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wastegate not opening

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fastaseagle

15+ Year Contributor
64
0
Dec 17, 2003
london, Ohio
first let me say im running a 20g with a tial 38mm external gate.. and the car seems to build boost only like 10-13 lbs it has a 13psi spring in it. but the wastegate isnt opening at all its just like a loud winding noise.. the car doesnt pull at all untill like 5500rpm.. i know it should build boost before that. Im also running a turbo xs boost controller set at 0 just to run the spring on the wastegate... my timing seems to be okay on the logger when running at a normal speed 55-60 it at 30-33 degrees... also at idle its at 6 degrees. the car also dies on me alot at stop signs and such right after i let off the gas.. but if the motor is could it will do just fine.. the tps seems to be getting voltage.. i have 750cc injectors a 255 pump and a aremotive regulator set at 43 psi and a s-afc to tune with along with a logger. any help would be appreciated.. Danny
 
If the wastegate wasn't opening you would be making like 30psi+

Try running a straight vacuum line the the wastegate without the MBC installed and see what happens.
 
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