LUCAS P DIGITAL

xxalexx at ix.netcom.com xxalexx at ix.netcom.com
Tue Apr 27 00:58:14 GMT 1999


> I worked on the externals on the European XJS  high compression lean
> burn "Ed May Fireball Head?"
> 
> What did you actually do to the head?
> I have heard that porting and polishing these heads is not really
> worthwhile.
> 
I met to say the car had this head in describing the model,
I did nothing to the head

> I could richen the mixture by inserting a t-bleed needle valve in the trunk
> vaccum line.  Very clean
> combustion, and good metering got it to pass federal emissions with no o2
> sensors.
> 
> That was no mean feat:-) I am in the Middle East so emissions are not a
> problem, I would like to have more control over this system though.
> 
> Adjustments to TPS seemed to do nothing.
> 
> Funny you should mention that! I need to replace the Throttle pot, the Jag
> item is deadly in price, any suggestions for a workable alternative?
> 
It has been over 10 yrs since I worked on one, we tried increasing 
the range of pot adjustment.  You  could measure resistance and hook 
up a some other pot.  Maybe American car or even Rad Shack.   
alex



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