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?

 

[bcjjones]

Is this a joke?

 

[architechnik]

Okay, real simple.

To check the cams, there are marks on the side of the cam gears. You should be able to rotate the engine using a breaker bar or large ratchet on the crank center bolt until those marks line up. Then use a ruler or straight edge to make sure the marks on the outside of the cam gears also line up straight across.

To use a timing light, first warm up the car then ground the timing terminal near the battery. Set the idle to 750rpm, then hook up the timing light. An inductive timing light will sense the ignition pulse through the spark plug wire and light up every time it pulses.

By grounding the timing terminal, the ecu will not try to compensate in any way. Each time the ignition pulses, the timing light will flash. You point the light at the crank sprocket across the timing cover, where there are marks. You may want to put a little white-out on the timing sprocket where there is a notch so it's easier to see.

The marks have numbers and this is the number of degrees advance timing you have. If it shows 5 degrees, you're good. If not, adjust the cam sensor position until it does.

If you need more information, try checking out the instructions on how to check timing and for installing and inspecting a timing belt in the tech articles.

 

[LiquidX]

You have 5 timing marks to align on a stock timing side motor. Crank, oil pump, balance shaft and the 2 cam marks needto be all aligned with their designated marks for mechanical timing to be good.

Check out the timing belt vfaq to see what marks are getting aligned.

 

[spadepro22]

Thanks. Guess ill go buy the most expensive timing light and return it when I'm done.....jk

 

[bryanwheat]

Thanks. Guess ill go buy the most expensive timing light and return it when I'm done.....jk

You don't need an expensive one. Go to harbor freight and get the cheapie.

 

[mchustle]

Thanks. Guess ill go buy the most expensive timing light and return it when I'm done.....jk

I had that plan at one time . Unfortunately autozone and advance will not return electronics. Like stated above you can never have too many tools , and if a friend needs a timing light you'll be there for them (for a small fee ).

 

[DSM1G90]

I still have my timing light that I bought over 30yrs ago (now dating myself here..), a cheap $26 dollar one from Sears ... Been to Hell and back a few times, but still works great.

 

[spadepro22]

Im off today, so I brought myself a timing light, hooked it up and im seeing around 10* of timing on the lower case. What next?

I also aimed at the cams gears and the white marks are close. Is there a way I can turn the crank to line up the cams perfect so I can get a better reading(because of the blinking of the timing light)

 

[mchustle]

Did you make sure to ground the timing connector?

 

[spadepro22]

Did you make sure to ground the timing connector?

Yes I did, the idle droped the first time, but I when I unhooked everthing and rechecked it the idle didnt drop.

 

[bryanwheat]

Im off today, so I brought myself a timing light, hooked it up and im seeing around 10* of timing on the lower case. What next?

I also aimed at the cams gears and the white marks are close. Is there a way I can turn the crank to line up the cams perfect so I can get a better reading(because of the blinking of the timing light)

Turn the cam angle sensor until it is at 5 degrees before top dead center.

 

[spadepro22]

Referring to the lower case numbers

There is a 1 above the T, after that, its a mark, then its the 10, then another mark. Im assuming 5* is the mark between the 1 and the 10. Is that right?

 

[bryanwheat]

Referring to the lower case numbers

There is a 1 above the T, after that, its a mark, then its the 10, then another mark. Im assuming 5* is the mark between the 1 and the 10. Is that right?

That would be correct.

 

[spadepro22]

Thanks, Im by myself at the moment Ill have to get someone to adjust it while I keep check. The motor shop that normally works on my car tuned it. Is there a reason why you think it may be set at ten? I dont want to ajust it and it throws my tune out of wack.

 

[bryanwheat]

Thanks, Im by myself at the moment Ill have to get someone to adjust it while I keep check. The motor shop that normally works on my car tuned it. Is there a reason why you think it may be set at ten? I dont want to ajust it and it throws my tune out of wack.

They probably either didn't adjust it or they didn't know what they are doing. It needs to be set at 5 regardless. It doesn't only control the spark, it also controls the timing of the injectors.

 

[mchustle]

Thanks, Im by myself at the moment Ill have to get someone to adjust it while I keep check. The motor shop that normally works on my car tuned it. Is there a reason why you think it may be set at ten? I dont want to ajust it and it throws my tune out of wack.

If it is tuned at 10* it will deff throw the tune off, but that doesn't matter because that would mean it was tuned incorrectly at the shop and you need to talk to them. The first step in tuning is always Blt and make sure timing is set at 5*.

 

[spadepro22]

If it is tuned at 10* it will deff throw the tune off, but that doesn't matter because that would mean it was tuned incorrectly at the shop and you need to talk to them. The first step in tuning is always Blt and make sure timing is set at 5*.

Yea, Im 100% sure it was tuned where its currently at. I havent adjusted anything. Should I wait until another tune, to adjust it?

 

[fourgsixthree33]

Adjust it. Like everyone else have stated, it is supposed to be at 5* BTDC.

 

[Alan11]

You don't even need a light... just take the timming cover off..its not that hard..
If mechanical timming is fine then put your cas 5* BTDC.

If you are having idle surges start with basics like a BLT..

 

[bryanwheat]

You don't even need a light... just take the timming cover off..its not that hard..
If mechanical timming is fine then put your cas 5* BTDC.

If you are having idle surges start with basics like a BLT..

How do you recommend setting the cas to 5 degrees without a timing light?

 

[Alan11]

How do you recommend setting the cas to 5 degrees without a timing light?

Sorry I mixed stuff up...

 

[spadepro22]

Adjust it. Like everyone else have stated, it is supposed to be at 5* BTDC.

Understand it suppose to be at 5*, but setting it to 5* and tuning be out of wack is still not helping any if the car starts to run bad.

If it is tuned at 10* it will deff throw the tune off, but that doesn't matter because that would mean it was tuned incorrectly at the shop and you need to talk to them. The first step in tuning is always Blt and make sure timing is set at 5*.

Think I need to wait on the tune and set it to 5* before I take it?

Thanks for all help folks

 

[bryanwheat]

Your fuel ratio's will be fine. The timing will be a little low if he pulled timing out because of the high base timing. Overall it will not throw the tune off.

 

[DSM1G90]

When I do the timing, I have one of the holddown nuts on the CAS a bit more snug than the other so I can still rotate the CAS since I have to reach across to hold the CAS while I'm eyeballing the timing mark with the gun.

This way, the one nut that is a bit more snug can hold the CAS to the reference that I want, then I can go back to it and not worry on if the CAS has rotated after letting the gun rest.

I'll then snug down the other nut and redo the timing check again. If all is then good, I'll tighten up the two nuts and do a final timing check with the light.

Oh, you also have to do this timing procedure on a hot motor. That way things are fully warmed up, no high idle during cold, etc.

5 minute task and all is done. - good luck-DSM

 

[lil corb]

Bringing up this up from the dead.

In the situation where my mechanical timing is DEAD on properly and my CAS has been installed with the correct marks together and not 180* reversed and at TDC. What would cause the CAS to have be rotated all the way clockwise and it's still only lines up at the T and not at the 5* mark with a timing gun light (while the grounding pin is activated on through DSM link)? I am also using a Fuidampr crank pulley and I have my idle set at 1000rpm due to FP2 cams

I have been trying to figure this out for months now. Could it be a bad CAS?