Well, I think non-AC cars had the throttle stop solenoid set so that the throttle plates would close fully when the engine was shut off. On an A/C car the throttle stop solenoid is set to kick up the idle a little bit when the A/C is on. The throttle plates can be open a little which provides an opportunity for dieseling. Joe Fulton Salinas, CA --- Tom Jennings <tomj@xxxxxxx> wrote: > On Fri, 2004-09-24 at 12:07, JOE FULTON wrote: > > > Turns out it was coming from the anti-dieseling > relay > > found on the Iron Duke cars with A/C. It's > function > > is to activate the A/C compressor clutch for a few > > seconds after the engine is shut off to ensure > that > > the engine does not "diesel" or run on. It took > me > > awhile to figure out what this device did (and > what it > > was) but it is explained in the TSM. Thankfully > the > > part number was stamped on the relay. > > WHAT A KLUDGE!!! So what did non-A/C cars get?! > Deiseling?! > > > > >