Oven cleaner spray, remove the rubber seals & the MAP sensor, spray all the can of oven cleaner into the ports leave for at least 3-4 hours then jet wash out all the muck.
Engine degreaser is also very good same as above spray liberally let the solution do it's work then jet wash out all the gunk, repeat if you have to, I always have at least 3 ready for our meets through out the year.
|