m1ghtymaxXx Posted May 3, 2007 Share Posted May 3, 2007 My 83 zx is running quite rich, when i pulled the plugs they were coverd in black soot, the exhaust is very "dense" and smells very strong, and my buddy even commented on the smell driving behind me. The CEL isn't on, and the car runs pretty well, however the the revs do waver, and the the car shakes occasionally on start up (particularily when its hot). Where should i begin to look? ps: my airfilter is a little dirty, but that wouldn't change afr's would it? Quote Link to comment Share on other sites More sharing options...
Guest Hyksos Posted May 5, 2007 Share Posted May 5, 2007 One thing to check is the fuel pressure you have ... my 83 280zxt had a broken fuel pressure regulator, fuel pressure was about twice what it should be, the car was not even able to idle because of too much gas injected hehe! Quote Link to comment Share on other sites More sharing options...
m1ghtymaxXx Posted May 6, 2007 Author Share Posted May 6, 2007 well its idles and runs fine. Would worn injectors a crappy spray pattern maybe cause it? Quote Link to comment Share on other sites More sharing options...
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