[TR] Can't Remember

[Greg Lemon]

As Randall said I doubt the dieseling is being caused by the vacuum line being in the wrong hole unless it is messing up your ignition timing, causing the car to overheat.

our old cars still suck fuel out of the carbs when you turn the motor off, so they can diesel for an impressive mount of time, although eventuall the fuel will empty from the float bowl and it will stop, but you don't want it to do that so kill it with the clutch.

Carbon build up from running too rich can raise the compression ratio and or cause hot spots which cause dieseling

too lean a mixture can cause it to run hot, causing dieseling

timing too far retarded can cause it to run hot, causing dieseling

poor cooling system (crud build up in the block or radiator itself) can cause it to run hot and cause dieseling.

Lots of causes and cures, newer motors sometimes do it because clearances are tight and they run hot, older because of the aformentioned carbon build up.  

A couple hits after the car stops is not uncommon for "our" cars, but ongoing run on is, I don't know what you have done to the car recently, but I would focus on anything that might have changed recently since I read your post to say it didn't usetodoit and now it does.


From: William Pugh 
Sent: Saturday, June 13, 2015 1:49 PM
To: TR3/6 
Subject: [TR] Can't Remember


I finished fixing the gas leaks on the TR3, went for a nice ride, everything worked, engine ran fine. 
Until
I came home and turned off the ignition, and the car started dieseling I let it go thinking it would buck a couple of times and quit.
Nope, just kept going, had to stick it in gear and engage the clutch to stop it.


Bummer


Been going through the steps and the only thing that might be different is where the vacuum advance pipe connects to the SU.
I remembered when I was putting everything back together there were TWO holes on the bottom of the SU.


If there is any difference in using either hole, I probably picked the wrong one.


What say you friends??


Thanks




"Life is too short to drive boring cars"

Bill Pugh
1957 TR3 "Casper"👻
TS16765L
Wallace, CA
anabil007 at comcast.net🐔




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