XJ XJ12 ( X305 ) 1995 - 1997

96 xj12 engine hesitates

 
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Old 02-12-2019, 09:24 AM
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Default 96 xj12 engine hesitates

Hello , anyone know why the v12 which was running great suddenly started to hesitate and lurch ,seconds after I got engine light and transmission light along with abs and traction control lights ,I took it to the shop however they canít get to it for 2 weeks.
 
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Old 02-20-2019, 12:45 AM
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Flex, any progress with your XJ12?

Were you able to read engine codes, if any? Sounds like something failed suddenly. Perhaps an ignition coil pack or a MAP sensor. Those failures should set a code. Also, gasoline contaminated with water will cause symptoms like that in any engine.

In my experience, the X305 XJ12 air, fuel and ignition systems are quite reliable. There are two fuel pumps, and the car will still run normally if either one of them fails, except when fuel demand is high. Yes, it's a Jaguar V12 so fuel demand is always high, but I mean when your foot is deep in the throttle.

I saw you had trouble with your battery too. A correct and healthy battery is absolutely essential, so that must be settled first.

Hope to hear from you. Sorry, there is not much traffic in this section with only a couple thousand of these cars scattered across the entire world! Glad to see another here.
 

Last edited by SleekJag12; 02-20-2019 at 12:50 AM. Reason: Added emotion
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Old 02-20-2019, 05:32 AM
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Default Xj12

thanks for the info I actually dropped it off a Jaguar to have them look at it hope to hear something soon Iíll let you know what they find.

thanks Joe
 
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Old 02-21-2019, 12:07 AM
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Ok please do, Don't be surprised if they come up with a long list of needs, some needs more important than others. And be aware that they might not even have a V12 technician anymore. Maybe there's an old timer still around? Hopefully they can come up with a sensible solution without quoting you a fortune. Most of the work on the V12 can be accomplished by the home mechanic, following the factory service manuals. But don't mention that! Good luck.
 
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Old 02-22-2019, 09:42 PM
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The common item in the 4 lights is the left rear speed sensor , it is also your speedometer on the X300 series

All 4 wheel speed sensors are inductance sensor that have the same between the 4 wheel positions fundamental integrity reading of 1300 ohms , so if one wire pair is different you have a find

The functional signal that comes out is a sine wave that has a count per time

The most common fix on the sensors is cleaning the sensor face is fragile and break in removing from the hub

The sensor part numbers are different for the VIN and position

https://www.jaguarclassicparts.com/u...braking-system

 

Last edited by Lady Penelope; 02-22-2019 at 10:18 PM.
 
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