CAS vs. CPS

DiamondStarM · Nov 30, 2005

Ok lets all clarify some things here. Everyone tosses these two term around interchangeably. On cars other then 95-96 this is the CPS or Camshaft Position Sensor

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The CAS is the Crankshaft Angle Sensor (sorry no picture) and these are two separate parts and opposite sides of the engine.

Am I understanding this correctly?

Old Mitsu Tech · Nov 30, 2005

A rose by any other name. Is still a rose.

Just as some call the computer a cpu or central processing unit, or a pcm power train control module, or ecm electronic control module, or just computer.

You 'll get the hang of it. I use CAS when I describe.

Good Luck

hereitcomes · Nov 30, 2005

yes. they are the same. and often times quite expensive to fix

DiamondStarM · Nov 30, 2005

So why do they sell a Camshaft Position Sensor for $80 and a Crankshaft Angle Sensor for $40?

Spyderman7 · Nov 30, 2005

CAS usually refers to 90 to 94 cam angle sensors.Most people prefer the 90 model because it has its own pigtail (Wires)connected.91 to 94 you'll need the connector and enough wire from the harness.The 94 model is supposed to have better pickup and is identified by its plastic side cover.The CPS came on 95 and later.However because it was often broken(they break easy)in 97 the design was changed and it was moved from behind the intake cam gear to the other end of the intake cam.Still does the samething though and still requires a crank sensor located at the front of the crank.This is the one that breaks when you have crankwalk.It depends who you talk to,some people call them different things.But they are 3 different things thats why they don't cost the same.

DiamondStarM · Nov 30, 2005

Spyderman7 said:
CAS usually refers to 90 to 94 cam angle sensors.Most people prefer the 90 model because it has its own pigtail (Wires)connected.91 to 94 you'll need the connector and enough wire from the harness.The 94 model is supposed to have better pickup and is identified by its plastic side cover.The CPS came on 95 and later.However because it was often broken(they break easy)in 97 the design was changed and it was moved from behind the intake cam gear to the other end of the intake cam.Still does the samething though and still requires a crank sensor located at the front of the crank.This is the one that breaks when you have crankwalk.It depends who you talk to,some people call them different things.But they are 3 different things thats why they don't cost the same.

So for 97-99 is it called the CAS again or is it the CPS still? Also does this mean that if that sensor went it it may not be directly related to CW?

1G-3G Eclipses · May 6, 2007

Well i just bought a 1G GSX and the guy says that it needs the Crankshaft positioning sensor re-installed (CPS).
so does he mean the CAS???
also would this be something that is hard to install?

PS: yes i know, super old thread revival, but that happens when n00bs use search LOL

.

steve · May 6, 2007

1G-3G Eclipses said:
Well i just bought a 1G GSX and the guy says that it needs the Crankshaft positioning sensor re-installed (CPS).
so does he mean the CAS???
also would this be something that is hard to install?

On a 1G it would mean the CAS. Assuming you have all the parts it shouldn't take more than 15 mins to reinstall it. Turn the engine over my hand until it's at TDC cylinder 1. Line up the timing markes on the CAS and install it into the back side of the intake cam. Adjust the CAS midway and finger tighten the bolts. Once you have the car running let it come up to temp and perform a final setting to 5* BTDC with the timing adjust terminal grounded.

Steve

alkadaypx182 · May 6, 2007

DiamondStarM said:
Ok lets all clarify some things here. Everyone tosses these two term around interchangeably. On cars other then 95-96 this is the CPS or Camshaft Position Sensor

You must be logged in to view this image or video.

The CAS is the Crankshaft Angle Sensor (sorry no picture) and these are two separate parts and opposite sides of the engine.

Am I understanding this correctly?

Correct me if I'm wrong but I think there is actually two different sensors. A Cam angle sensor(CAS) and a Crankshaft position sensor on 2g's. I believe this because I know I had to hardwire my Crank position sensor into my cam angle sensor during my 6 bolt swap.

Cam angle and Cam position sensor are both used interchangeably though. The same as crank angle and crank position sensor.

Crank position sensors are pretty hard to replace since they are underneath the timing belt cover.

1G-3G Eclipses · May 6, 2007

alkadaypx182 said:
Correct me if I'm wrong but I think there is actually two different sensors. A Cam angle sensor(CAS) and a Crankshaft position sensor on 2g's. I believe this because I know I had to hardwire my Crank position sensor into my cam angle sensor during my 6 bolt swap.

Cam angle and Cam position sensor are both used interchangeably though. The same as crank angle and crank position sensor.

Crank position sensors are pretty hard to replace since they are underneath the timing belt cover.

they are both present in a 2G but not a 1G correct?

steve · May 6, 2007

1G-3G Eclipses said:
they are both present in a 2G but not a 1G correct?

Except when you have a 6 bolt swapped into a 2G.

Steve

nfljohnl · May 30, 2010

I have a 6 bolt swapped into a 2g do you know what year cam angle sensor i have? Also whoever wired this before me used the o2 sensor harness and wired that to the cam angle sensor and then plugged it into the 02 sensor and the regular cam sensor plug just sits there now. I don't understand my car LOL

The first pic is the new connector that comes from the cam sensor and the second pic is what it now plugs into and the third pic is the old cam sensor plug which now just sits there. Someone please help me.

steve · May 30, 2010

nfljohnl said:
I have a 6 bolt swapped into a 2g do you know what year cam angle sensor i have?

Since it doesn't have the connector on the side of the CAS it has to be the 90 version.

nfljohnl · May 30, 2010

Do you know if the wiring I explained above is correct?

steve · May 30, 2010

I don't. You'll have to look at how it's actually connected pin for pin.

dsmer1 · Sep 7, 2011

ok so im having trouble with the same thing. on the intake camshaft there is a plug that is on the opisite side of the timing belt gear. i have been told it is the CAS or CPS. is this the same thing?

luv2rallye · Jun 15, 2012

I know this is an old thread but for others coming here, CAS vs CPS clarification: http://www.dsmtuners.com/threads/oh-god-code-0340.272874/#post-151302110.

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