falling on its face, ALMOST got the hiccups oWt! Options

[easternpiro1]

hey guys, i have recently been in the habit of pulling a a lagos move( )and ive been babying my car until dyno tune time... my car has emanage blue with a base map to get me by until then.

sorry if i explain too long...

my question is ive noticed that when i go WOT when i reach a certain speed/rpm the motor cuts out, as if hit fuel cut. now ive experienced this once before, and i will just say i was going way over the speed limit, but this time i was just around 80. after this, my check engine light came on, and i noticed that i couldnt get into boost (i hear it spooling but no response) it sorta felt like i had a leak somewhere.

I pull over, check my fittings, ic piping etc and everythings good. what i noticed when i turned the car back on was that the check engine light was no longer on, but it was still acting as if it wouldnt go into boost. I wait until daytime to be sure there is nothing loose, and take it for a brief run... no problems. (mind you i didnt get on it hard though)

what do you guys think caused the brief stopping of the motor? im inclined to think that it was fuel cut (due to the base tune done)

oh i forgot to mention, my wideband usually reads 10-11 even when cruising, but sometimes i hear/feel a small hickup and it will jump to 14 when cruising. i noticed now that when i accelerate, it goes from 10 to 14, (at about 4k rpm) then back down to ten. am i right in assuming that this is just a tuning hickup and wait? if not what should i check next?

again, sorry i typed so much, just wanted to be as detailed as possible for those without ADD like me, can ya help me out?

This post has been edited by easternpiro1: Oct 18, 2009 - 10:40 PM

[easternpiro1]

UPDATE: Over the past few weeks, i have checked codes and I found i was running a 21,24,25,52,&78.

tweak walked me thru how to run a diagnostic in my car by grounding a wire from the ecu and sent me this code list.

after replacing the knock sensor and O2 sensor, i figured i would be runnin good, but car is still running erratic. (is also still hitting boost cut, which will hopefully be fixed when i get an external map and tune)

I know why its hard for me to hold boost at highway speed(cheapo B.S. RFL blow off valve) but what i found interesting is that after driving on the highway, and going to normal street speeds, the car idles and accelerates rough, sporadically. it feels rough when accelerating, then kicks in like normal.


anybody know what may be causing this? sorry if i may not have explained well enough, please ask if you need clarification.

im thinking my a coupler on my ic piping may be loose, but ive checked them. will double check again tomorrow.



i attatched some diagnostic codes in case somebody may need to check theirs down the line (thanx tweak,and lagos for all the help!)