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Change the needle and seat, and the accelerator pump piston. The carburettor turns into something completely different. The engine idled like it had a lumpy cam . . .

Air horn off (again). The float level was still too high. I lowered it a couple of millimetres, which seemed to help. I pulled the ...

Well, that was easy [\sarcasm].

The needle and seat was an easy replacement. The old one has a Viton-tipped needle, which had a tear in it. That'd explain why it would get stuck closed. The NOS replacement is the correct AF size (9/16" instead of, I guess 15 mm), but the float level was way off. I ...

I "ensmallened" the hole in the accelerator pump pull rod with a nail punch and carefully worked it up with a round needle file until the link just went through the hole. No more lost motion in the accelerator pump.

And now I've made the FC run better with Steve's carburettor than with its own. No ...

Update:

Carburettor runs well on my FC. Mind you, the FC is somewhat "flat-spotty" off-idle anyway. I can fix that with a 52 main jet . . .

On the dippy, up'n'down streets in West Pymble, I notice a bit of hesitation just when I feed in throttle to go up the hills. Tomorrow (all things going well ...

(raises hand)

Distributors and voltage regulator, please. Shall I pm you with my address?

Rob

AI couldn't write it any better.
No, wait . . .

Rob

Executive Summary: I fixed it.

TLDR -

I took the air horn off, and even though the power valve vacuum piston wasn't stuck, I decided to take it out and check the vacuum passage. Yeesh. I thought I would break the piston assembly taking it out, or rip the threads out of the air horn. It was tight ...

I've never heard a grey motor ping. No, the full-throttle conditions were about 35 mph in second gear uphill on a nearby street, so about 3000 rpm. Same symptoms occurred, but less noticeably, on WOT at 30 mph on the level in top.

I suppose it's not unknown for the vacuum piston to stick in the "up ...

I put Steve's carburettor on my FC. A normally straightforward task ended up taking over an hour. You know the nut under the idle mixture screw? I dropped it trying to put it on. It didn't reach ground level. After a lot of work with a torch and fingers, followed by a magnet-on-a-stick, I located it ...

Here is what the Interstate Stromberg Fettling Service found -

1. The fast idle rod was in the wrong hole in the choke lever. My bad from when I was in Queensland.
2. The throttle was sticky. The throttle valve was off-centre in the bore. I separated the throttle body, loosened the throttle shaft ...

A box appeared at the front door today. Size, weight and sender suggest it's a BXOV-1.

Rob

Strewth. That looks very much like what I did with my FC sedan, except that I modified an HT rear shock absorber upper mount member to suit.

From memory, the distance between centres of the mounting holes is 425 mm. The shocks lean inwards at about 45 degrees, and the mounting holes are about 50 mm ...

I am sceptical. The diesel fuel would flush remnant oil out of the crankcase. But a fumy engine is caused by worn cylinder bores and piston rings. And I think diesel fuel is a poor lubricant, so I'd be unhappy about running the engine for any length of time with diesel fuel in place of oil.

Rob

Steve,

Bit by bit. My cars tend to surge and misfire at high speeds (say above 75 mph). My current thinking on this is that there's too much ignition advance at high engine speeds. So if you don't mind running a couple of tests for me:

- Disconnect the vacuum advance pipe at the distributor and ...

The rear shock/lower spring mounting plates aren't on quite right. They need to be turned over so the shock absorber mounting stud is at the forward, inside corner and pointing forwards. And it would probably be a good idea to put a rear spring rubber and retainer between the rear spring and the ...