I have a 2003 Evo 8. Recently I just installed Buschur TBE, Inline MBC, Buschur Filter Kit w/ MAF Pipe Kit and UICP....basically all of their Stage 2 package.

When I took the car out I was boosting around 18-19 psi and in 3rd and 4th gear around redline, the car would feel like it would cut out and a loud pssshhh sound would occur. My CEL came on and when I got a diagnostic, it read that I had engine overboost.

My question is, would a tune fix this so I can run higher psi? or is this abnormal?

Also, if anyone knows of a great tuning place I could go that would be great. I live in NE Ohio.

 

you need to put a vacum caps on the slenoid openings. and make sure you still have it plugged in as well-JOEYD

 

check for a boost leak....my friends 9 did the same thing.

 

i got the same thing, it all happened with a bad tune i got. to rich, timing not right, the dude was a moron. i took it to Lucas at English Racing. he tuned it and i never got another light. i ran 21 psi til i upgraded the the fuel system. now i run 25 and it pulls great. get a good tune and youll be set. also i suggest at the very least getting an A/F gauge installed. make sure you arent running lean or too rich.

 

It's really weird. It was only happening when the boost was turned up to 18-19. If I turn the boost down to 16-17 it acts fine.

 

David Buschur is out this whole week. Should I wait until next Friday to get a tune or is there a reputable tuner in the Ohio area. I will be home Thursday night so I can drive a good distance on Friday.

 

Does Buschur flash the factory ECU's?

 

i had the same problem with my 04 until i put an afc in it with a stage 2 buschur tune

 

yes, david works with both stock and ems, etc

 

you should move this thread to the regionals to find help in your area

and turn your boost down and baby the car till you figure it out.

 

^^^ this will help

 

isnt that a boost cut???
you just need to lower your boost down until you get tuned... You can rest the ECU but when you hit the boost cut twice, the CEL will come up again.. All you need is a tune..

 

Is your ECU stock?

Don't think not having the solenoid ports capped will have anything to do with it as stated above. The ecu just wants to see a load in the circuit, if not it gives a (different) cel

 

seems to be what happened.

As for the caps....I have already completed this when I installed the mbc.

 

hmm my buddies car did the same thing when he was installing an intake in his 03 he took the loop the previous owner did with the factory selenoid and just left them open and is popped the enine overboost code. I had some vaccum caps laying around so I through them on there and it has never happened again 6 months atleast-JOEYD