Hello I have a 1992 bluebird bus with a 1st gen 5.9 with the p7100 injection pump. I purchased this bus the way it is. I drove it home and this thing is gutless. It takes off fine but any slight incline it starts lossing mph. On the interstate it will not get out of its own way,will only get up to 60. I have changed the fuel filters and air filter also looked for broken lines on the engine and injection pump. Anywhere to start looking? No i dont have a boost guage but you can hear the turbo spooling up nicely. Thanks for looking.....

 

With a p-pump you may get more help in the 2nd gen 12v section. Our 1st gens have the VE pump.