FUEL PUMP TROUBLE?

There is a check valve on the fuel pump, however befor jumping on that I would open the hood and look in the engine compartment and underneath to make sure fuel is not leaking out somewhere else first. To replace the fuel pump you need to drop the tank. A suggestion, if you do it yourself mark where the pump is in relation to your rear floor then while the tank is out cut a 5 or 6 inch hole under the carpet, use some sheetmetal and screws and some rubber gasket material to make a new cover, por-15 the cut area to prevent rusting. That will ensure you don't have to drop the tank again to change it out. My ex-brother in laws dodge daytona had an access hole in the trunk for this. Do not use an aftermarket fuel pump either, they seem to have a high failure rate.

snipped-for-privacy@netscape.net (Jim) wrote in news:bbb8ca7e.0309150659.135d8e01 @posting.google.com:

The leak-down limit is something like 10PSI in 10 minutes. I think yours still has the separate return fuel line with the pressure regulator on the fuel rail. If so, it could be a leak in the regulator. With the key off, pinch the return line (visegrips, clamp, etc.) turn the key on and back off - just long enough to get pressure on the system. If it still leaks down it's either the pump, a leaking connection, or an internal leak in an injector. Only way to isolate it futjer would be to pull the input line to the fuel rail and see if the bare line leaks down but that takes some fiddling with fittings and such. You might be able to run a good injector cleaner thru the system and see if that helps any - note the rate of the leakdown before and after the cleaner. That's a whole lot cheaper anf easier that a new pump.