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Join Date: Jan 2002
Location: Massachusetts
Posts: 238
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How do I relieve fuel pressure to install FPR
I want to put on the 3.0 bar fpr I got. Just thought of this and i am at work. Is there a fuse for the fuel pump I can pull while the car is running till it stalls to relieve fuel pressure in the fuel rail? Is this OK. ANy other method?
John |
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06-20-2002, 12:42 PM
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Join Date: Mar 2002
Location: London, UK
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Sounds like a good idea. Don't know if there is a fuse. There is a relay that you can pull out but that one may also stop the ECM at the same time, so not suitable to relieve pressure. Do the work in open space and just remove replace the FPR,don't worry about the little petrol spil.
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06-20-2002, 02:59 PM
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Location: independence ks
Posts: 219
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underneath the dash, second fuse from the end
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06-20-2002, 04:39 PM
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just take off the cap at the end of the fuel rail. Lay a rag under it to catch the fuel.
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84 944(sold) 85 944 86 951 87 944(sold) 87 951 88 951 Turn up the BOOST!!! |
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06-20-2002, 05:38 PM
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Location: Wisconsin
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I would do it after the car has sat overnight and is stone cold, place a rag under the end cap and loosen it. You'll be surprised how little fuel comes out. Have a fire extinguisher nearby.
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06-20-2002, 06:04 PM
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You will be surprised how little fuel comes out the end rail and then how much fuel gets dumped when you remove the regulator.
 Pulling the fuse for the fuel pump should do the trick to drink all the gas left over in the fuel rail.
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'89 951 Alpine White, Black Leather |
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06-20-2002, 07:33 PM
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yeah, put a rag under the regulator/damber when you remove it, because fuel will still come out. I have never had a problem with countless removals.
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84 944(sold) 85 944 86 951 87 944(sold) 87 951 88 951 Turn up the BOOST!!! |
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06-20-2002, 08:21 PM
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I pulled the fuse for the fuel pump sender under the hood. My car is an 86 951. I looked in the haynes before and it said pull the one in the footwell. I didn't. I pulled the one under the hood, the car died in 4 seconds. I pulled the fpr off and AAAAGHH!!! Fuel starts squirting under pressure. Was only a few seconds and i had a tone of paper towels ready. Oh well, 5 minute job.
John 
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06-21-2002, 04:40 AM
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well.........i told ya so........j/k
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84 944(sold) 85 944 86 951 87 944(sold) 87 951 88 951 Turn up the BOOST!!! |
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06-21-2002, 09:30 PM
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Location: Viera FL
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Always had good luck doing the following
Remove gas cap Crimp fuel feed hose Start car pull fuel pump fuse Wait for car to stall. AFJuvat |
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06-21-2002, 09:48 PM
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I don't mean to beat a dead horse, but man, that is an awful lot of work compared to laying down a couple of rags.
OK, i'll shut up now.
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84 944(sold) 85 944 86 951 87 944(sold) 87 951 88 951 Turn up the BOOST!!! |
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06-22-2002, 02:29 PM
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I agree, but I have found that it isn't as messy. Only takes about 2 minutes to do.
AFJuvat |
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06-24-2002, 09:48 PM
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1989 Porsche 951 2.5L Turbo I-4 
