1G CAS base timing question

[EclipticalGS]

Well, I posted this before with good answers, but it seems I still have a question about the timing with the 1G Cas.

Heres what I did to time it, just want to make sure im not messing around with too much timing advance because I don't have a logger ATM. I crunched it in my car door before the motor was dropped in..

Well, I have a 97, so there is no ECU grounding plug, correct?

I let the car idle and got to operating temp, then I just pointed my timing light at the crank pulley, and turned the CAS till it showed 5* Btdc..

Im just wondering if i needed to look at my ECU advace at the same time..

I thought that ECU advance had to be matched to Timing light advance..

Well, at normal idle WITHOUT the Ecu grounded, is the ecu timing still 5* at a normal idle???

Ill try to make it more clear if that doesn't make sense.

Essentialy I timed the car at 5* BTDC without grounding a ECU plug, or using a logger to see my ecu timing, Could it be possible i am off of timing??

 

[Rob10_99]

ok, first off, the plug needs to be grouned/jumped to itself and that's the only time you should be setting timing.

Setting the timing is a bit of a pita because you can't really see where the marks are exactly. Sure, you can see the notches in the pully and the pile of shit timing cover we all should be using. But the accuracy of them isn't that great.
I would suggest using a white paint pen on your pully and looking at it from the wheel well,
From what I know about 2g's is that they require the same tech as the 1g's for setting base timing. (not sure, I don't like 2gs so I could care less)
Are you having issues with timing now or what?

 

[EclipticalGS]

No, im not having timing problems that I can see, but i dont have a logger...

I was told some people that my year, 97-99 do not have a Ecu grounding plug...

So, all I did was aim the timing light at the crank pulley, and I turned my 1G CAS until the marks showed 5* BTDC...

Now im concerned with two key points...

*Do I have a ECU grounding plug?
*Do i need to see my ECU timing advance via (datalogger) and match that to my Timing light advance?

 

[350war]

You need to ground it to take the computer out of the loop to set ignition timing. You dont need a logger to set or check timing it can all be done with your timing light. Once you pull the ground off the timing plug using the timing light you will see the computer advance your timing 3-5*. Make sure your idle is set correctly.

 

[DSMopar]

No you have it right, these other guys don't know what they're talking about.

Visual Frequently Answered Questions - Home Page

You need a logger and you need to match the timing with what the ECU 'thinks' it is and with what the light says. Just make sure you don't use a dial back style light (or if you do have it set to 0)

 

[350war]

Timing can be set without a logger.

 

[EclipticalGS]

It can but not correctly

My car does not have an Ecu Grounding plug.

What if at normal idle operating temp, my ecu shows 8* timing advance, and i dont have a logger to see that, then I set my CAS to 5* timing with the timing light, that means I just shifted my Base timing..

Now am I really running under 5* btdc??

Base timing = Ecu timing w/ Timing light advance....

If my ecu was showing 8* at idle, and I set my cas to 5* then that means my real BASE timing with the ECU grounded would be 3* under the 5* i set it at...so 2*?? Does this make sense?

"Start the engine again and check the timing again. The correct basic ignition timing with no jumper wire is 8* BTDC. "

VFAQ, well that helped out, but do i still need to set timing with my ecu grounded?? or not?

 

[DSMopar]

It can but not correctly

My car does not have an Ecu Grounding plug.

What if at normal idle operating temp, my ecu shows 8* timing advance, and i dont have a logger to see that, then I set my CAS to 5* timing with the timing light, that means I just shifted my Base timing..

Now am I really running under 5* btdc??

Base timing = Ecu timing w/ Timing light advance....

If my ecu was showing 8* at idle, and I set my cas to 5* then that means my real BASE timing with the ECU grounded would be 3* under the 5* i set it at...so 2*?? Does this make sense?

"Start the engine again and check the timing again. The correct basic ignition timing with no jumper wire is 8* BTDC. "

VFAQ, well that helped out, but do i still need to set timing with my ecu grounded?? or not?

Uhh I don't get it, in the same post you said you don't have grounding lead, then asked at the very end if you still need to ground your test lead?

We've been through this, you don't have one. Do like I said in my previous post, get a logger and match timing with what it says...

 

[EclipticalGS]

ok, but at a normal idle, the logger will say 8* timing anyways....So can i just use my timing light at set it to 8*???

Only at base idle (grounding lead grounded) the timing is set to 5*. But without the ECU grounded, it's 8*

"The correct basic ignition timing with no jumper wire is 8* BTDC. "