<VV> Die! Dieseling Corvair, Die!

[Charles Lee at Proper Pro Per]

Isn't it just that part of the combustion chamber (dirt, whatever) gets so 
hot that it ignites the fuel/air coming in, regardless that there is no 
electric spark to ignite it ?

Lots of ways for that to happen, right ?



----- Original Message ----- 
From: "Chris & Bill Strickland" <lechevrier at earthlink.net>
To: <virtualvairs at corvair.org>
Sent: Sunday, September 10, 2006 11:55 AM
Subject: Re: <VV> Die! Dieseling Corvair, Die!


> In a message dated 9/9/2006 6:28:06 PM Pacific Daylight Time, 
> rusecular at yahoo.com writes:
>
>> What causes dieseling or post ignition and how can it be tamed? - cooler 
>> plugs, advancing/retarding the timing, or .... ?
>
> Since the key has been turned off, the ignition system is out of the 
> picture, so it must be something besides timing, plugs (in the normal 
> sense), dwell, etc.
>
> A properly adjusted anti-dieseling idle solenoid will probably work, and 
> so might an engine rebuild with a nice, clean combustion chamber -- but I 
> have seen some vehicles with these two features still 'diesel' upon 
> shutoff.
>
> The two keys to controling it are a 1) a low idle speed, and 2) higher 
> octane. If the first doesn't work for you, you'd better hope the second 
> does, otherwise you're back to engaging a drive gear, turning on the A/C, 
> headlights, heater fan, wipers -- whatever loads the engine to slow it 
> down more.
>
> What causes it, I don't know. Bob Helt might say that it is not enuf 
> 'squish' in the combustion chamber, while the next guy will say it is too 
> much compression, and Bob will come back and say "hot spots".
>
> Godspeed,
>
> Bill Strickland
>
> PS: nice re-subjecting, Seth    :-)
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