Seafoam..
This should be a sticky, because this stuff gets misused a lot...I found it on the full size chevy forum.
Here is an email about how to use sea foam when I inquired how to use the stuff from one of seafoam's sales rep.
If you are NOT completely knowledgeable of the processes professional technicians use to clean carbon out of the upper cylinders quickly, DO NOT ATTEMPT to, JUST PUT Sea Foam into the fuel tank and allow the cleaning of the upper cylinders to be done AS YOU DRIVE! One ounce per gallon of gasoline works best, for about 2 tanks of fuel. As Sea Foam itself can not cause any damage to your engine, improper application can!
If you are technically able, and knowledgeable:
Sea Foam distributes to all cylinders best when SLOWLY poured directly "down the throttle" of a TBI system (NOT EFI) or a carburetor, and with the engine at operating temperature and at IDLE, or slightly above, then shut down the engine and allow to "heat soak" for about 10 minutes MINIMUM, then drive aggressively until all carbon smoke clears. Do not attempt this if you have an EFI system with runner mounted injectors, or if you do not understand what you are doing!
Your other option is to find a vacuum line (like a pcv or brake booster) that feeds ALL CYLINDERS, and SLOWLY POUR your Sea Foam directly into that vacuum source with engine running and at full operating temperature. This line HAS TO BE as close to the throttle body as is possible. Install all product, then shut down, as above.
Do Not insert ANY vacuum line into the Sea Foam Product container to install Sea Foam, YOU WILL DAMAGE YOUR ENGINE when too much product enters your engine TOO QUICKLY!
Here is an email about how to use sea foam when I inquired how to use the stuff from one of seafoam's sales rep.
If you are NOT completely knowledgeable of the processes professional technicians use to clean carbon out of the upper cylinders quickly, DO NOT ATTEMPT to, JUST PUT Sea Foam into the fuel tank and allow the cleaning of the upper cylinders to be done AS YOU DRIVE! One ounce per gallon of gasoline works best, for about 2 tanks of fuel. As Sea Foam itself can not cause any damage to your engine, improper application can!
If you are technically able, and knowledgeable:
Sea Foam distributes to all cylinders best when SLOWLY poured directly "down the throttle" of a TBI system (NOT EFI) or a carburetor, and with the engine at operating temperature and at IDLE, or slightly above, then shut down the engine and allow to "heat soak" for about 10 minutes MINIMUM, then drive aggressively until all carbon smoke clears. Do not attempt this if you have an EFI system with runner mounted injectors, or if you do not understand what you are doing!
Your other option is to find a vacuum line (like a pcv or brake booster) that feeds ALL CYLINDERS, and SLOWLY POUR your Sea Foam directly into that vacuum source with engine running and at full operating temperature. This line HAS TO BE as close to the throttle body as is possible. Install all product, then shut down, as above.
Do Not insert ANY vacuum line into the Sea Foam Product container to install Sea Foam, YOU WILL DAMAGE YOUR ENGINE when too much product enters your engine TOO QUICKLY!
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