Resistor pack connector actually had one pin, that clearly was corrected. All eight pins are now cleaned as well as the pack itself. Connector assembled with eight small drops of Vaseline oil.
Engine was not really cold, but it started well. Idle is improved and unfortunately also higher. AAV seems not to close properly, as I was unable to reduce idle speed.
Anyway, engine now runs better than ever in my ownership. Happy days.

 

Seems like corroded/dirty resistor pack pins are coming up in conversation more and more often. Cleaning them should probably be added to the list of "XJS usual faults and fixes" along with the old standards: crumbly throttle bushings, seized distributor advance mechanisms, dreaded shielded wire, etc.

Cheers
DD

 

Are these replaceable? I can't seem to find any online, I have 3 obviously used ones in a box here.

 

Google "DAC2044 Jaguar"

Looks like they're NLA from Jaguar but some new ones might be floating around still.


Cheers
DD

 

I'm having a hard time finding the plug that connects to the resistor pack. Any info here for a source?

 

You want the plug itself or you want to know the location of it?

 

There are no moving parts in them or chips to go wrong, and they can be opened up easily to be cleaned/checked. As far as I can see there is no reason a different connector could not be fitted, with a little fettling and decent soldering skills.
Greg

 

WE do have a sticky on this topic (very well written!), but it is under the heading "VIN related tools" and the link reads such that what it is about is a mystery. Perhaps (Mr Super Mod) re-doing the titles in this section would be a good plan?
Greg

 

Is there a smart way to change the butterfly axle bushing ?
Or is it just to remove the support plate and whatever is included in that assembly?

 

Lots of short cuts out there Leo, but I have always done them the proper way, and repeated at about the 5 year mark.

The main reason they fall apart is heat, so if you keep the cooling system under control, the whole engine bay is happier.

 

I moved on, and it turned out to be not as hard as it looked. Lower half of the bush fell into the darkness of the engine bay...

 

Im looking for a new plug that I can use in a new harness.

 

Brass bushing mounted at B-bank butterfly axle and pushrod adjusted.
Car drives well, but idle is too high, around 1050 RPM warm in N and of course hunting while cold.

I guess first step in AAV fault finding is to block the hole feeding the AAV to see if idle still is high ?

The 3 Torx screws holding the end cover on the inlet manifold had a funny drive size in my opinion. T30 did undo and tighten them, but felt like a too loose fit. T40 is a lot larger. I didn't try it, but I don't think a T40 bolt can be turned by a T30 tool. Did Jaguar invent their own sizes ?

 

No, standard sized Torx will fit. If you get stuck I will check the correct size.
Greg

 

Thanks. They are back in place, just didn't feel right. I guess a PO or mechanic has damaged the drive then

 

Fuel pressure measured. 30 PSI in idle, rising to 38 PSI when vacuum is disconnected. I guess this is ok ?


Here my noisy fuel pump. New hoses and pickup filter, clean tank, low fuel level.

 

Ignition amplifier can do all sorts of gremlin behavior if overheated over time.

Don't forget to always coat the top of the ignition amplifier (get a new gm quality one) with a layer of dialectic grease.
Yes remove condenser.
Check the wires for cracks and check the connectors for corrosion, damage etc.

If you are handy rebuild the thing while you are in there.
There are members who have completely rebuilt their entire amplifier and now have the performance and piece of mind a Jag owner deserves.

Search forums for details

 

Thanks. The car has been running quite well since I did the resistor connoctors, but I still need to use right foot a bit at cold start.
I have a to do list for the winter, and I better add amplifier rebuild to that

 

I would be curious to know your engine vacuum reading at idle. I am fighting a similar problem. Although I have a 92 with Marelli ignition. I have been hunting for vacuum leaks and just can't find any. Im planning to check the timing in case the crank pulls slipped. She's laid up for winter now but I will resume the hunt in a few months.

 

I've never measured my vacuum, but I will do it some day when I come by a gauge.

I still have slightly high idle and a a little missing in warm idle. It's perfectly drivable, it's just not perfect in idle...