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please help me, I don't find how to install a new CAS in a 90 4g63t
(how to find the corect position) how to do initial setup
 

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The way i've been told is to get the motor to tdc on cylinder #1 set the cas to tdc and install. The CAS should be at mid range for adjustment, then just set your timing.
 

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Just install it on and get a timing light and start it. If it doesnt start, take it out and turn the teeth on the CAS 180* and put it back on. Just use the timing light to help you set it to TDC.
 

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On the firewall there is a wire you must ground before you adjust your timing. And while adjusting your timing, keep the rpm's below 1200 because anything after that takes the car out of timing mode.
 

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There is a mark (round dent) and flat mark on the CAS stub where it fits up to the intake cam. These need to be aligned. Then the engine has to be at TDC with the crank mark in the correct spot("T" on the timing cover aligned with the white mark on the crank pulley), both cams with thier dowel pins pointing upwards, and the cams having thier horizontal marks aligned correctly. Then when you install the CAS into the intake cam, with the 2 marks on the CAS correctly aligned, everything will be mechanically in synch.

Then ground the one pin near the battery and start the car. Then set the timing by gently moving the CAS forwards or backwards till you see 5deg on the timing marks near the crank pulley. When its set correctly, tighten both 12mm bolts to secure the CAS.

If you warm the car up before you do this, you can also set your base idle speed at the same time. Also a good idea to set your throttle stop switch too, as if its out, you will need to reset your base idle when you get the throttle stop set correctly.
 
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