BIG BANG

I was fairly ragging it home the other night on the motorway and all of a sudden I lost most of my power. I had about 1/3 use of accelerator travel and then after that the engine would choke. The more acclerator pedal I gave it the more I would slow. I could not bring her above 70. This has happened once before but it cleared up.

I also experianced a big bang when at a junction. Not a usual backfire pop but a bloody great BANG. It was so load it sounded like it was inside. As I have no back seats or carpet in at the moment I am just wonder if it was a backfire somewhere i the mid exhaust section. The girl that shares a lift to work with me was bricking herself.  

Had my timing set up last weekend so I am ruleing that out.
I am guessing its a fuel pressure problem but I am open to suggestions.
Was going to change all fuel filters see if that helps. Maybe clean out the tank and run some injector cleaner through.

More jobs to do this weekend! But with-out doubt the first on my list is to put a new alternator belt on. The squeel is possible the most annoying sound in the world!!!     Who agrees?

First thought is that there is too much fuel going into the engine - loss of power can result from an over-rich mixture.
Raw fuel igniting in the exhaust is a backfire (for anyone who didn't know), so this might fit in with excessive fuel supply…

However, a weak spark might mean unburnt fuel, so check the coil and HT leads too (a dying coil can lead to weak spark, as the coil cannot keep up with the work required of it, at higher speeds)

Not really sure what the exact cause might be, but it might be worth getting a Bosch agent to look at it, if you think that it's the fuel side, or you can check the resistance of the coil with a Multimeter and Haynes manual.

Anyone else got any ideas?

Odd - I've seen this thread before!