1991 F40 will not rev.

I am working on a 1991 F40 (just over 10k miles on the car) that was parked last summer and we went to start it earlier this summer and it would not rev up. We checked some of the basics and found that the drivers exhaust is cold and passenger side is Hot after running for 2 min (seems to have a ok idle but when given throttle is is very lazy and will not rev). We pulled the spark plugs the passenger side is black and alittle fuel soaked the drivers side has a lot of fuel on them. We removed the inlet to the turbos and the impeller spins good on both sides. We removed the vac. line for the fuel psi regulators (one each side) and found there is a green crusty substance in side the vac line (same on both sides) is this somthing that was used at the factory? (we have the spark plugs out and did not check vac before pulling plugs).

Any help or ideas would be a great help. Thanks!