The manual said I want my timing at 6 btc. I plugged the single vacuum advance opening and had the timing dead on at 6 btc but the car was idoling around 1050. When I hooked up the vacuum advance my timing went through the roof. With the advance on it had the timing well passed the 10 atc mark (like 3 times as far) I turned the idol screws on the carb all the way closed but it didn't help with the idol much. It is a 302 2v. Can anyone tell me what I'm doing wrong and do I want it 6 btc with the vacuum advance hooked up?I have never done it b4 so it's all from what I've read in the manual (which is useless for this) or online stuff. Thanks.

 

6 degrees BTDC is the recommended starting point for timing. Disconnecting and plugging the vacuum lines is recommended, so it sounds like you did that correctly. I think a good idle speed is around 800 RPM for an automatic and a little less for a manual transmission. When you reconnect the vacuum advance, there really shouldn't be any noticeable difference in how the car runs at idle. Is it possible that you are plugging it into the manifold vacuum port instead of the timed vacuum port?

 

I put it in the single vacuum advance on the distributor.. http://www.mustangsunlimited.com/ite...asp?T1=VC31+01This thingy.

 

My vacuum pressure on the vacuum reader is around 25. (the reader only goes to 30)

 

How about the other end of the vacuum line that is attached to the vacuum advance? That's what I was referring to, where is it connected?

25 inches? Wow, that's pretty high. Usually anything between 15 and 20 inches is good. What RPM's are you at when you get the 25 inches reading?

 

Not sure where the back of the hose connects,I will check tomorrow evening. The RPM's are pretty high with the vacuum advance hooked up, around 1600. I can close the idol screws all the way and it doesn't change much.

 

The other end of that vacuum hose should be connected to the timed vacuum port on the carb. I have a feeling that it is connected to regular manifold vacuum and not the timed port.

1600 RPM's are way too high for idle. Hopefully connecting the vacuum line to the correct port will fix this. Check it out and let me know. Pictures might help if you are able to take and post some.

 

Thx NorCalTroy. I will check it out tonight. I appreciate you taking the time.

 

+1 on checking which vacuum port you are hooked to; timed vacuum port is the correct one.

 

Does anything plug into the manifold vacuum? I think My breakbooster is but anything else?