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Smoky Mountain Region PCA
Join Date: Mar 2014
Location: Pikeville, Tennessee
Posts: 174
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Fuel Pump Relay Failure
During a major rebuild of my '82 911SC, the previous owner replaced the fuel pump in January, 2014. The car was not driven much until I acquired it in March, 2014. About a year later, (this spring), the fuel pump relay failed (Chinese generic?) and I replaced it with a "genuine" Porsche relay. Within about 6 months, this relay failed, too! At the time it failed, I had been driving on the interstate for about an hour - when I pulled the failed relay, it was pretty hot - not painfully hot, but quite warm! Luckily, I had a backup relay in the glove box, popped it in, and it has run perfectly since.
My tech, a Porsche specialist, initially said that the two relay failures could be a sign of faulty fuel pump, which is under warranty 'til Jan 2016. However, after a 2 hour drive the other day, I left the car running and felt the relay and it was cool - in fact, some of the other relays felt a bit warmer! After telling the tech the relay was cool after a 2 hour run, he said "let's wait and see if it acts up/fails again before replacing the fuel pump."
Of course, you know what will happen ... if the relay fails again and the pump is suspect, it'll likely be the month AFTER it runs out of warranty! Ha!
The question is - Is it likely I've just had bad luck with a couple of relays or is the pump really suspect or should something else entirely different be checked???
John
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