1998 Subaru WRX

Tiny
NICK MAPLE
  • 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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Tuesday, March 16th, 2010 AT 3:59 PM

5 Replies

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

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Tuesday, March 16th, 2010 AT 4:05 PM
Tiny
NICK MAPLE
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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

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Tuesday, March 16th, 2010 AT 4:42 PM
Tiny
DOCFIXIT
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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.

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Wednesday, March 17th, 2010 AT 12:25 PM
Tiny
NICK MAPLE
  • MEMBER

"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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Wednesday, March 17th, 2010 AT 6:10 PM
Tiny
DOCFIXIT
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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.

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Thursday, March 18th, 2010 AT 12:14 PM

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