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The mkiv Supra Owners Club

NOT boosting!!


Ibrar Jabbar
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This evening I managed to find some time to re-connect my boost guage, I then took the Sup out for a blast and noticed that I cannot boost beyond ~14 PSI, It seems as if the 2nd turbo is not boosting!!

Does anybody know the symptoms?

all help appreciated, cheers

 

PS. fully de-catted, HKS drager, VFCC

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UK Spec may not boost beyond 14psi with the cats out. My J spec only hits 14psi as well. I did have a old worn out Blitz BOV which was leaking pressure but that only added 2psi... Check that all of you pipe work is secure.

 

I assume you checked the connections for your boost gauge

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I noticed that mine whistles quite loudly when, I think, number 1 starts to spool and continues until I can't hear it any more 'cos of wind/road noise.

 

Is this normal, bearing in mind I'm going to be looking at why mine pulls like a train to 120 and then falls off to 125 max (no popping and stuttering of a limiter)?

 

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I ended up fitting a J-spec manifold and turbos in the end, It seems as if the second turbo isn't boosting! at 4500 RPM.  

All pipes / hoses look OK.

With the previous manifold and turbos I was boosting to 18 PSI.

Could it be the actuators or the wastegate faulty on the replacement manifold?

Any thing else I should check?

I want to get it all sorted before I advertise it. Cheers

 

(Edited by Ibrar Jabbar at 6:46 pm on Aug. 8, 2001)

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Just to let You all know, I have sorted the boosting problem, it seems as if, I was loosing pressure through the bottom intercooler hose.

Tightened up the clip with a 10mm socket, double checked all other pipes and clips.

Took the car out for blast and hit 18 PSI in 3rd, so all is fine know :-)

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