Hi hope someone can give me a heads up. Have a HPI firestorm nitro not had it running for at least 12 months so dusted it off checked all set up is ok everything seems to be working but I cannot prime it! Fuel tanks full air filter clear covered exhaust and pull and nothing......not a drip going into feeder tube I did not lost one of my manifold screws but surely should still be able to prime just to turn it over, any ideas thanks