has anyone removed and cleaned their combi valves? any tips for this?
i replaced my SAI pump (original one would not kick on during cold starts, bought a used one and sounded like a high pitched hair dryer so i rebuilt but still didnt work, and finally bought a good one from a junk yard) and cleared the codes (SAI system - insufficient flow banks 1 and 2) and within 2 or 3 cold start ups, the CEL came back on. Im assuming the combi valves are either clogged or need to be replaced. any tips on how to actually remove/clean them? once they are out, i saw one person used carb cleaner but not really sure how. im guessing just spray a bunch in and try to work it around to clear all the soot out. just want to make sure i dont do anything to damage the valve.