[DML] Re: automatic in Park [was: Lambda system]
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[DML] Re: automatic in Park [was: Lambda system]

I'm not a *DELOREAN* automatic owner, but:

Automatic transmission pumps place a significant load on an engine
(oftentimes more than an A/C compressor). In theory CIS should
compensate. In actuality yours seems to be acting quite out of spec,
especially since it's happening on a warm engine.

Basically your DeLorean is behaving like an older model carbureted
vehicle with a dead automatic transmission solenoid (would otherwise
press against the throttle linkage when the AT pump was engaged). When
those solenoids die, most owners of such vehicles usually just bump
the idle speed up a bit. Moving the transmission from Park (engaging
the pump) brings it back down.

1,500 RPM seems a tad high, but I'm used to large displacement engines
that only lose a hundred RPM from the AT pump. Does the DeLorean
automatic really place a 600 RPM load on a PRV?

Bill Robertson

>--- In dmcnews@xxxxxxxxxxxxxxx, Farrar Hudkins <fhudkins@...> wrote:
> I agree, 950 is good, especially since below there the car shudders. 
> (Although it's relaxing if my back muscles are tense...)
> Segue time! Here's a question for you automatic owners:
> When you're parked and put the car in "Park" prior to turning it off, 
> does the car rev up? Mine does. Not as badly as before, but approaching 
> 1,500rpm when I shift from "Drive" to "Park" -- only after a drive, not 
> when I start it up.
> No big deal, but it is something I've never seen any other car do.
> By the way, I've uploaded some photos to the pic directory "2613" on
> Yahoo Groups site.
> Cheers,
> Farrar Hudkins
> #2613

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