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Fiesta st boost

ConnorFist18

ConnorFist18

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#1
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Medford Oregon
#1
Hello st owners usually I get 18-20 psi on boost, I changed my cold air intake back to stock to get through emissions went back to aftermarket, I’m only seeing numbers of 14.89 at the moment any ideas ?
 


dhminer

dhminer

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#2
Intake is all pre-boost so shouldn’t have any impact unless you’re running a massive turbo at 18-20 psi. Bad gas? What’s your OAR and timing showing?
 


Dialcaliper

Dialcaliper

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#3
ConnorFist18 said:
Hello st owners usually I get 18-20 psi on boost, I changed my cold air intake back to stock to get through emissions went back to aftermarket, I’m only seeing numbers of 14.89 at the moment any ideas ?
Click to expand...
Did you hook up the EVAP harness up correctly when swapping the intake back or mess with the symposer connection? If either connection to the cold side pipe is leaking or disconnected, you may have a boost leak.
 


dhminer

dhminer

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Dialcaliper said:
Did you hook up the EVAP harness up correctly when swapping the intake back or mess with the symposer connection? If either connection to the cold side pipe is leaking or disconnected, you may have a boost leak.
Click to expand...
Symposer could definitely do it if he messed with that. Would the evap harness cause low boost though? I thought our cars don’t really care about pre-turbo leaks but not entirely sure
 


OP
ConnorFist18

ConnorFist18

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Thread Starter #6
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Thread Starter #6
I have not messed with the symposer, I have looked at it and it seemed pretty snug isn’t there only 2 hoses connecting to it ?! I removed the stock intake a minute ago the 2jr is a cowl intake so it’s not near the symposer anymore. :( I do not have a smoke machine to visually see leaks I did clean off hoses and look for cracks and felt for air I have not took hoses off and I do not think I make enough boost to blow the hoses off. I only have a boomba bpv, a 2jr cowl intake, whoosh dp. The stuff I have messed with is pretty straight forward. Unless there is oil build up on the bpv causing boost issues.
dhminer said:
Symposer could definitely do it if he messed with that. Would the evap harness cause low boost though? I thought our cars don’t really care about pre-turbo leaks but not entirely sure[/QU
Click to expand...
 


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