azsubaru Posted December 21, 2006 Share Posted December 21, 2006 My SPFI EA82 just failed emissions (hydrocarbons). It has a regular miss and fails the dollar bill test at the tail pipe. No CEL. New plugs, wires, disty cap, rotor, and fuel pump. Compression at cylinders 2,3, and 4 is about 180. Cylinder 1 is 167. Does that sound like a burnt valve on # 1? Any ideas or suggestions are welcome. Link to comment Share on other sites More sharing options...
NoahDL88 Posted December 21, 2006 Share Posted December 21, 2006 Could just be a dirty valve, a bad valve would give you no compression. Try some seafoam through a vacuum line, if theres carbon in there it will absorb fuel and make your HC's go up. Link to comment Share on other sites More sharing options...
skishop69 Posted December 21, 2006 Share Posted December 21, 2006 I agree. A dirty valve or a bad vave guide could cause that. Hook up a vacuum guage and watch it at idle. If it bounces instead of reading steady, bad valve guide. Along with the Seafoam, try a can of BG 44K. It's the best additive out there for reducing/removing carbon. Link to comment Share on other sites More sharing options...
azsubaru Posted December 21, 2006 Author Share Posted December 21, 2006 Thaks, guys Seafoam is easily obtained , but I'm not familiar with BG 44K - where can you get it? Link to comment Share on other sites More sharing options...
skishop69 Posted December 22, 2006 Share Posted December 22, 2006 Thaks, guys Seafoam is easily obtained , but I'm not familiar with BG 44K - where can you get it? NAPA or AutoZone. 12oz can, gold and silver. Link to comment Share on other sites More sharing options...
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