1G CAS Adjustment All The Way Up

[spadepro22]

My car fires up the 1st time every time, runs very lean at start up, but other than that is fine. Could my CAS be bad since its adjusted all the way up?

 

[Auto RS T]

If it was bad, the car wouldn't run. Set ignition timing to 5* BTDC with a timing light and carry on.

If you can't get it near center that way, your mechanical timing is off on the intake cam and you will have to reset the timing belt.

 

[obsidian]

Concur with the above statement. I'm guessing your mechanical timing on the timing belt is off probably by a tooth.

 

[spadepro22]

So if there is no cel, and the car is running but the cas is adjusted all the way up means its still good? Then why would it be adjusted all the way up? Just want more opions before I buy another one. Will it cause the rpms to drop and run lean too if its going bad? If its bad, would the car still run?

 

[YanDsm]

Did you read the previous post? Like "Auto RS T" and "obsidian" said, maybe your intake cam is off by one teeth on the timing belt and it could be the reason why your CAS is all the way up.

sorry for the mistake : one tooth

 

[spadepro22]

Did you read the previous post? Like "Auto RS T" and "obsidian" said, maybe your intake cam is off by one teeth on the timing belt and it could be the reason why your CAS is all the way up.

sorry for the mistake : one tooth

Yes I read. Other opions wont hurt, because maybe its not off a tooth.

 

[LiquidX]

Quit being lazy, check timing to see if it's set at 5*BTDC using a timing light with the timing pin grounded out. If it's bouncing around or not set properly, adjust it and I would verify mechanical timing as well.

 

[spadepro22]

Quit being lazy, check timing to see if it's set at 5*BTDC using a timing light with the timing pin grounded out. If it's bouncing around or not set properly, adjust it and I would verify mechanical timing as well.

Understand check timing. Still could it be bad without throwing a cell? I would like to know before I spend money on a timing light and timing be correct.

 

[Mr PopUps]

Autozone will rent you one.

 

[steve]

I would like to know before I spend money on a timing light and timing be correct.

Buying tools is never a waste of money unlike buying parts to throw at problems that you haven't diagnosed.

The CAS has nothing to do with running lean. How do you know that it's lean anyway? That's not clear.

What is clear is that your CAS is at the end of it's adjustment range and that is suspect. Either the base timing is incorrect or the CAM timing is off causing you to have to compensate with the CAS adjustment.

Since your asking for opinions, mine echos the others. Go get a timing light and verify the base timing before buying any replacement parts.

 

[spadepro22]

Ill attempt to check timing. I've never done it so I've been reading up on here. From what I could understand is to hook up the ground and timing light, set it to 5*. What next, just aim at at the cam gears? What will the timing light show?

 

[Kng Nothg]

aim it at the crank pulley as long as it has the plastic cover still on the motor

 

[spadepro22]

aim it at the crank pulley as long as it has the plastic cover still on the motor

What Im i suppose to look for? And the cams seems easier, so I can adjust the CAS

 

[steve]

The cam marks only line up at TDC (0* BTDC) but the CAS needs to be set to 5* BTDC (the first mark before the T on the front cover). How are you going to do that looking at the CAMs?

 

[bryanwheat]

IF you get a light that is adjustable DO NOT set the light to 5 degrees, set the light to 0. The dial on the light is for something different. There is a mark on the timing cover that lines up with a mark on the crank pulley when the engine is at 5 degrees before top dead center. When the number one plug fires, the sensor in the timing light lead fires the light. The pulley will appear to be standing still and the mark will be in a stationary spot. You will turn the cam angle sensor until the mark on the pulley lines up with the 5 btdc line on the timing cover. Don't forget to ground the timing terminal also.

 

[SS Laser]

There is a thread or tech post on here how to use a adjustable timing light using the cam gears to set timing.

I found it. http://www.dsmtuners.com/forums/art...-timing-without-using-lower-timing-cover.html

 

[DSM1G90]

Having the cover off, just watch out for the belt getting caught in the gun's wires.

I've done this trick with SOHC motors, but rather be traditional with the crank pulley timing since that's directly attached.

It's just much easier to point the light at the "5" mark on the cover and see the notch on the pulley hit the *5BTDC with the pin grounded and the CAS loose to rotate.

 

[LiquidX]

Hook up negative and power to battery attach pick up to the #1 plug wire. Ground timing pin, get the car to operating temperature of at least 180*.

Point light at the crank pulley, squeeze trigger and note the notch that becomes illuminated. Adjust it to 5*BTDC by the timing cover using the CAS.

 

[1983gsp]

Check mechanical timing FIRST. Then if its correct, buy a timing light and follow the procedure for adjusting the ignition timing. Checking ignition timing first is bass ackwards.

 

[mchustle]

Like stated in the link above you can use the cams to set the timing if you use an adjustable timing light, but the downside is they cost around $50 than regular timing lights. So it's much easier to just use the crank pulley and a second person to slowly turn the Cas. Even if you use the cams it's still awkward and difficult to turn the Cas and hold the timing light while looking at the cams by yourself. I also agree that you should check mechanical timing first to make sure it's right.

 

[spadepro22]

So is there anything that i need to take off to see the crank pulley mark? Mechanical timing, is that getting the idle right(read a thread somewhere on here), because that my problem

 

[bryanwheat]

So is there anything that i need to take off to see the crank pulley mark? Mechanical timing, is that getting the idle right(read a thread somewhere on here), because that my problem

Checking the mechanical timing is referring to checking the cam timing. You will not need to take anything off to see the mark. There is a raised area with numbers on it on the timing cover that you will be able to see.

 

[spadepro22]

So to check the cams, I need to point the timing light it them to see if the white lines line up?

 

[bryanwheat]

So to check the cams, I need to point the timing light it them to see if the white lines line up?

No, check to make sure that all the timing marks are lined up before using the timing light.

 

[fourgsixthree33]

Mechanical timing is checked by lining up the crank timing mark. With this lined up perfectly, the cams will also be lined up correctly as well if the mechanical timing is correct. If cam timing marks do not line up perfectly, mechanical timing is off.