AbbotD

Yesterday, The car stop really producing boost under 4500 rpm and the charge relief valve lost its unique quick burst sound and is more like a bleed off air sound.
I here it the turbo spool but it just sounds like its venting under the hood. I cant find a leak, nor do I really have a pressure tester so I just rev the motor. I can here a solinoid click and a ton of air in the intake and still some blow off from the crt.
I dont have a boost gauge I really would like to just sell the car and not dump alot of money in it. But seat of pant Id say the second turbo isnt pushing the car as hard either.
I went through this with little luck. http://www.autosportracetech.com/RX-...eakDiagram.htm So now Ill start ripping it apart I guess.

Thanks in advance

Abbot

Mahjik

iTrader: (1)

Without a boost gauge, you are basically going to be pissing into the wind.

However, if you suspect no boost before 4500 rpms, check the Charge Control system.

AbbotD

Forgot to add Im getting like a croaking sound from the CRT. Went through the engine bay with propane and got nothing.

AbbotD

ok put a boost gauge on and I got maybe a 1-4-10 and its very loud audible air sound before 4500rpm. I have a silicone coupler on the y pipe and I dont feel air blowing out of it when I rev the motor.

dontlift

I think that your 1-4-10 supports Mahjik's suggestion: it sounds like your Charge Control Valve or its solenoid could be stuck open, sending all your boost back to the intake.
(I don't think a stuck TCA would give you that air sound.)