Mechanics

ENGINE IGNITION TIMING/MODERN CARS

2010 Infiniti I35 • 6 cylinder 2WD Automatic • 9,000 miles

Is it true that modern engine timing is accomplished by constant spark plug firing & ignition timing caused by fuel ingjection controled by computer?
Avatar
Gancho
December 7, 2010.




Basically, yes. The computer controls fuel injection and ignition timing among many other things. Most cars have a direct ignition system that doesn't use a distributor and firs 2 cylinders simultaneously.

Wrenchtech
Dec 7, 2010.
1 cylinder is on compression(fires) the other is wasted spark on exhaust cycle.(4 cyl engine)

Tiny
Fixitmr
Dec 7, 2010.
Actually the number of cyl is supplied by the number of coils. Each coil having 2 outputs. 4 cyl has 2 coils. 8 cyl 4 coils, 6 cyl 3.

Tiny
Fixitmr
Dec 7, 2010.
But no constant spark. Only at TDC for each pared cylinders.

Tiny
Fixitmr
Dec 7, 2010.

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