SheDrivesIt

Those old shitty cars were great. I had a clapped out Duster that dieseled forever too. My favorite part was the final gasp as it eventually shut down. It sounded like it died.

heffergm

[QUOTE=SheDrivesIt,Aug 4 2006, 06:05 PM] Those old shitty cars were great.

44Runner

"Dieseling" is not the correct word for this. Dieseling is when a gas engine continues to run without spark. As someone mentioned earlier this cannot happen with a fuel injected car because with the ignition off fuel is no longer being delivered. The little shaking that you feel when you turn off the F20C is a side effect of very high compression. Due to this high compression and the lack of a large heavy flywheel the engine comes to a more abrupt stop that you would have on other engines making turning off the engine more violent then you are used to. Diesels of course do do this very same thing but to a greater extreme (I drive one every day). With the F20C you are dealing with an 11:1 compression ratio. My CTD has a 17.2:1 compression ratio not to mention a much greater rotating mass. Shakes the hell out of the whole truck...

SenderGreen

Thanks for the expaination, I had always wondered what caused this. I had speculated a long time ago that it may due to abscence of DOHC stabilizer shafts. I was told this was likely not the case as other 2 liter engines without DOHC stabilizers shafts don't necessarily exhibit this behavior. At least mass had something to do with it. So, high compression and low rotational mass is the correct answer, thanks again.
I'm gonna miss telling people it's because they don't like to be switched off.