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Old 08-05-2003, 06:20 PM   #1
lacast
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Default When is it time to replace the fuel filter?

When is it time to change the fuel filter? I don't know if the PO ever replaced it. The car seems a little sluggish. Replacing the fuel filter will it help or maybe cleaning the fuel injectors.


any suggestions..

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Old 08-05-2003, 06:26 PM   #2
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"The car seems a little sluggish"

There are a whole host of items which could cause this, one of which is the fuel filter.
I would as a matter of course when buying a new car (unless the PO has provided detailed records and you trust them) replace all the filters and fluids so that I have a baseline for my own maintenance program.
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Old 08-05-2003, 06:28 PM   #3
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Iancast,

Not sure what the recommended interval is on the filter, but I saw them for $11.50 at one of the big 3 and to change it is very simple. So, basically if your not sure of the last change, It would a cheap and easy thing to rule out now and in the future.
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Old 08-05-2003, 06:32 PM   #4
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Thanks... I have replaced the spark plugs,dist cap, rotor, oil change\oirc filter,air filter. I haven't replaced the coil...is it recommended to be replaced after so many miles...


thanks again
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Old 08-05-2003, 07:01 PM   #5
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I seem to remember the Porsche recommended change interval being 60k. The Devek catalog I have in front of me recommends 30k. Our cars live and die on fuel cleanliness, so I've heard of people swapping them out even more frequently - not totally unreasonable given that the fuel filter is cheap, and can easily be changed without jacking up the car.

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Old 08-05-2003, 07:26 PM   #6
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coils have no moving parts as such there is no wear . Porsche coils last a very long time ......20 years is a very long time .....many more ignition problems come from bad wires leaking out the electricity . The recommended interval for fuel filter is ......NEVER ; according to the 1986 maintenance booklet . I have asked on more than one occasion on various lists if ANYONE ever "fixed" a 928 by changing the fuel filter .......to date the answer has been NONE.........
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Old 08-05-2003, 08:26 PM   #7
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I recently replaced my fuel filter in hopes of fixing a stalling problem. Like Jim said, it didn't fix the problem. But, I have to say that at least in my case I think that in a small way I am helping out my 928. My old filter weighed about twice what the new one weighs. So there is a ton of crud that accumulates in there. I had an extra "new & clean" filter, so that comparison is not based on wet vs. dry.

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Old 06-07-2009, 08:47 PM   #8
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Hi,

I'm in Africa where there is no porche service center but I have the 2004 Cayenne S model and I need to replace my fuel filter, can someone help me with step by step instruction? Thank you so much!
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Old 06-07-2009, 08:54 PM   #9
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Syongo there is a Cayenne forum on Rennlist that would be a better place to post your question
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Old 06-07-2009, 09:49 PM   #10
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Clean fuel it step 2 on my troubleshooting list.
Behind fuel.
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Old 06-07-2009, 11:11 PM   #11
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Quote:
Originally Posted by Jim bailey - 928 International View Post
coils have no moving parts as such there is no wear . Porsche coils last a very long time ......20 years is a very long time .....many more ignition problems come from bad wires leaking out the electricity . The recommended interval for fuel filter is ......NEVER ; according to the 1986 maintenance booklet . I have asked on more than one occasion on various lists if ANYONE ever "fixed" a 928 by changing the fuel filter .......to date the answer has been NONE.........
How many people have had to replace the fuel pump(s) because of a partially or fully clogged filter.

And bad fuel pumps will make a car not run.

Granted, I know little about the 929 compared to you Jim.

But to say fuel filters are lifetime parts, come on Jim.

Lets just say I am going to change mine, and change the fuel filter in every car that gets a fuel pump, regardless of make, that comes into my shop.

I change mine at least once a year if they driven or not.

Greg Nettles
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Old 06-08-2009, 01:53 AM   #12
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actually filters clean better as they get older. Its only when they restrict flow, do they cause issues. Ive pulled out some old filter and poured out some pretty black gas, but thats going out. dont think the car ran any better, but that was after 4-5 years.

I never change filters in my BMW and its running like a champ. Both oil and fuel filters are original and thats after 110,000miles. I think I change the tahoe oil filter every 5 oil changes.

The funny is the air filter. I never change them on any of my cars, NEVER. Only the race car gets that changed. They say you get beter gas mileage with changing your air filter in an FI car, but "They" are morons!

I have a fuel filter that is to go on the holbert car. I usually change it every year, but as with most people, its more of a "feel good" change.

mk

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How many people have had to replace the fuel pump(s) because of a partially or fully clogged filter.

And bad fuel pumps will make a car not run.

Granted, I know little about the 929 compared to you Jim.

But to say fuel filters are lifetime parts, come on Jim.

Lets just say I am going to change mine, and change the fuel filter in every car that gets a fuel pump, regardless of make, that comes into my shop.

I change mine at least once a year if they driven or not.

Greg Nettles
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Old 06-08-2009, 02:07 AM   #13
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Quote:
Originally Posted by lacast View Post
When is it time to change the fuel filter? I don't know if the PO ever replaced it.
Do it for this reason alone.
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Old 06-08-2009, 02:10 AM   #14
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The fuel filter change on my car did make a difference. Sorry Jim I'm not going with you on this one
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Old 06-08-2009, 02:16 AM   #15
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Best time to change it is just before you experience sngs o fuel starvation under max load. This kind of change interval is impossible to justify since you never see symptoms. But that's kind of the point-- you really don't want to ever see symptoms.

Do it when the tank is almost completely empty. Do it outside, away from the house. Do it with a charged garden hose and a fire extinguisher handy. A BIG fire extinguisher... Make sure you have the copper seals for the banjo connections on the filter. Make sure you clamp the line between he pump and filter so the tank doesn't drain down your armpit as you get the fittings loose. Do counterhold the filter as you loosen the banjo bolts. This is a job where it' usually more prep and safety than work. Usually... Don't twist the line between the pump and the filter.
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Old 06-08-2009, 02:16 AM
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