hi all,

to start by telling the story from the start : i have an evo 9 with some basic mods: ecuflash remap, TBE, hks air intake.

it all happenned in an autocross race

i was at the start, put on launch control but it turns out i wait too long with the car in launch mod.
the minute i launched the car started doing as if it were working on 3 cylinders... check engine went on... power was very slow to build and my car was slow. as i continued the race, it started working normally progressively.

after i finished the 2 laps, i was all panicked, asked a mechanic who calmed me down saying it was the oil that dried out in the "cam follower" because of the car being in launch control for a long time and that it should be back to normal once oil is back .

i check the DTC error code :
P0303 No.3 cylinder misfire detected which i cleared and it didnt appear after that.

i kept on monitoring the car oil level and knocks with evoscan.

since then i m having all sort of crazy DTC error codes appearing and disappearing with a constant error staying all the time :

constant : Vehicle speed sensor

the codes that appeared and disappeared each time i drove my car without me clearing them :
Barometric pressure sensor
Fuel pump relay
Injector circuit
EGR sensor

i m going nuts now. what the ... is happening?

can someone tell me what is the vehicle speed sensor error code and how to solve it ? ( it may be the cause of the rest of the codes...)

plus do you think what the mechanic said about the misfire happening because of the launch is true? i personnaly think it's my car being overly rich in fuel because of the time i kept my car in launch mode

any more consequences?


HELP PLEASE!!!

 

78 reads, and not one answer. cmon guys, i need your help .. anyone had the same problems ?

 

first i would try disconnecting the battery and let the ecu and everything reset. Wait a couple of minutes with the neg terminal off. I have "fixed" cars with doing that...trust me. While you are doing that pull your spark plugs and see how they look. The misfire on cyl 3 could be from a fowled plug. As for the other codes they are kind of random. Many times, the ecu gets "confused". Start with that and see what happens.

 

If you arent tuned to VTA on your BOV, it will throw those codes and make your car run like that. Make sure you arent leaking air somewhere between the bov discharge and the turbo inlet.