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testing fuel pressure regulator

posted by  Matt L on  Wed Feb 6 11:02 CST 2002
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last visit: Mon Aug 23 08:46 CST 2010
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Thanks for the help. I think there is definitely something wrong with this regulator. I pulled the return line off of the regulator and it was dry (I had just turned the car off a minute before). I attached a piece of rubber tube I had laying around and put the other end in a pan. When the car is idling, vaccuum hose attached to the regulator, no fuel came out into the pan. Then I pulled the vaccuum hose off of the regulator, car still idling, and still no fuel came out into the pan. There is definitely lots of vaccuum in line connected to the regulator, so I think the regulator must be broken, because I never saw any fuel come out of the return side in any situation. Agree?

So I have my other project car, an '89 740 sitting in the driveway waiting for me to finish working on this one ('87 240). Can I take the regulator off the '89 and put it in the '87? They look the same, but have different part numbers... '87 240 p/n is 0 280 160 214... '89 740 p/n is 0 280 160 294.

Thanks!






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