right can any of you lot help me .i put my s2 rst on the rollers today to check and set the fueling .fresh built engine.standard .the co read about 3.5 on idle but when the engine is under load .ie on boost it read 0.at first i thought the fuel pump was knackered .but its got 6 bar of pressure on idle and when under load.i have changed the ecus and metering unit but still the same .any suggestions please as if i dont solve this problem i will have to do a restro on my car ,and i would like to see this year out at shows

 

ANY ONE

 

your idle co has nothing to do with boost fueling, there is a little box on side of metering head that when taken of(be careful when un doing it as fuel under pressure squirts out at first so have a rag handy) has a little flat headed screw in centre, remove this and under that is a tiny allen key head turn this clockwise to increase fuel under load. you have to turn it a little then re assemble to see results and repeat till desired level is attained, you should also use a wide band afr in stead to set fuel under load, co is really only used for idle levels and you could do with dropping that closer to 2 if poss. also when you adjust load fuelling you will have to re set idle after hope some of this helps, but if your not too sure get along to a good tuner cost you 100 and you can watch what they do for future

 

cheers mate .i will try this in the morning .i have tryed 3 metering units .but they might not be set right .like i said i will try this in the morning and re post