I found these instructions at
http://www.bluemoongear.com/JeffSeaFoam.htm...
(As posted by a third party)...
The first 1/3 of the can goes directly into the engine’s induction system to clean the induction system. On a hot, running engine, you tach it up and insert the treatment through the carb, or in this case the brake booster’s vacuum line (it is fuel injected), "until it stalls", then turn the key off. After 5 minutes, and in a WELL VENTILATED area, fire it up. Don’t be surprised by the large, thick cloud of deposits (the Probe yielded one 20’deep by 3 acre square, smoke screen). The next 1/3 of the can goes into the crank case to clean the bottom end. Interestingly though, you needn’t immediately change the oil & filter like other treatments!, Before we used the treatment, the engine sounded like it had sticky lifters (not likely with OHC) and excessive lash (adjusted & double checked). Not 5 minutes after the Seafoam was introduced to the crank case, the engine was silenced enough that the injectors were the only significant noise source. The last 1/3 of the can went into the fuel tank to clean the injectors and fuel system. Immediately noticeable was improved responsiveness and a smooth idle. A quick look at the oxygen sensor’s output signal revealed a renewed, fuel efficient idle (14.7:1 Air/Fuel ratio, known as the stoichiometric ratio, produces 0.45VDC, and is measurable with a high impedance analog volt meter. In general, on an oxygen sensor equipped engine, idling at operating temperature, a frequent, periodic crossing of the Stoichiometric threshold, or rise & fall, above and below 0.45 VDC indicates functionality of the feed-back fuel metering systems at idle).
