Ok so here is what happend drivin down the road on way home from work tonight i got some open road figure ill open the car up a bit Im running a stock turbo at 20 PSI so i get a over boost from the around 2500-3500 rpm range and my CEL comes on and IM like F&%k over boosted again so i bring the speed up slowly to get rpm up to 4000 then step on it and then the Motor gives a bit of a backfire i get out of the throttle and and look up there is a Police officer flashing me i pull over and he drives off (WOHA) so i drive the speed limit the rest of the way home i get the car in the garage and hook up my OBD II to the plug in and 4 codes come up the usual 2 when i over boost and a new one Iv never seen was a PO300 Muiltiple Cylinder Misfire Im like what is that from any help would be cool

here is mods

turbo XS Full exaust 3 "
Turbo XS down pipe
cat delete
perrin Short ram intake
perrin Boost tube
UTEC

 

Wow, nobody has EVER gotten a 0300 code before...

 

p0300 strikes again...

 

i think you rerally need to get this car Tuned properly. i was having similar problems till al from dyno flash street tuned my car. everything went away and car is perfect.

 

I have 27000 miles on my car. I was stock til 5000, then I did all the mods you can see in my sig... then at 22000 miles I got the P0300 code... why? Not sure. It comes and goes....

 

You need some punctuation marks in your paragraph. That was very difficult to read.

 

don't worry about it, just egt bew spark plug it should it fix it, atleast that's what i did

 

with your mods you really don't need that intake, it may actually be hurting you.... put your stock air box back on and drive for a while and see how that feels and if you still get the same code....

 

If you have a '03 or '04 Evo, Mitsubishi offers a reflash for EVO's constantly getting this code.
The WORKS P2 flash is the only (as far as we know) flash on the market that incorporates the changes made by Mitsubishi with our own tuning.

If this is the first time you got the code and you think it was due to the tuning (or lack of tuning) then clear the code and check everything. Make sure your tune is dead on before flogging on the car, unless you like to blow motors.

 

ok so its a on going problem i see i believe AL is comming to Seattle next month to worldoneperformance ill have them tune the car again then ill just baby it till then thanks guys