You guys have been a great help so far. Thanks.
I have spent a industrious day under my 740's bonnett today. I checked and cleaned all the breather pipes, vac pipes, filters and fuses. With bated breath I struck up the beast and......
No change. I have been playing with trying different throttle applying. I have got this:
Starting is not a problem. Idling is not a problem light throttle is not a problem unless engine is cold mid throttle seems fine although can vary When I floor it, the revs stick at 3,500 Backing off the throttle lets it rev through.
Now thanks to your replies I now know how the k jet system works. Now using that knowledge. Would I be correct in thinking that with the throttle flat to the floor the throttle flap ((excuse the technical terms) the one in above the large rubber bellows/pipe that is attached to the fuel control unit.) Would be fully open, thus creating more vacuum blah, blah, blah! Then as you back off the flap closes. So as my car will run okay at half throttle (being able to rev to 5/5,500rpm) could the car be gaining to much air? I am not dismissing the LACK of fuel completely but because the car will rev so high I have to wonder how? if fuel is not present.
If I am correct of which I doubt. Would the air control valve be at fault? If so how could I test it? I did unplug it whilst the car was running and it made NO difference to the running at all.
Or could it be the coil breaking down and not giving sufficiant spark under load?
My list of possible problems grows smaller and your assistance is greatfully recieved.
For reference I live in the UK in Leicestershire East Midlands I use fake e-mail address because of the Kindly SPAMMERS But if you wish to e-mail me just remove the ***nospam***
Thanks again.
Thanks Stewart your input has been invaluable and indeed you are quicker than the Royal Mail. Unless your newserver is NTL then Royal Mail could be construed as quicker!
***nospam***Kiefels@***nospam***hotmail.com