CAS adjustments...

[s14daver]

Ok i have searched and searched over the past 2 days or so not only on nico but the web and just cant find what im looking for. Maybe i suck at searching for stuff who knows. Anyways I, like a dumb dumb, messed with the CAS on my sr thinkng of it as more like a dis cap then a sensitive CAS lol. With that said, i cant get the damn thing where it needs to be now. I use a jumper wire on the first plug and a timing light and with the CAS all the way advanced(clockwise) it still wont reach the 2nd from the right mark on the crank pulley. Basically my timing is retarded and i run out of adjustment when turning the CAS to get it where it needs to be. Im assuming the cas is installed correctly seeing as it was in time before so what gives?? In addition to some input on this, what is the correct procedure of setting this, i know you need to unplug the tps after warming it up for timing mode, so do you plug it back in after you move it or turn the car off first? Im all kinds of aggrivated right now with this any help would be wonderful. Thanks in advance.

[SpeedRacer1]

There are 360 little holes cut into the metal foil in the CAS that a laser shines through. If the car runs, just no very good, then try pulling the CAS out all the way and moving one tooth in the direction it needs to go and try to run it again. You plug in the TPS after you get the timing you want. If you dont think the timing light is working right (there are specific timing lights for direct ignition that are different from disrtibutor ignition) you can always just try to do it based on how the car sounds and runs. This is one of the imperfect ways of getting the timing close to stock.

[s14daver]

^yeah i was thinkin about just trying to move it one tooth...is it like a dis where i can pull off the plastic cover and grab onto the shaft to spin/hold it as i slide it back in? Im guessing so or this would be a pita. Thanks for the advice man.

ALSO

I never checked the timing when i first swapped it so i guess it could have been off since the beginning BUT if its positioned correctly with all the timing marks etc is there some other way it could have happened? Say, if you move it with the car turned off does it not change anything thus making that where it needs to be. Hopefully some of you understand what im asking its kinda hard to explain.

Keep it coming people i cant stand my car not being right lol

[9240sx]

Try unhooking your battery for a min or two and hook it back up..Reset the ECU..You might have somehow made the ecu pull some timing and thats why you cant get the timing to 15...Or maybe your idle is to high to set base timing..It needs to be 750-850rpm's with the TPS unpluged..Or atlest under 1000rpm.

[s14daver]

hhmmm its def 1k and higher with the tps unplugged...how do i change that?

Also with the tps plugged in, what happens when you try to adjust the cas...does it just not save it or what? I gotta figure this out its driving me nuts.

[s14daver]

Bump?

Any help guys, please?? Got an import day at our local track in 2 weeks and id love to get her running properly

[SpeedRacer1]

You can adjust the timing with the TPS connected, it will react generally the same as disconnected from my experiences.

DO NOT remove the cap and try to turn the metal piece, you will only damage it and also achieve nothing. To move it over a tooth you need to take off the 12mm bolts (while the car is off) pull out the CAS, rotate to your desire and install it again.

Warning, if you do not believe the CAS has ever been removed then do not remove it. Timing will not go bad if the CAS has never been removed, it only goes bad after people mess with the CAS too much. If it has never been removed then the problem lies elsewhere in your setup.

[Sil80315]

Ok you just can't pull the cas out and time you want. So don't listen to this guy

If you want to truely do this right

you first have to turn your motor to TDC (Top Dead Center) the best way to get this right is to remove your valve cover so you can see where the cams are lined up.

Just for an eyeball, The intake cam drift pin will be at 10'oclock and the exhaust drift pin will be at 12'oclock and the crank mark should be on the second mark comming from the right.

Now pull out your cas..and you will see 2 dots on the shaft next to the little gear. I believe if you clean it off..the dots are Red, and one is Yellow, If you can see these then you have to line up the first dot if you were spinning it clockwise..once this is done..slowly put the CAS back in..when it snaps into where it has to be it should move to the second dot automaticly. Bolt everything up and then time it with your gun at 15 degrees.

If you have any further questions im on AIM at sil80315

[SpeedRacer1]

^^This guy gave you the steps to try to get very close to the proper timing. But he is incorrect about only removing the CAS at TDC. You can remove it at any angle and rotate it a tooth. Its best done with the valve cover off so you can confirm it only moved one tooth.

He is going by what the FSM says for the most part, but if your car is actually running at all then chances are the timing is fairly close to what it is supposed to at.

[leroiboy]

sorry for threadjack; hey speed racer, can you please email me regarding the timing because i installed the CAS 15 degrees btdc and i have a million issues and am wondering if i did this wrong. my email is:

leroiboy(at)yahoo(dot)com.

you may also check out my thread at:

zer...02508

thanks

[DrifterProdigy85]

Do it right. Pull the valve cover off. Set the motor to TDC with the Cam Sprockets showing the Cam Marks up top. Pull the CAS out. Realign the Marks on the CAS and slide in back in. If you dont understand what im saying then find yourself a S14 SR20 FSM before messing anything else up.

[leroiboy]

well mine is s13 redtop-does this still apply. i understand what you are saying-so just to make sure; install CAS at top dead center, car should be started here and then adjusted to 15*BTDC, correct?

[SpeedRacer1]

You MUST ensure that the crank is at TDC AND the intake cam key is at 10 o'clock while the exhaust cam key is at 12 o'clock with a silver link down the center of each mating mark.

You must remember that their are actually 4 top dead centers, one for each cylinder. And that if you are at TDC for the wrong cylinder then the engine will be injecting and firing during the wrong stage of combustion.

Now if the engine is actually running just not very well then loosen the bolts and rotate the CAS slowly while the car is running. You must rotate the CAS VERY VERY slowly. Plus or minus a mm of rotation and the timing will be off by a degree or two, more than 4 degrees or so in either direction and the car will begin to run noticeably worse.

[s14daver]

yeah i was looking to see if it was anything more common or simple than pulling the valve cover off and redoing it, yet i think thats what im going to do. I know how this all works and just also know i dont htonk the cas has ever been taken out so how in the hell can it be so far off. Also when i adjust the cas using the timing light then turn the car off and back on sometimes it does nothing lol. Its pissing me off so i think ill just pop the valve cover off, put it at TDC, and set the ***** back in like shes supposed to...thanks guys.