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So heres whats happening.
This misfire problem seems to come and go, but is almost always there. My gtr is misfiring above 4500 rpm, and only when its under boost. Its almost like a hesitation, it pops, sometimes violently, sometimes barely at all. I am running rebuilt stock turbos with steel exhaust wheels. I do not have a boost controller installed, just the factory boost restrictor removed. I have mishimoto slim fans, 3'' cat back exhaust, and apexi intakes. Running 10w40 royal purple oil, and always gets 91 octane fuel, or husky 94 when Im near one.
This problem goes away when i retard the CAS... So im leaning towards coil packs or the ignitor. Engine is timed to 20 degrees btdc. I have a box in the trunk with 6 injectors and a bill for injector servicing from previous owner, im assuming the ones in the box are the old ones. I pulled the mafs apart and re soldered a while ago, that fixed limp mode problem. Havent changed plugs in a while, gonna do them this week. Which plugs should I go with ?
Where should I start with diagnosing this problem ? damn misfire.
This misfire problem seems to come and go, but is almost always there. My gtr is misfiring above 4500 rpm, and only when its under boost. Its almost like a hesitation, it pops, sometimes violently, sometimes barely at all. I am running rebuilt stock turbos with steel exhaust wheels. I do not have a boost controller installed, just the factory boost restrictor removed. I have mishimoto slim fans, 3'' cat back exhaust, and apexi intakes. Running 10w40 royal purple oil, and always gets 91 octane fuel, or husky 94 when Im near one.
This problem goes away when i retard the CAS... So im leaning towards coil packs or the ignitor. Engine is timed to 20 degrees btdc. I have a box in the trunk with 6 injectors and a bill for injector servicing from previous owner, im assuming the ones in the box are the old ones. I pulled the mafs apart and re soldered a while ago, that fixed limp mode problem. Havent changed plugs in a while, gonna do them this week. Which plugs should I go with ?
Where should I start with diagnosing this problem ? damn misfire.
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