busa rider
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- Jul 11, 2007
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I'm new to the forum here and wanted say thanks to 97Rover for the AutoZone part number (E3270) and Joey for his repair manual attachments.
My 97 Disco, 108K gas, would start one day and not the next. Sometimes it would be down for a week or more and then come back to life on its own. Very frustrating!
So, I plumbed in a pressure gauge today on the fuel rail and turned on the ignition. 32 pounds in about 1 second. Got the same with the engine running. Pulled the vacuum line off the fuel pressure regulator, with the engine running, and the pressure jumped up to 40 pounds immeadiately. I'm still suspecting the fuel delivery system though because when the engine wouldn't start there was no fuel pressure. By the way, I never could hear if the fuel pump was running or not.
Next, with the engine running, I pulled and replaced the fuel pump fuse and watched the pressure at the same time. Four out of five times, the pressure would bounce back to 32 pounds in about 1 second. But sometimes the pressure would drop down to 5-10 pounds and hold until the engine almost stalled before coming back up to 32 pounds. Ah ha! It's time for a new fuel pump. NAPA's website can cross reference AutoZone's part number (E3270). The best replacement would have been NAPA part DFPFE0111 at $111.04 but AutoZone's pump is close enough. (E3270 is the same pump that's in a 94-96 Chevy Caprice with a 350 V8 at $87.11)
When replacing the pump, you'll also need to replace the flexible fuel line going from the pump to the sending unit with a 5/16" rubber high pressure hose. ($5.00) Details on where and how to replace the pump can be found in other posts. I've been long winded already.
Thanks to all and I hope my story may help someone else.
My 97 Disco, 108K gas, would start one day and not the next. Sometimes it would be down for a week or more and then come back to life on its own. Very frustrating!
So, I plumbed in a pressure gauge today on the fuel rail and turned on the ignition. 32 pounds in about 1 second. Got the same with the engine running. Pulled the vacuum line off the fuel pressure regulator, with the engine running, and the pressure jumped up to 40 pounds immeadiately. I'm still suspecting the fuel delivery system though because when the engine wouldn't start there was no fuel pressure. By the way, I never could hear if the fuel pump was running or not.
Next, with the engine running, I pulled and replaced the fuel pump fuse and watched the pressure at the same time. Four out of five times, the pressure would bounce back to 32 pounds in about 1 second. But sometimes the pressure would drop down to 5-10 pounds and hold until the engine almost stalled before coming back up to 32 pounds. Ah ha! It's time for a new fuel pump. NAPA's website can cross reference AutoZone's part number (E3270). The best replacement would have been NAPA part DFPFE0111 at $111.04 but AutoZone's pump is close enough. (E3270 is the same pump that's in a 94-96 Chevy Caprice with a 350 V8 at $87.11)
When replacing the pump, you'll also need to replace the flexible fuel line going from the pump to the sending unit with a 5/16" rubber high pressure hose. ($5.00) Details on where and how to replace the pump can be found in other posts. I've been long winded already.
Thanks to all and I hope my story may help someone else.
