ok, i have a stock b16 boosted on 8 lbs. it ran perfectly fine, then one day it wouldn't rev out. when i punch it, it will climb thru the rpm like normal then just cut, almost like it hits fuel cut. it won't do it at any certain rpm. it varies on how hard i'm getting on it. if i barely ease on the throttle it will rev all the way out. but if i really try to hammer it then it cuts. i've changed the tps sensor and checked the injector wiring. please help. i'm wanting to get a new car but can't sell this one if its cutting out

 

try swapping ecu's with someone...throwing any codes? what you have it tuned on?

 

Has the car been tuned or is it on a basemap?

 

tuned on hondata s100 a while back.

 

i tried it with a p28 knowing it wouldn't work since i've got different injectors and stuff. it barely even ran. i took the chip out and cleaned it out with air but its still cutting. all i can think of is faulty wiring but i don't know what wires it may be

 

Try adding a ground wire from the ecu corner screw to the chassis of the car and see if it helps.

 

do u have an after market fuel pump!? n how big is ur injectors?

 

the injectors are 550cc and yes i have a walbro 255 pump. like i said, it wasn't always like this. it just started one day, which is why i suspect its wiring or the ecu

 

I had the exact same problem. It turned out to be the ICM and the Ignitor. Replaced both of them and ITS like a different car

 

Is it possible you are hitting boost cut? It sounds like it is load dependent, not RPM dependent.

 

Could also be the o2 wiring... my stock civic used to fall on it's face randomly then spring back to life if I went WOT.

It turned out to be loose wiring on the O2 sensor causing the car not to know how to fuel the car in open loop but at WOT it just uses the fuel map i/o the O2 reading to fuel it.

 

yes thats very possible (answering for the thread owner)

 

x's 2

 

its definitely not the o2 sensor since my ecu is flashed to not read them lol

but if its boost cut would it just begin one day? cause it didn't always do it

 

Do you know what your boost cut settings are?

It is possible that your MAP sensor is dirty, causing incorrect readings possible resulting in boost cut. A really simple variable elimination would be to clean the MAP sensor.

Can you datalog with the Hondata unit you have? If so, datalog an instance of low-load, full RPM operation, then datalog an instance of full-load with the problem you are describing.

 

sounds like a ingtions problem my car wound't rev past 5or 6 k i changed my coil and it reved fine after that