The fuel PX indicated is not an indication of fuel flow but rather an indication of lack of fuel flow !.. .. .The carb float valve controls the fuel flow by opening on demand when this happens then the fuel PX will drop and as it closes the fuel PX will rise so low RPM=low demand= high fuel PX at high RPM the float valve will be slightly open allmost all the time so the fuel PX will be lower.. .. .In short if you have positive fuel PX at max RPM . .then you are OK.. .. .Most of ST,s comments are based on the Bendix RS injection system ( and for that system are true)but this is a totaly different system.. . . . <small>[ 07 March 2002, 10:21: Message edited by: A and C ]</small>