Mechanics

SUBARU WRX SENSOR PROBLEM

1998 Subaru WRX

Electrical problem
1998 Subaru WRX 4 cyl All Wheel Drive Manual 15900 miles

On " Distributorless ignition system" does the waste spark ignition method use a camshaft position sensor?
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Nick Maple
March 16, 2010.




Hi Yes cam and crank sensors used. What is problem?
Let me know
Thanks for donate

Docfixit
Mar 16, 2010.
Well, I'm basically having trouble understanding " Distributorless Ignition system" and how the camshaft position sensor works to sync with the crankshaft position sensor.

Thanks in advance,
Nick Maple

Tiny
Nick Maple
Mar 16, 2010.
Sensors and computer take place of mechanical distributor. Cam tells computer which cylinders in firing order are at TDC. The crank tells which piston is at TDC
when computer sees in sync it will fire appropiate plug.
This is simple explination a lot of other inputs are monitored to fire plug.

Docfixit
Mar 17, 2010.
" Cam tells computer which cylinders in firing order are at TDC".

How does the cam sensor know this, by counting the tooth on the cam reluctor wheel or is there some kind of marking.
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Tiny
Nick Maple
Mar 17, 2010.
Yes sensors are electromagnetic so a reluctor on cam and crank when it passes by sensor creates a current sent to computer and this tells position of pistons and cam. PROM fires plugs in correct order in relation to RPM, Throttle position, ect.

Docfixit
Mar 18, 2010.

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