1977 Jaguar XJ12 fuel pump installation

79,000 MILES • V12 • 2WD • AUTOMATIC
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BMSHAKEEM
  • MEMBER
  • 1 POST
On my Jaguar XJ12L I had to depressurize the fuel pump by disconnecting the 85 terminal of the fuel pump relay(I disconnected the hot lead to the fuel pump instead) and the ignition ciol wire lead, then turning over the starter for a few seconds. After installation of the replacement fuel pump(which I was assured it is good), I reconnected coil wire and turned starter over but car would not fire and start running. I even tried depressurizing again, this time with the 85 fuel pump relay terminal wire and ignition coil wire. Car still would not start. Did I leave a step out? How can I remedy this? Before pump swap, the car started every time.
Dec 24, 2008 at 4:48 AM
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DAVE H
  • ✓Experienced Mechanic
  • 13,383 POSTS
check for power at pump .. is power supply is present at cranking .. then pump is bad
Jan 5, 2010 at 8:12 PM
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