• Tiny
  • brucie
  • 1993 Jaguar XJS

Electrical problem
1993 6 cyl Two Wheel Drive Automatic 120000 miles


i've owned this car since 60000 and have never had an issue I couldn't diagnose and ulltimately repair.

this time, though. I am stumped. What i've done thus far is determined that the fuel pump runs when its supposed to and the rail is full and pressurized.

spark is present but weak (yellow and thready). I've replaced the amplifier--no change; then I changed the crank position sensor. While i've changed the coil, resistance across the primary and secondary windihgs apperar normal.

what else could it be?

at the end of my rope in Austin, TX

thanks in advance!

Sunday, August 17th, 2008 AT 7:35 PM

1 Answer

  • Tiny
  • Dave H
  • Expert
  • 13,547 posts

Ignition pulses are applied from a separate ignition amplifier to the ignition coil. The ignition coil generates high energy pulses for the spark plugs. The distributor does not have centrifugal or vacuum advance mechanisms. The distributor is only necessary to distribute spark to the proper cylinder.

Replace cap and rotor !

Was this
Sunday, January 10th, 2010 AT 6:20 AM

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