5500 rpm car misfire at 550hp
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Cars still at shop. Car made 550hp 515 tq and at 5500 rPms start to break up and misfire. Changed and gaped the plugs one step colder and no change. Running e85 850 cc injectors aeromotive 34O pump cjm stage 2 return system. Osiris tuned gt maf sensor gt35r turbo powerlab kit
Last edited by zach711f; 04-28-2012 at 07:18 PM.
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what's the gap?
I'm not sure what people think heat range does for misfires but going 1 step colder won't stop a misfire.
Sounds like it could be spark blow out. I would gap the plugs down to .030 first and try that. If not i would look into there being an issue on that load cell in the map. maybe a disturbance in the airflow across the maf at that specific rpm
I'm not sure what people think heat range does for misfires but going 1 step colder won't stop a misfire.
Sounds like it could be spark blow out. I would gap the plugs down to .030 first and try that. If not i would look into there being an issue on that load cell in the map. maybe a disturbance in the airflow across the maf at that specific rpm
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wow, completely missed the fuel thing. I was thinking this was a misfire only at that rpm and it cleans up.
mid 500 hp is where i calculated the 340 to run out of fuel on an e85 tune when someone else was asking. I would be a little scared if it's just running out of fuel and the tuner didn't notice this though.
edit: i see why i missed the fuel thing. He added it after my post.
mid 500 hp is where i calculated the 340 to run out of fuel on an e85 tune when someone else was asking. I would be a little scared if it's just running out of fuel and the tuner didn't notice this though.
edit: i see why i missed the fuel thing. He added it after my post.
Last edited by binder; 04-30-2012 at 08:15 AM.
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Nobody needs to believe me because I'm a know-nothing... but I'm celebrating inside a little bit because if it is in fact E85 taxing that pump and those injectors it means you are all TEACHING me something because I had that one nailed.
So maybe I'm boasting a bit- but boasting on YOUR behalf! I think it's finally starting to make a little bit of sense.
Sorry- just sayin'
So maybe I'm boasting a bit- but boasting on YOUR behalf! I think it's finally starting to make a little bit of sense.
Sorry- just sayin'