1986 Jaguar XJS air intake

I recently purchased this car, it was in storage for approx. 5 yrs, it has a new fuel filter, I drained all of the old gas out of it, put new fuel lines and plugs in. It fires up and runs perfectly at idle. It bogs down at 3000 rpm's. The left side of the motor is sucking air perfectly. The right side of the motor is not drawing any air at all thru the inlet. Both of the exhaust pipes are blowing good at about the same pressure. The air filters are good. I checked them first thing.