Ok guys...help me solve this one....first off here what the condition of the motor is... ALl basic mods, 206/206 Comp Cam, with lifters, 15k on new rebuild runs strong, TRW forged Pistons, MSD 50s, PT 51 Turbo, 3'' SS THDP, Hooker dual exhaust, etc... I am running a stock IC...the PT 51, MSD 50s, and exhaust I just put on brand new last month, I have had 0 problems until i installed my DW neck on my stock IC. I took extar care to make sure the aluminum dust and shaving were cleaned out of the IC before reinstalling. Ok here is what is happening...the car makes a very strange noise under boost, it sound salmost like a turbo sneeze except...it is a flutter in the sound, so the turbo will be whistling and makign this flutter of "sneezes" under boost. My boost needle soemtime sshakes a little, soemtime snot, it happens at different boost levels, and soemtimes u can' hear it at all....Here what I have determined....
It is NOT smoking....plenty oil pressure, no power loss, no hesitation, no knock, no vaccum leaks, eveyrhtign seems to be ok. I thought maybe I could have blown a headgasket, but the car has no water oil mix, motor is nice a cool. I am running 15 PSI boost, on 93 octane fuel with Joe Lubrants 18* timing chip. I can brign the boost up and the noise is apparent after 10 PSI, and the boost needle really shakes when I let off. Upon installing the DW neck, I had no boost increase, I thought this to be strange. Is it possible my wastgate is malfunctioning? I have NO idea how to explain this in more detail, If I jsut give it 5 psi in runs and sounds fine no shakes....it only shakes upo about 10 or above, and when I let off. I apologize for not providing more information like scan tool data...I have been workign and this just came up... I did get a code thrown while letting the car warm up it was beign very codl natured, idle jumping around, btu after it was warm it was fine and went away...I believ it to be minimum air rate asjustment(IAC, TPS settings) because upon installin gthe new chip with combo it started to do thsi little by little, now it is bad. ANY ideas guys? Anythign to look for? Thanks for your time!
Cory
PS- This happens right when I get my new 9x11 LU converter and am abotu to redo my tranny....*sigh*...hope for the best, prepare for the worst.
It is NOT smoking....plenty oil pressure, no power loss, no hesitation, no knock, no vaccum leaks, eveyrhtign seems to be ok. I thought maybe I could have blown a headgasket, but the car has no water oil mix, motor is nice a cool. I am running 15 PSI boost, on 93 octane fuel with Joe Lubrants 18* timing chip. I can brign the boost up and the noise is apparent after 10 PSI, and the boost needle really shakes when I let off. Upon installing the DW neck, I had no boost increase, I thought this to be strange. Is it possible my wastgate is malfunctioning? I have NO idea how to explain this in more detail, If I jsut give it 5 psi in runs and sounds fine no shakes....it only shakes upo about 10 or above, and when I let off. I apologize for not providing more information like scan tool data...I have been workign and this just came up... I did get a code thrown while letting the car warm up it was beign very codl natured, idle jumping around, btu after it was warm it was fine and went away...I believ it to be minimum air rate asjustment(IAC, TPS settings) because upon installin gthe new chip with combo it started to do thsi little by little, now it is bad. ANY ideas guys? Anythign to look for? Thanks for your time!
Cory
PS- This happens right when I get my new 9x11 LU converter and am abotu to redo my tranny....*sigh*...hope for the best, prepare for the worst.