“Lisa & Jeb Boyd” <@Lisa_Jeb_Boyd>
It helps clean the intake tract and the valve stem areas in a
sort of shock mode. You get the same effect over time by dousing the fuel
supply, but the “shock” cleaning has on numerous occasions straightened out
bad idle problems and restored some of the “snap” that precipitated the need
for it to begin with. I am fortunate to have a spiffy little cap and valve
mechanism that allows me to meter it carefully without fear of stalling the
car while it runs through. GM’s top engine cleaner works on the basis of
admitting large quantitys of cleaner into the engine specifically to stall
it. Then you let it sit for a half hour and run the thing down the road to
clean it out the rest of the way.
BTW, NEVER do this inside a building! It stinks something awful,
and I’m sure breathing the stuff in close quarters is hazardous.
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