danperrett

Hi all I have been having an issue with the running of my MGF for the last couple of weeks and I haven't managed to get to the bottom of it.
The car starts and idles OK, but as soon as I give it even a little throttle it coughs, splutters then back fires if I hold it down. and makes it un-drivable,
but then in idle it sound very sweet.

I have changes a few things some for new of Ebay some I had spares lying around.
New HT leads.
New dizzy cap and Rotor
new crank sensor, great pain to replace.
replaces the coil with an old one I had lying around.
pulled all the plugs they were all sooty as you'd expect from something miss firing, I cleaned them and put the same ones back.
replaced the throttle sensor with a spare I had lying around.
Checked the Cam belt timing, broke the cam belt cover in the process, every thing seems to line up although I do need a new cam belt as this one appears to be cracking.
pulled the air filter of the throttle body squirted carb cleaner into it, still no good.
Don't think its a blocked breather tube as I pulled one with no difference.

Its leaving me scratching my head wondering what the hell is going on with it.

Anyone experience anything like this before? Could it be a wiring issue? Fuel Issue?

Cheers.
Dan