Hope some one can give me advice

When I start the car and try to pull off. The engine is starved of fuel for a second here and there which makes for a very jerky first five minutes of any journey.

As soon as the engine is very warm and I take it over 3,000 rpm no problem. Drives wonderfully.

When I stop again and the engine has cooled for a little, but the temp gauge still has a healthy warmish reading I still get the same problem.

Two things spring to mind
1. ECU - The Automatic Choke
2. The fuel I am using

My car is WRX MY94
HKS Dump Valve and Air Filter along with RS exhaust system
(Based in Brighton but takes regular vists to Horsham and East Kent)

I only put super unleaded in the tank? I have put a few tanks of Optimax in around about the time the problem started

Would a fuel additive help? to get it closer to the 100RON they use in Japan and which I assume the ECU is set up for?

Any ideas gratefully received

Thanks
Steve

 

Problem solved

Re set the ECU and chucked Redex in the tank.

Steve