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Old 03-27-06, 08:00 PM
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illumina illumina is offline
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Cadillac(s): '98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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Re: How to check for a faulty FPR (Fuel Pressure Regulator) and replace it

I have one for you Ranger:

On my 1991 Seville, I have an aftermarket FPR from Aeromotive that is also a boost-referenced regulator (no boost yet ). It is set at 2 PSI above stock ratings. As of late, I have been having some serious cold-start issues to where I have to either crank the engine for several seconds or turn the key off and on enough to build fuel pressure...

I immediately checked the fuel pressure regulator at the vaccum port for leaks, to which I found none. The next thing I tested was the fuel pressure: upon initially turning the key, the fuel pump arms and the fuel pressure rises to where it should be, then it drops to near zero...As mentioned before, I have to turn the key several times again without actually starting the car to get the fuel pressure to stay constant and I also do that so I don't fry the starter (just replaced a bad one today).

Any thoughts on this man?