Search found 515 matches

by Tom W
Sun Jun 28, 2020 4:23 pm
Forum: Series 2
Topic: oscillating idle and lack of power
Replies: 23
Views: 1597
Great Britain

Re: oscillating idle and lack of power

Hi Peter, the tool you’re referring to is a set of feeler gauges. Your ignition map looks like you don’t have any vacuum advance programmed in yet. That shouldn’t be the cause of your problem though. Somethings not quite right if you need to set the floats differently to get the same fuel level. It ...
by Tom W
Sun Jun 28, 2020 10:07 am
Forum: Pub Chat
Topic: Eagle Lightweight GT
Replies: 23
Views: 1460
Great Britain

Re: Eagle Lightweight GT

I wonder how much of these limited edition Eagle cars came out of the Jaguar factory originally, or are even new manufactured parts to Jaguar specs? None of the major components, by the sound of how they’re all upgraded. I generally like the look of it, but the low angle photos they insist on using ...
by Tom W
Sat Jun 27, 2020 1:45 pm
Forum: Technical
Topic: Radiator fluid change.
Replies: 5
Views: 674
Great Britain

Re: Radiator fluid change.

Do you have a photo of your engine bay, so we can see whether you have the series 1 style or series 2 style of cooling system. The process is essentially the same for both though. There’s a drain point on the bottom of the radiator, and one on the LHS of the block, towards the back under the exhaust...
by Tom W
Fri Jun 26, 2020 6:44 pm
Forum: Series 2
Topic: STARTING CAR WITH FUEL SYSTEM COMPLETELY DRY...
Replies: 10
Views: 702
Great Britain

Re: STARTING CAR WITH FUEL SYSTEM COMPLETELY DRY...

The fuel pump is electric. If you turn the ignition on, the fuel pump will run and self prime the system. When it stops ticking, the float bowls are full.

However, if the car hasn’t been run in years, things may be gummed up. If the needle valves are not sealing, you’ll risk fuel overflowing.
by Tom W
Thu Jun 25, 2020 9:11 pm
Forum: Technical
Topic: 4000 rpm limit 123 distributor
Replies: 68
Views: 2339
Great Britain

Re: 4000 rpm limit 123 distributor

If it’s the slave cylinder that’s gone, it will have dumped all the fluid on the road. If it’s the master cylinder, it will either leak into the footwell, or fails internally so it just pumps fluid back and forth between the cylinder and reservoir. The flexi pipe from the reservoir can break up inte...
by Tom W
Thu Jun 25, 2020 7:48 pm
Forum: Technical
Topic: 4000 rpm limit 123 distributor
Replies: 68
Views: 2339
Great Britain

Re: 4000 rpm limit 123 distributor

Hi Grant,

The factory distributor curve is also in the electrical section of the genuine workshop manual.

Unfortunate about the clutch. Which cylinder has failed?
by Tom W
Thu Jun 25, 2020 7:26 pm
Forum: Technical
Topic: Does My Coil Look Big In This ?
Replies: 9
Views: 663
Great Britain

Re: Does My Coil Look Big In This ?

A couple of points to consider. Later cars have a mud shield in that area, which protects the air intake. It wasn’t on the early cars as built, but I think it was suggested as a potential retrofit by the factory. With the coil pack there, you won’t be able to fit it. Fitting the coil pack so low als...
by Tom W
Sun Jun 21, 2020 6:41 pm
Forum: Series 2
Topic: Front suspension set up problems... need help
Replies: 17
Views: 1186
Great Britain

Re: Front suspension set up problems... need help

Thank you, I really really appreciate your reply. The only thing I am doing different to what you suggest is that I am tightening the wishbone bushes with the car still in the air... will this make a difference?? Yes. The bushes should be tightened when the car is settled on its wheels. If they’re ...
by Tom W
Sun Jun 21, 2020 2:37 pm
Forum: Series 2
Topic: Front suspension set up problems... need help
Replies: 17
Views: 1186
Great Britain

Re: Front suspension set up problems... need help

Have you got the torsion bars on the correct sides? They’re handed, stamped on the front ends.
by Tom W
Sun Jun 21, 2020 2:34 pm
Forum: Technical
Topic: courtesy light switch near hinge
Replies: 11
Views: 622
Great Britain

Re: courtesy light switch near hinge

That hole looks too precise to be someone’s bodge. Is your car new enough to be of the era when US cars got a 2 way switch on the driver’s door? One pole turned the light on, and the other sounded a buzzer if the key were left in the ignition. Mine has that, the driver’s door switch is mounted on a ...
by Tom W
Tue Jun 16, 2020 11:51 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

That’s not ideal. The cap on mine is an allen head plug. I guess in the interim, any short section of bolt of the correct thread, or even some tape over the hole will suffice. You should be able to rotate the distributor 180 degrees so the access hole is facing outwards. It’s still awkward to get to...
by Tom W
Tue Jun 16, 2020 11:06 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

True, but it depends how you quote the curves. The different 123 manuals do it different ways, confusingly. It’s either: “With the LED set to X degrees, crankshaft advance is Y degrees at Z rpm. Or it’s: At X rpm, the advance is Y degrees beyond idle, at the crankshaft. The latter is closer to what ...
by Tom W
Tue Jun 16, 2020 9:34 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

The LED is irrelevant once you’ve got the car to run. It’s only really a marker to set the distributor to when you first fit it, as you can’t set the static advance in the conventional manner. It’s good practice to check what the timing actually is after fitting, and adjust as necessary by rotating ...
by Tom W
Tue Jun 16, 2020 8:55 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

Yes please, I’d be interested in seeing what the curves are.

Steve, the position of the pointer won’t give an error when measuring the total advance applied by the distributor. The same error would exist at idle and at maximum advance, so any error is cancelled out.
by Tom W
Tue Jun 16, 2020 6:55 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

Interesting. So from your tests with curve 0, your distributor has a maximum inbuilt advance beyond idle of 19-20 degrees measured at the crankshaft. The instructions show it should have either 22 degrees, or 24 degrees inbuilt advance, depending on which version of the instructions you believe. So ...
by Tom W
Mon Jun 15, 2020 8:13 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

Does your advance stop advancing at 3600 rpm then, with the vacuum disconnected?
by Tom W
Mon Jun 15, 2020 7:00 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

I heard the curves in the Jag 123 were based on those in Des Hammill’s book, which does include advance settings that go a lot higher. Not much use for those that want something standard. I don’t have an advance timing light, so I can’t check what mine does beyond idle as the timing marks on the dam...
by Tom W
Mon Jun 15, 2020 6:26 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

The numbers are all 10 degrees more, because the two tables are counting from a different point. The one I linked to assumes the distributor is set at 10 degrees static relative to the LED, which is actually 12 degrees at idle (2 degrees beyond the “static” point) The table you linked to is showing ...
by Tom W
Mon Jun 15, 2020 5:05 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

The way I interpret the 123 instructions is as follows. The figures in the instructions are crankshaft degrees without vacuum applied, and with the static point (LED) set to 10degrees. There’s a note that it says they’re with the vacuum disconnected. The vacuum applies up to an additional 10 degrees...
by Tom W
Mon Jun 15, 2020 4:14 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2869
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

The curves for the Jag version are in here. https://www.123ignitionshop.com/manuals/123JAG6.pdf They all start at 12 degrees, but that’s only 12 degrees if you set the distributor to 10 degrees static timing point as per the instructions. Setting the distributor to a different static point will alte...