New Vacuum Advance

[wildejon 7]

I have been having engine trouble at idle for a while now and I recently discovered the vacuum advance was shot. I have now replaced it (literally just now) and its revving a lot higher. Would the now operational vacuum advance be affecting the mixture or can I just set it back to the correct point via the idle screw?

 

The revvs do seem to be taking a while to drop back down to idle after I blip the throttle... I'm guessing that means the mixture is a bit out but could anyone advise me? I wanna go for a proper test drive!!!!

 

Thanks in advance!

[hengti 2]

i always thought they only affected part throttle fuel economy

 

did you take the distributor off to replace the advance unit? if so, are you sure you put it back in exactly the same position?

[wildejon 7]

i always thought they only affected part throttle fuel economy

 

did you take the distributor off to replace the advance unit? if so, are you sure you put it back in exactly the same position?

 

Thats what I thought too, but I guess it lets air leak when its split no?

 

I did take the dizzt off yeah, and I did my best to get it exactly where it was, its as close as can be Marked it in 2 places just to be safe...

[Gentrix 2 1 Cars]

Thats what I thought too, but I guess it lets air leak when its split no?

 

that´s right - it is an airleak if it´s broken, so you might have to calibrate your settings for a now airtight system *g*

[wildejon 7]

Tell you what, despite what I've read on here about the vacuum advance not having an effect on power, it certainly must have caused a drop in power when it broke as it don't half pull now!!!

 

Sounds heaps better too, I do think the timing might be ever so slightly out but its a huge improvement AND it idles perfectly :-D