BajamanCam
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Posts posted by BajamanCam
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Taupo mate. Both solenoids open and close perfectly with no air leaks on a 9V battery, unsure what they'll be like under normal conditions though, as they do pulse. Still, the chances of both being dud and having the exact same issue, yet work fine off a 9V seems highly unlikely.
I'm wondering if the ECU has been played with before I took ownership, and not knowing about it? Has to be an electrical issue, seen as that a manual tap works fine?
Unfortunately with me being in Taupo, there's no one close (that I know of) that can log my ECU.
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Thanks for the welcome! I thought the standard boost solenoid as well, but I replaced it with an identical one and the same issue, so can't be? I've read many other forums with a similar issue and it's always the same answer - boost solenoid. But that doesn't seem to be my issue in this case, unless I bought an equally dud solenoid.
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Hey ClubSub! New member here, with an issue that me and Google can't solve by ourselves. I'll try keep it short.
My STi fluctuates it's boost, under WOT between 15-20psi - up, down, up, down, up, down... until I let off the gas. Occasionally it boost spikes to over 20psi before I can react and take my foot out.
Car details:
- Stock. Yep.
What I've checked/replaced:
- Checked wastegate, opens smoothly at 8(ish)psi
- New vacuum lines and boost pill (all in correct place, I've looked at many different diagrams over and over again)
- New boost solenoid
- Checked for leaks in intercooler and hoses
The thing that's really digging at me, is that it has always had a manual boost controller and held steady boost fine at 18psi. I don't like mbc's and decided to safely go back to the stock boost control system. So why is it holding boost fine with a mbc, and not the stock set-up... even though I seemed to have gone over everything?
Any help appreciated.
Cam
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V7 STi boost fluctuation issue - Ran out of ideas!
in Impreza, Crosstrek and XV
Posted
If the ECU is given an incorrect map (causing boost controller to go nuts), this can cause knocking with a manual boost controller can't it, as the air/fuel ratio will be fluctuating as well?
I think I need to take a roady somewhere for it to get logged, may get expensive!