ok so the b16 in my four door ef dx was running like crap but this just happened one day. i was driving it for about a month before any problems happened. sure i had codes but no serious codes just a vss code. anyway the problem is this. i would drive the car for a while just fine and it would move pretty good. then when i reached the normal engine temp my car would just start bogging all kinds. it was dangerous to drive on the road because there was no garenty it would move when you pressed the gas. it all started at like 3k rpm's. now i have an si motor in it and it is doing the same thing. i know its wiring or fuel somohow. i just need help chosseing the right one. but how would my wiring just go bad one day. its all soldered and heat shriked by some shop. help me out. thanks

 

check the fuel relay under the dash i had the same prob, changed it and it was good to go!

 

well u might want to check the fuel pump regulator or the fuel filter cuz my hatchback was doing the same thing when i did the mini me v-tec swap and i got the whole fuel pump and the filter and it stop doing it check the fuel pressure and go from there ......and good luck bro hope you find the problem......

 

yep JAKESPEC THATS ANOTHER THING YOU COULD CHECK THAT SOUNDS JUST ABOUT RIGHT I WOULD GO WITH THAT FIRST AND THEN GO THE ROUTE IM TALKING ABOUT ........

 

thanks alot guys. ill change that stuff out asap and get back to you. i had a good feeling it was fuel delivery because wiring doesent just fail lik ethat and 3000 rpm. thanks.

 

Are the wires and plugs to your ECU in and going ....cause that happened to me and it was a wire goin to ECU plug that came off...it was to one of the injectors and it came off the ECU plug.

 

i believe so. it fires right up every time and all 4 cylinders are firing just cuts out and sputters after 3k rpm and i think it actually does it untill 3k rpm