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View Full Version : S13 SR20DET Boosting to 5 Lbs ... HELP !!


futures14drift
03-05-2016, 03:34 PM
Hello Everyone,

I have a S13 SR20DET in my S13 Hatch with a ISR RS3871 turbo, 550c injectors, AEM ecu, Tial Q BOV, etc. A few months ago my exhaust manifold cracked and right before that the turbo went from fully boosting to 15 lbs, to barely hitting 5 pounds. After thinking it was due to the exhaust manifold leak i got a nice DOC Race manifold and installed that, with no luck. still boosting to 5 lbs, i replaced the wastegate actuator with a HKS adjustable one. still nothing. I have now replaced the Tial Q with a new one, new spark plugs, checked coilpacks, boost leak tested, turbo has no shaft play and no signs of damage, although i did find a little oil on the turbo side of the intercooler piping, sitting at the bottom where it meets with the intercooler. I really need some help here if anyone has any ideas i am all ears.
Thank you in advance

ultimateirving
03-09-2016, 09:31 PM
Man just chiming to say good luck. Hard diagnosis considering what you've checked.
Possible timing is getting retarded inhibiting boost? Via knock sensor or something ?

derass
03-09-2016, 10:53 PM
Someone just posted a thread like this. Turned out their turbine wheel was "missing". I assume the blades broke off or the wheel entirely from the shaft. Since you are still building some boost pressure, I would assume it could be a few broken blades as no wheel would equal zero boost. You said there were no signs of turbo damage, but take another look at the elbow / downpipe area for any raised points or lines where broken pieces may have hit before pulling the elbow.

KAT-PWR
03-11-2016, 11:57 AM
Did you boost leak test?

futures14drift
03-13-2016, 12:42 AM
Did you boost leak test?

Sorry i should have posted, i have fixed that issue but then running 18 lbs of boost the motor blew... rebuilding now lol

KAT-PWR
03-13-2016, 07:20 AM
What was the issue

cotbu
03-13-2016, 11:50 AM
Yeah what he said

ultimateirving
03-14-2016, 08:40 AM
~~~---____Waste gate was flopping open my guess. Then he secured it and the boost controller was still set high, wastegate didn't open something went pop.___---~~~

Am I close ?