM

Stekman

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Joined: Jul 2003

Posts: 4,803

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From: Grand Rapids, MI

Car: Z28

Engine: Sb2.2 406

Transmission: Jerico 4 speed

Axle/Gears: Ford 9" 3.60

What backup fuel and spark? Is there some function I am unaware of, say a second set of spark plugs or a second distributor?

As for the fuel, the only backup there would be the oil pressure switch. If the relay fails, and there's 4 psi of oil pressure, the switch will power the pump.

Oct 1, 2004 | 01:05 AM

dimented24x7

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From: Moorestown, NJ

Car: 88 Camaro SC

Engine: SFI'd 350

Transmission: TKO 500

Axle/Gears: 9-bolt w/ 3.23's

There is the redundant fuel device. Little chip with some resisters in it next to the prom along with some other junk in the computer that controls the fueling if the processor or prom fails. There isnt any backup spark. If the computer quits then all you have is the base time plus a little advance with increasing rpms thats added in by the module on its on.