A co-worker of mine gave me a can of this stuff that he uses on the marine motors he works on at his shop. It's a spray, like carb cleaner from Mercury. Made for 2 and 4 stroke outboard motors.
You spray it through all your vacum lines while the motor is running, then you spray the rest directly into the throttle body until the motor stalls out.
Keep spraying the rest of the can even after the engine stalls.
Let it sit for 15 to 20 minutes, then start up the motor.
I was amazed at the amoutn of crap that came out of the pipes. The bronc' runs ALOT smoother now, and seems to have recovered some of the HP it's lost through the years.
(I even got the 32's to squal on the garage skirt)
=D>
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