Timing control on DOHC
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Record Breaker
Joined: Jun 2006
Posts: 1,235
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From: Ohio
Timing control on DOHC
On the DOHC motor, which sensor controls ignition timing? does it go by the cam sensor or the crank sensor? i have a spare timing controller box that you hook up to interrupt the signal and go through the box then to the ECU.( works like an air / fuel controller basically). If the cam sensor defines ignition timing ill hook it up to it so i can fine tune my ign. timing a little. It might get difficult if the crank sensor signal is what controls the sprak timing. Im honestly not sure which one does it. On my mitsu motor its the cam sensor that does it (but there is no crank sensor)& its easy to put the box in.
Thread Starter
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Record Breaker
Joined: Jun 2006
Posts: 1,235
Likes: 0
From: Ohio
RE: Timing control on DOHC
i dont think anyone knows, lol
Ill just have to take the screws out of the cam sensor and move it and see if the timing changes with a light or if it just runs like ****
Ill just have to take the screws out of the cam sensor and move it and see if the timing changes with a light or if it just runs like ****
Legend
Joined: Apr 2006
Posts: 9,112
Likes: 1
From: Spring, TX
RE: Timing control on DOHC
CRANKSHAFT POSITION SENSOR
The PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft
position sensor input. The second crankshaft counter-weight has machined into it two sets of four timing reference notches including a 60° degree signature notch. From the crankshaft position sensor input the PCM determines engine speed and crank-shaft angle (position).
CAMSHAFT POSITION SENSOR
The PCM determines fuel injection synchronization and cylinder identification from inputs provided by
the camshaft position sensor and crankshaft position sensor. From the two inputs, the PCM determines crankshaft position. The camshaft position sensor attaches to the rear of the cylinder head. A target magnet attaches to the rear of the camshaft and indexes to the correct position.
So to answer your question....NEITHER. The PCM regulates ignition timing.
The PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft
position sensor input. The second crankshaft counter-weight has machined into it two sets of four timing reference notches including a 60° degree signature notch. From the crankshaft position sensor input the PCM determines engine speed and crank-shaft angle (position).
CAMSHAFT POSITION SENSOR
The PCM determines fuel injection synchronization and cylinder identification from inputs provided by
the camshaft position sensor and crankshaft position sensor. From the two inputs, the PCM determines crankshaft position. The camshaft position sensor attaches to the rear of the cylinder head. A target magnet attaches to the rear of the camshaft and indexes to the correct position.
So to answer your question....NEITHER. The PCM regulates ignition timing.