Question about 1989 Porsche 928

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Looking for an engine diagram for a 1989 Porsche 928 S4; I would like to explain to my kid the internal combusion cycle for this motor and it looks markedly different from an old standard ford 289.

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Posted on Jan 02, 2017

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SOURCE: Adding automatic transmission fluid to Porsche 928 S4

Mine is an 88 cant imagine its different, thereis a plastic tank on the rhs of the trans that has a screw off lid, you will need the car on stands or a hoist level and with the oil at opperating temp you will also need a bottle pump or some type of plunger to fill it the engine must be running and add the fluid slowly allow time for it to be taken into the trans repeat until at the mark and stays there

Posted on Sep 19, 2009

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Porsche keys Hi, thanks in advance for hopefully answering my question, We've just purchased a 1989 928 Porsche and only have one key for it. We're in New Zealand and it seems there is NO where that


Find the Porsche dealer service centre / parts department as they will have replacement keys and probably a key cutting and programming machine.

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should be located in the passenger side footwell though being that your one right hand drive may be in the drivers footwell behind the side plastic should look something like this
5ce10785-9905-4804-96d5-7b6edae7e9bd.jpg

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My 1985 Porsche 928 S4 cruise con trol activates but drops off @ 1 mile/hr, and then surges heavy to make it back up. this is a rythmic pulsing that goes on to maintain speed. should I be looking...


What you are describing is a vacuum leak in one of the vacuum lines for the cruise control or a bad cruise control vacuum servo. I myself am a former owner of a 1979 Porsche 928 5 speed, a very beautiful and extremely powerful stock automobile. Good luck.

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I'm looking for a 1988 porsche 928 wiring harness diagram


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2 Answers

Adding automatic transmission fluid to Porsche 928 S4


Mine is an 88 cant imagine its different, thereis a plastic tank on the rhs of the trans that has a screw off lid, you will need the car on stands or a hoist level and with the oil at opperating temp you will also need a bottle pump or some type of plunger to fill it the engine must be running and add the fluid slowly allow time for it to be taken into the trans repeat until at the mark and stays there

Jun 15, 2009 | 1990 Porsche 928

2 Answers

Fuel pump not getting power 1985 928s porsche


chck out this site, it has free diagrams etc in pdf format:-
http://www.onlinefreeebooks.net/automotive-machinery-power-equipment-ebooks/porsche/wiring-diagram-porsche-type-928-s-model-89-pdf.html

Your problem can also be with the Bosch ECU, these are prone to failing and also control the fuel pump, they can however be rebuilt.

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Get the Morehouse PET CDs from 928sRUs.com . It's everything you need from parts lists to diagrams and it's cheap!

Nov 25, 2008 | 1990 Porsche 928

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