stagefumer11 Posted April 9, 2004 Share Posted April 9, 2004 i have a 1985 r30 skyline with a l20et. 10-12ps i of boost Fmic. ( small one) 3" pod filter on a 90deg bend. 2.5" exhasut. Factory timing. now this is a weird problem. well maybe easy for some of you 's. as i reach say 4500-5000rpm. car is pulling fine, i hit a point where the car stops pulling. and then lets out a huge backfire. not a bang but a boom. and also does it out the intake. it will do it in any gear aprt from 1st. and this has only accored in the past week. : / "confused" ? Quote Link to comment Share on other sites More sharing options...
philiow313 Posted April 11, 2004 Share Posted April 11, 2004 you said "factory timing" but are you sure its still at that? worked on a dodge caravan that did ALMOST the same thing, turned out the timing was off. Quote Link to comment Share on other sites More sharing options...
stagefumer11 Posted April 11, 2004 Author Share Posted April 11, 2004 yeah well. confurmed the timing for the thing was factory 10btc. regaped the plugs and tryed again and toolk off the bleed valve. which kept giving me 15psi spike, but anyway. 6psi. regaped plugs. and a new coil. when excelarating no miss but when crusing it missed like a bitch. and at idel. i pulled the timing to 20btc and it does go alot better. alot more power down low. and doesnt ping. temped to ruun the 15psi again . but.. ITS MISSES!!! Quote Link to comment Share on other sites More sharing options...
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