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Join Date: Apr 2009
Location: Israel
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Fuel filter question
Hi all
As always I am getting more and more surprises while working on my 928... Today I wanted to replace the fuel filter. I bought a nice new KL21 filter but when I removed the rear wheel in order to replace the fuel filter I found some other filter type...  ..I have attached a picture of it.can somebody tell me what kind of fuel filter is it? all metal hoses seems to be genuine but the shape is different then what I have expected.. 
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Porsche 928S 4.7L 1980 European redhead 
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06-13-2009, 01:01 AM
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On second thought it doesnt look like a filter but as the fuel pressure reservoir...if so then:
1) what does it do? 2) where is the fuel filter?! can it be that my lovely previous owner removed it? Maybe someone can post some pictures with that area so I will be able to see how it should be? Thanks!
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Porsche 928S 4.7L 1980 European redhead
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06-13-2009, 01:26 AM
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Network Native
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Location: SoCal
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Doesn't look like a Porsche part to me. Somebody posted a pict of the fender fuel pump, but I didn't find it looking just now, maybe it will be repeated.
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06-13-2009, 01:42 AM
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Shouldn't the 80 Euro be next to the fuel pump under a plate at the rear bumper? My 81 Euro is.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD** 
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06-13-2009, 06:01 AM
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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06-13-2009, 06:03 AM
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Autobahn Garage
Join Date: Jun 2003
Location: Ohio
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That's the fuel accumulator for the CIS
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T Tanner 76, 911s w/ Webers 76, 914/4 57, Speedster |
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06-13-2009, 06:11 AM
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Quote:
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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06-13-2009, 06:16 AM
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Autobahn Garage
Join Date: Jun 2003
Location: Ohio
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It holds fuel presure for the CIS system, They go bad somtimes the symtoms will be hard starting when warm or a strong fuel smell near the accumulator. No maintanance needed if it's work correctly
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T Tanner 76, 911s w/ Webers 76, 914/4 57, Speedster |
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06-13-2009, 06:25 AM
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Awesome info! The things we learn here are priceless.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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06-13-2009, 07:55 AM
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Autobahn Garage
Join Date: Jun 2003
Location: Ohio
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If you really want to check it out, do a pressure test on the CIS system, with the pump running record the pressure then switch it off and you sould see the pressure drop a small amount then it should hold there for 15-20 min. If not you have a fuel pump check valve leaking or a bad accumulator. Also there is a small screw in the bottom of the accumulator that you can take out and see if fuel is present if so the unit is bad
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T Tanner 76, 911s w/ Webers 76, 914/4 57, Speedster |
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06-13-2009, 09:17 AM
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Wow, thanks! it really is an awesome information!
My car does starts hard when it is warm so maybe this unit is faulty. I will look under the rear bumper area for that hidding fuel filter.. Thanks!
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Porsche 928S 4.7L 1980 European redhead
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06-13-2009, 11:38 AM
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It's function is to even out the fluccuations in the pump pressure during acceleration, cornering, etc.
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Dennis |
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06-13-2009, 11:54 AM
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http://***********.com/model/928-78-82/201-05.htm
item 29, part number varies by vin, and I see two of them. 928 110 197 05 fuel accumulator 1 F >>92882 00053 F >>92882 09521 F 92882 00054>> F 92882 09521>> F >>92892 01042 F >>92892 09557 928 110 197 07 fuel accumulator -79 1 F 92892 01043>> F 92892 09558>> I think 0 438 170 026 is the superceded Bosch part, which may have better pricing, but looks like you need to be very sure you get what is correct for your car. 
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06-13-2009, 11:59 AM
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Both of those pictured are the later versions that have a safety fuel line that sends any leaking fuel back to the tank. The older versions, like the first picture, only had a plug and these often leaked if the internal diaphram was busted.
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Dennis |
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06-13-2009, 12:13 PM
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1978 Porsche 928 4.5
