Fuel pump question

PorscheFanatic · 10-16-2009, 07:37 PM

Will the fuel pump from an 1986 928S work properly if its installed into a 1980 928S euro? I thought maybe they possibly were the same pump, but maybe not.

MPDano · MPDano's Garage

Use a proper one for your CIS. It has the longer neck. You may also have a 2nd one at the inlet of the tank (in-tank).

EIPtuningR32 · EIPtuningR32's Garage

Quote:

Originally Posted by MPDano

You may also have a 2nd one at the inlet of the tank (in-tank).

so if and when i need to change my pump, iam going to need to change two?.........great.................

JhwShark · JhwShark's Garage

It's not that hard to replace either or both...remember they have gas in them when you take them down...
Be careful when working with parts (petrol/gasoline) and battery or volt generator around.
Have you tried checking then cleaning your's -- take them off and put 12v to them then reverse where you put your two leads. Is the pump spining or not in both directions? If you have a jar of petrol then put hoses from pump to jar when testing cleaning.

DPW928 · DPW928's Garage

The in tank pump (if equipped) should be the same for most years BUT the external pump needs higher pressure for the CIS injection system in your 928.

MPDano · MPDano's Garage

Also FYI, I only changed the external pump on my CIS. I just gutted my internal one since it was not working. My car runs fine although on quick right or left hand turns, it does lean out a little.

Don't drive like your in the Grand Prix and you will be fine.