How Do I Know If My Cas Is In Right Position?

[wrxxy]

How do I know If my Cam Angle Sensor is In right position?

Is there a way of checking it?

Just wondering as my CAS has been moved a few times and I am still not 100% sure that its in the right position , If theres anyone outhere that could help would be much appreciated....

I have searched about this topic and most of the replies are unclear.

Thx In advance

[blind_elk]

With a timing light. Moving the CAS affects the ignition timing. Timing at idle should be 15 BTDC.

[WazR32GTSt]

as above

the cas controls that base timing. it should be at 15deg BTDC which is usually about in the middle of its range of movement..

[SECURITY]

unless its auto, then its 20BTDC.

always check when the engine is at operating temp.

[wrxxy]

Guys if anyone could help I need an in depth step by step on what to do as I'm no mechanic!

This would be much appreciated Its a R34 neo engine with triptronic.....

thx in advance

[Godzilla32]

You need a timing light for starters you can buy them from autobarn type shops. Then you need to connect the 2xpower leads to your battery and the third lead goes onto number one HT lead that connects the your spark plug. Number one cylinder is at the front of the engine IE: closest to the front of the car. Make sure you hook this up the right way, there should be an arrow on the connector for the light indicating which way round it should be hooked on. Once its all connected up get a appropriate spanner to loosen the bolts on the CAS just enough so it can e rotated but not so much as it will turn by itself. Next start the engine and point the timing light down onto the crank pulley. There will be a series of marks on the timing cover behind the pulley with numbers on it IE:15BTDC,10BTDC,5BTDC,TDC, etc. There is a corresponding mark on the pulley itself that when you shine the flashing timing light on it, it will point at one of the marks on the timing cover. With the car idling twist the CAS until the mark lines up with 15BTDC. Then tighten up the CAS and recheck it.

Good luck hope i helped

Deren

Edited October 1, 2006 by Godzilla32

[wrxxy]

I have done this already , to find that the timing mark was was fluctuating and was unclear how to stop this I'm pretty sure that theres a way of making the mark stay at one point this is my main concern!

[blind_elk]

Sounds like the half-moon key has broken on the camshaft side, and there is significant wear in the teeth that are keeping it all aligned.

[SECURITY]

could just be an idling problem. make sure you're at operating temp when doing this and check all idle related components are working properly. go through and search the DIY section on how to fix these yourself.

[46n2]

consult plug it in, bring it up to temp and check timing. nice and easy

[frozenwaffles]

ok from what i am aware of, full clock wise is default position... just fixed my rough idling r33 and now she sits at 650rpm just perfect!

[neofenrir34]

ok from what i am aware of, full clock wise is default position... just fixed my rough idling r33 and now she sits at 650rpm just perfect!

i could be wrong but it is my understanding that most skyline's should idle much higher then that. more like up around 800-850

[frozenwaffles]

no 650 rpm is factory default...check the service manual...

[neofenrir34]

as above

the cas controls that base timing. it should be at 15deg BTDC which is usually about in the middle of its range of movement..

i think u just must have typed the wrong thing. The CAS does not affect base timing. it affects ignition timing.

[Munkyb0y]

theres a sticker under your bonnet that tells you what idle should be. i think it's 700 +/- 50 from memory

mine idles at 700.

edit: it's 650 +/- 50

Edited December 15, 2007 by Munkyb0y

[Munkyb0y]

lol check the date of the original post

[Duncan]

CAS should not be fully advanced normally. Unless it starts at about middle of it's range it will have reduced adjustment.

[frozenwaffles]

is there anywhere that says that officially?