Fuel Problem

[Kevin Kingan]

 Hi Guys;
I am having this problem with my 90Q (10v).
The problem is this.
The car runs fine (no problem starting,ect..)for say 10 mins or so But then
all of a sudden the engine will sputter, pop and run real bad. Its almost as
it was like it had a few bad plugs. It does this under any type of load and
at any RPM
 When I turn the motor off and restart it, all goes back to normal, for a
little while anyways then it starts up again.
 Before you guys say that its a clogg in the fuel delivery system. I have
installed a new fuel pump, filter, acumulator, FP lines, ect. I also
installed one of those see threw glass fuel filters(on the line before the
pump) so I can see if anything comes out from the tank. I have even cleaned
out the line that runs to the engine bay. All to no avail.
 Has anybody got any ideas?
Thanks all
Kevin

1988 90Q 2.3E Sport
1995 VW Jetta 2.0