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Partial Loss Of Boost Pressure


coach3062

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  • Member
  • Member For: 18y 9m 18d
  • Gender: Male
  • Location: North west NSW

My BA turbo ute that usually has 10psi and 290rwkws has dropped back to 7psi and less power.

It has injectors, valve springs, monza cooler, hi-flow cat, ubp, plazaman piping kit, cai and normally goes well. Recently it lost power but still runs well (ie; smoothly,starts well, revs cleanly).

So I checked all plumbing, new gapped iridium plugs, new air filter, lubed boost solenoid.

No difference!

I recently trailered my son-in-laws Calais (that felt good) a couple of hundred klms, but not too quickly. The problems started around that time.

Is it likely the catalytic converter has gone to greener pastures? Any other likely causes?

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  • Member For: 17y 5m 1d
  • Gender: Male
  • Location: Adelaide

I would put my money on actuator... try a 7 psi actuator it will hold boost steady for 10 or 12 psi.

standard actuator is rated at about 3 or 4 psi but sometimes if your lucky for a while you will see 10 psi

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  • Member For: 16y 10m 14d
  • Gender: Male
  • Location: riverland south aus

ok I dont want to hijack this post but was just thinking about it and reading some other threads and my car makes a constant air hissing sound en aproaching boost with a capa flash tuner. is this just spooling up or is it a boost leak

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