Thanks Bob. That answered my question. I intend to replace the EGR and it
appears thee is no way around removing the support plate assembly to get at
it.Looks like it is time to get dirty At least the tester shows all EFI run
signals are good before I get into it, so it shouldn't be too bad afterward,
providing I put everything back the way it was!Quoting Bob Harris
<b1werks2@xxxxxxxxxx>:
> Kurt -
> Whether the EGR Valve works or not, there are two metering ports, (one for
> each bank of cylinders), installed in the bottom of the manifold, under the
> Support Plate, with small holes in them to admit gasses into the mix. If
> these are clogged, the whole EGR concept is worthless, moreover, the
> passage
> between the EGR Valve and these ports is usually clogged with tars,
> especially on high-mileage cars, and the system won't work. Not employing
> the EGR Valve is your choice, but if it has a defective or leaking vacuum
> chamber, you'll have a lean mixture and then EFI will be unable to
> compensate for this since it occurs after the information for the correct
> Fuel-Air Mix is determined. If you remove it, then use a blank plate to
> cover the opening.
>
> The "melting" of the potting compound is usually from original equipment
> modules. If it gets into the throttle plate bores, it'll disrupt the
> operation. Use the same cleaner for the Throttle Plate as is used to clean
> the upper dish and modules. Carb cleaner and/or a similar substance. It's
> messy and takes time; must be done. Hope this helps.....Bob Harris
> ----- Original Message -----
> From: "Kurt Piepenburg*" <trukkcp@xxxxxxxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Monday, September 02, 2002 8:48 PM
> Subject: Re: IML: 1981 Potting Material
>
>
>
>
>
Back to the Home of the Forward Look Network