[TR] TR6 ZS won'y idle Update

[Dave1massey at cs.com]

You didn't say what year your car is.  If it is a 73 or later it is fitted 
with the Anti-Run-On system.  This system applies a mild vacuum to the float 
chamber when you shut down which has the effect of starving the engine for 
gas so it doesn't run on.  There is a tube running to the charcoal canister 
that vents the top side of the fuel bowl.  There is another port at the carb 
inlet face (inside the air filter) that also vents the top side of the 
float bowl.  The lever to which you refer operates a valve that switches between 
the two.  When the throttle is closed the bowl is vented to the charcoal 
canister.  Open the throttle and the port at the carb inlet is used.

Dave

In a message dated 3/19/2012 7:57:32 AM Central Daylight Time, 
eoot at citlink.net writes: 
> I took a look at the carbs that came out and noticed that the idle screws 
> 
> were down much further that I had tried.  In fact. they were down enough 
> that the pin that the lever pushes against is totally depressed.  What is 
> the purpose of that pin?  I don't see it in my books.  Anyway, I then set 
> the screw down to approx. the same setting.  This pretty much bottomed out 
> 
> the adjustment (screw appears shorter than on old carbs). Started the car 
> and it idles at 8 to 900 without the choke pulled at all. Is the most 
> likely 
> reason for this the cam?  (which was in the car when I got it)..I will 
> check 
> the valve lash as I did find the specs on it. Big difference from stock.  
> I 
> show stock at .010 while this cam spec is .015 inlet, .017 exh.  This seem 
> 
> plausible?