hi im having a prob since i got allmost to my friends house to drop him off from the track last night first time i took it ther but it was idleing at around 500 rpm witch is low my ecu is set to idle at 900 that was intermittint ,sorry for my spelling,the big prob now is it idles fine revs fine idleing when i put in first and start to go over id say 2k rpm it starts bucking me back and forth like its losing fuel just put in a new deutsche werks fuel pump 340l in day befor track to replace my ebay one, worked fine all night raceing untill last pass it started hesitaiting after i would shift for a split second then would be fine keep in mind car is at a half tank gas my old ebay pump the filter was small so i couldent let it get below that or i would start running out of fuel new pump filter is oem size so i dont think this is the prob keep in mind im running on e85 do u think its the fuel filter clogged? ive checked for leakes at injectors, pump and filter nothing, could this be my dizzy? its a bone stock b18b just with a ebay turbo kit , 750cc 12 ohm injectors high flow feul rail ebay fpr, and stage 3 clutch making 240 whp on 11 pounds e85 dyno tuned at abel raceing.i had to leave it at his house last nigth till today im going back to fix were should i start to make the diagnostic quik as possable? thanks for any feedback

 

solved! it was my fuel pump doing the same thing as my other gess the longer pump sock dident help any,once it gets below a half a tank it starts sucking air

 

lol How is that catch can doing anything?