i ran into little issue last night...i was messing around with my boost comp map..

so i was doing a 4th gear pull...in the middle the boost gauge shoots up to 15, i'm like ****, then i let it off...

since then i'm seeing few weird symptoms:

1. i build really quick, like unrealistically fast
2. when i do build boost, it doesn't feel like i'm actually build boost (much slowwwer)
3. at idle, my boost gaue used to read -20~psi but it was reading -10psi
4. my ems concurs with -10psi at idle
5. when it went above 11psi, my ems's reading of MAP basically crapped out. it stayed at 10.56 flatlined.
6. now even at 10psi, it does not feel like 10psi.

so basically, even though i've done nothing to my boost controller, i'm overboosting (according to my boost gauge and ems) and when it does, it feel like less than 5psi...and my idle vacuum is really high..any idea what could have happened guys?

i've searched and it seems like maybe a vacuum leak? or busted charge pipe (since this would explain 10psi not feeling like 2 psi). also, could my MAP sensor have crapped out? i'm not sure if eBay boost controller or TiAL wastegate is at fault.

i'm just trying to think of all the possibilities here...thanks for the help.

 

What kind of MAP are you running? It does sound like a vacuum leak since you aren't pulling enough VAC.

 

still using honda stock MAP sensor.

 

Honda Map sensors are only good until like what 12 psi, before they freak out and the car goes into safe mode.

Id also go through and check all of your couplings/ vacuum lines.

 

checked the vacuum lines, charge pipes, they all seem to be in a good order.

but i think there is discrepancy between what ems tells me and what my boost gauge says.

my boost gauge is showing -20 psi at idle while ems says -10 psi. hmmmm, what else do i need to check? thanks guys.