I put the car in third and let it go to around 4k then i gun it. and it spikes around 15 and hold like 14 or 13. it does the same in any gear and from a dig. u guys think it might be a boost leak? o and i got a ****ed up sensor. so its giving me the check engine light. its the senson that come attached to the mass airflow wire. i dont know if that has anything to do with it? i made the car run open boost to see if it would go higher and it didnt?
my mods are: SBR MBC, 3" megan turbo back, agp intercooler, turbo xs intercooler pipes.
anyone know what the problem is?

 

You are hitting wastegate pressure. Are you still on the stock boost solenoid or do you have a manual boost controller?

 

this is the messed up sensor.

 

Slow boy racing manual boost controller

 

thats a solenoid... looks like the boost solenoid if it was right under the mas air.


Eddie Rosado

 

yea its that. i went to the dealer but they didnt have it. so i ordered it from them. 75 bucks lol.

 

If you are running an MBC, then you shouldn´t need the solenoid ports hooked up to the boost/vacuum hoses. As long as it´s plugged in to the electrical harness you should be O.K.

 

just wasted 75 bux

 

lol, you can say that again

 

i didnt buy the sensor yet.

 

its throwing the check engine if i dont buy the solenoid thing that i showed above.

 

i'm having the same problem 15psi max & i know its not the intercooler piping?!

i looked around in the engine bay to see if any hoses blew off but didnt find anything, i'm thinking its my dv?

 

WG pressure, your MBC is not functioning properly. Check all the hoses and make sure that they are installed correctly.

 

did this happen just after you installed the mbc or randomly it started to only boost 15psi.

tx evo8 +1

 

+1^ and make sure you check the WG inlet to make sure its not bent. I had the same thing happen to me and thought I routed MBC incorrectly, but I actually bent the WG actuator inlet. And ummm once MBC is in, then boost solenoid doesn't even matter..