Cheap and easy knock reduction
Greeting Everyone, I'm new here and recently have been reading various parts of this forum. I noticed the hot topic here is Knock Retard ~ no pun intended.
I have not read anything about the glowing carbon particals in everyones combustion chamber, so here is a quick, cheap and easy way to give the inside of your engine a bath.
There are many ways and treatments available, but the most effective one I've ever used is GM'* "Top Engine Cleaner". Get it from your local GM dealership ~ costs around $10.
To use: Start your engines! Find an intake manifold vacuum hose (ex. fuel pressure regulator hose on the fuel rail). Raise the idle slightly to avoid stalling. Put the vacuum hose into the can of top engine cleaner and let the engine draw in the entire contents of the can.
Immediatly turn off the engine and let the cleaner soak in for a minimum of a half hour. If you can let it sit for 2 hours or more, you'll be doing yourself a favor, and an overnight soak would reap the best results.
When your ready to start the engine, make sure your not in a garage! Start, raise the RPM'*, and blow all that pesky garbage out. Enjoy the white billowing smoke that follows and pray for the ozone layer while your there.
This will clean the intake, valves, pistons....
Don't forget to service your throttle plates, esp if your pedal gas pedal sticks a little (happens more than you may think). And the IAC restricts with build up too. Might as well clean your EGR pintle while your in the mood.
Top engine cleaner also works great for cleaning injector fuel deposits. Use 10% cleaner and the rest gas on the newer multi tech fuel injectors. This is a max mixture and anymore will cause a stall and no restart until removed and system cleared. If you do clean your injectors, remove the fuel pump relay or unplug the pump and block off the fuel pressure regulator when cleaning.
I have seen decent performance gains after servicing injectors. This is a good idea for those of you with higher mileage/ older cars.