William, Usually, if the idle is high, it has to do with the idle speed
motor. When you turn the key on the idle speed motor cause's the butterfly's
to open for just the start up. Once car starts the ISM then changes
direction and brings the idle back down to normal setting. I bought a car
once that was stuck on high idle. That's the reason the guy sold it. I took
a pair of needle nose pliers and grabbed the arm on the ISM, turned it
towards the front of the car.With that little pressure, the ISM motor came
loose from it's stuck position and worked perfectly from then on. Bob
----- Original Message -----
From: "William" <mopar@xxxxxxxxxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Thursday, April 10, 2003 10:53 PM
Subject: IML: 83 EFI question, troubleshooting, long....
> Good day everyone,
> I am slowly chipping away at my project '83, and am currently trying
to
> set the EFI to rights. To begin with, the car would idle poorly and stall,
> at least until it was fully "warmed up". Since I had just dismantled a
very
> nice running EFI Imperial, I decided to switch some of the parts from the
> known good car, to the rough running one. I switched the temp sensor, the
> entire HSA, and eventually the CCC and airflow sensor (whole aircleaner
> assembly). The only part that I didn't use off the good runner was the TPP
> (misplaced the known good one), which I took from a spare HSA. I tested
for
> variable resistance across the leads and was satisfied it was working, so
I
> used it.
> Now, the car does not stall; I have just the opposite problem, it
races.
> I am guessing about 1500rpm. I have looked through the FSM (from Ken McGee
> auto literature, worth every penny!) and I am coming up a little short. My
> first guess was the AIS unit, but I tested another spare, and it didn't
> "move" when the key was turned on, as it was indicated in the FSM. The
> throttle blades appear to be fully closed, so I have pretty much ruled
that
> one out. Could the TPP be faulty or installed improperly? This leads me
back
> to the basics; could it just be a vacuum leak? I would expect a vacuum
leak
> to cause stalling, not racing in this set-up due to the airflow sensor,
> however, I am unsure. I tried to carefully reseal the HSA to the manifold,
> but....
> It is also worth mentioning that I have not allowed the car to warm up
> since I have had this trouble. I have read about the automatic calibration
> that the computer does, but I wasn't sure that it would cause this
problem.
> Do I just need to let it warm up and "calibrate" itself (sounded too easy
to
> be true!)? I know I am being lazy, but I thought I would check and see if
> this was symptomatic of something simple before I attempted to try and
find
> the needle in the haystack. I sure wish I had one of those diagnostic
> computers they use in the manual! As always, any input is much welcome and
> appreciated.
> Cheers,
> William
>
>
>
>
>
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