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04 Cayenne - Fuel Filter and Pump Replacement

 
Old 11-18-2018, 01:03 AM
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955 CTT (2004)
Just to ensure I understand the fuse layout.

If I pull fuse 13, I am running on the right (passenger side) pump or secondary

If I pull fuse 14, I will be running on the Left (DS) fuel pump, or the primary pump.

Is that correct? TY
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Old 06-21-2019, 12:23 AM
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Default Re: driving on one fuel pump (secondary)

Originally Posted by Cayenne S2004 View Post
Hi there! Newbie here. Need some help. According to what I've read so far, the left fuel pump on my 04 Cayenne S has or is failing, as per the tests, I removed fuse 14 and engine did not stall. I'm going to replace the pump and filter, so I have to order the parts. My question is, can the truck be driven safely with only the right pump running?

**not saying anyone should, but...I drove on secondary only for just over a year, until it too failed. Test car, 2004 Porsche Cayenne Turbo, testing time from 130,000 miles to 140,000**
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Old 06-21-2019, 12:25 AM
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**sidenote, fuel mileage was not affected and performance seemed to be strong
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Old 06-21-2019, 08:04 AM
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Primary pump provides 2/3 more volume of fuel than the secondary pump. Just from memory though.

That little guy was ran to death.
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