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200 Series General Forum for the Volvo 240 and 260 cars |
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weird effect of cleaning TBAViews : 761 Replies : 4Users Viewing This Thread : |
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Aug 29th, 2007, 20:16 | #1 |
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weird effect of cleaning TBA
Hi all ,
maybe someone can shed some light on this. Before cleaning out the TBA on my 88 240 glt it idled nicely around 900rpm. So this evening I decided ( and weather permitted) to throughly clean out the (1) lower assembly where the air duct feeds into . My god the amount of carbon residue was hard to believe. It literally had to be cleaned out in chunks. (2) Then I removed the bellows ( remembering Mike's tip about using tipex to mark the orientation of the bellows ) and it was the same scene on the actual TBA and butterfly. Large large amounts of black deposits. Anyways a large full can of Carb spray cleaner later and lots of cloths and all is nice and shiny again. I then removed the cold air mechanism from the airbox ( as per Ian's recommendation ) and fired up the car . Whoosh now idles at 1400rpm. I had to fully screw in the rpm adjuster screw to drop it to 900rpm. I checked the timing and its spot on . So I'am wondering have I seriously cleaned something too much or dislodged something within the CI Fuel system , as I had to fully screw home the adjuster ?. the car drives fine when I took it out for a long drive. any idea's regards brendan |
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