5S-FE MK2 Non-Turbo Engine 1993 Mult.Problems (runs rough and overheats) [Archive] - Toyota MR2 Message Board

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I think this has multiple issues. Problem started on their own before any changes. At start very rough idle, engine seems to run smoother as rpm increase but with a noticeable miss and temp gauge goes to max after about 5 mins driving. Brand new header, downpipe (old downpipe was rusted thru) I mention this because after first run the two most left pipes (from rear facing forward) show temp discolor two right still shinny.This may be normal since we only ran it for 10 mins.New plugs, dist.,