Re: 928 Fuel system shutdown -- 928S4VR Forum

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Date Posted: 21:14:36 06/23/04 Wed
Author: Rich
Author Host/IP: 24.221.8.85
Subject: Re: 928 Fuel system shutdown
In reply to: dan baker 's message, "928 Fuel system shutdown" on 06:38:26 06/16/04 Wed

Dan, thanks for the note, I'm glad that your problem was fixed.

Just a little correction. My website is www.electronikrepair.com and the best way to reach me is at info@electronikrepair.com

Rich
>
>928 Porsche Fuel injection system shutdown.
>
>�You have twice as much good luck as you have bad
>luck.� �Chinese proverb
>
>A complete shutdown of the fuel injection system in
>the 928 is often caused by a circuit failure in the
>ECU or brain. The brain is located behind the
>passenger side kick panel, and is the larger of the
>two control units. Naturally, it�s the hardest one to
>remove.
>
>Failure symptoms may include a shutoff of the fuel
>pump, and a woodpecker noise in the intake manifold
>during cranking, and intermittent stalling. The car
>will often idle but will die whenever the throttle is
>opened. Onset can be sudden, or produce a lingering
>intermittent stalling problem.
>
>First impulse is to test the pump and pump relay, but
>hot-wiring the pump itself can test this. If the pump
>runs, and If the car still won�t run above idle, in
>all probability it�s the ECU. The Bosch ECU used a
>hybrid circuit board in the 928 that produces the
>above condition when it fails. Parts sources will
>quote you between $750-$1400 for a rebuilt unit which
>will send you flying to the Internet.
>
>During my search I ran across an important article on
>the serious, car killing flex plate design problem in
>automatic trans 928�s, so I called the originator of
>the article, Exotic Motorwerks in Phoenix. I asked
>about ECU re-builders and they kindly referred me to
>Richard Andrade and Electronik Repair in Mesa,
>Arizona.
>
>Richard is a well known 928 enthusiasts and electronic
>engineer. He has studied the problem and developed a
>rebuild with a master ECU rebuilder in Europe, that
>replaces the faulty hybrid circuit with vastly more
>reliable components. Total cost was substantially less
>than the quotes I had in hand, and turnaround was two
>days! I was able to get back on the road, avoid
>storage charges, and I learned a lot about the 928 in
>discussions with Richard. By the way, he is looking
>for a few cores so if you happen to learn of an
>orphaned 002-504 series 928 ECU give him a call.
>
>Further, Richard produced a very comprehensive PDF
>file to troubleshoot the ECU problem, which is
>attached. If you are going through an older S4 you
>might consider this as a preventative procedure, as
>many ECU�s are failing in the 928, and the problem is
>not something you want to deal with while breaking in
>a new romance on a road trip.
>
> Richard is prominent in the national 928 club and
>both knowledgeable and helpful. His website is:
>WWW.electronickrepair@earthlink.net
>
>Ask Richard for a PDF copy of his article on the flex
>plate tension problem in auto trans cars, and check
>for this condition on your car. Un-corrected this
>problem can lead to the complete loss of an engine,
>which is a memorable inconvenience in a 928. Now, for
>those of you who would like to sign the ballot
>initiative to eliminate the California Highway Patrol,
>break into groups by first letter of last name�
>
>Dan Baker
>Lake Havasu, Arizona

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