Right - here we go again.
First off I checked the fuel pump was delivering - 10 seconds or so of cranking resulted in a consistent squirt of petrol so I think this is ok.
Re-adjusted the float levels to 15mm with 25mm of droop - no change.
I sprayed WD40 around the vacuum take-off for the servo and the headlights (thanks Bill) but there was no variation in engine speed so I don't think I have a vacuum leak, also I would have thought the plugs would show this as a lean running condition?
Then I went to see Brian, who is a complete star, and fitted his carbs. Still exactly the same problem. We then bypassed the ignition with a wire from the solenoid to the coil - still no change. I think Brian was more disappointed than I was (!) but at least we have ruled out the carbs. Thanks again Brian, you were a massive help.
Today, after I had fixed the door lock which had locked me out of the car on Saturday
, I changed the wire from the distributor to the coil but this didn't help. I even disconnected the breather from the airbox but this didn't help either.
It is still temperature related - whilst cool I managed to pull to the red line with a bit of stuttering but when hot it cut out at 5500 again. It seems that the hotter it gets the less revs I have as I was stuck in traffic on the second run and when I got some open road it gave up at 5000 but after cruising a bit and the temp dropped it pulled 5500 but no more. Before it stops revving there are a couple of stutters/hesitations then it hits what feels like a rev limiter.
The only other thing I can think to try is putting the old, leaky fuel pump on but both Brian and myself are unconvinced this is a problem.
Otherwise I guess I'll have to call in the expensive cavalry and either go back to Aldon and get them to analyse the ignition system or maybe I should give it to Paul Matty and say fix it please..
Can anyone advise on the next course of action because I'm now officially stumped and can see big bill looming which I can ill afford?
As ever, thanks for all the help and advice.
Cheers
Robbie