General loss of power/slight shake

997 Views 7 Replies 5 Participants Last post by mheyman, Oct 2, 2020

Wildwilly

Discussion Starter · Sep 23, 2020

I have a 17 sti limited, in the past couple of weeks or so I’ve noticed a general loss in torque especially in S# also boost is struggling to peak at 17, I have around 60k miles and was originally thinking it could’ve been my clutch because the clutch pedal is definitely getting lighter but doesn’t feel like it’s slipping also when Engine breaking in 5th or even cruising in 6th I feel a slight shake in the car also figured that could be an alignment issue but am worried the loss and power and the shake are related, don’t hear any knock or anything out of the ordinary. Let me know what you think!

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mheyman

· #2 · Sep 23, 2020

If there is something wrong with the car fix it. Don't force it to struggle, Best to not drive it. At least stay out of boost.

Is there something wrong? I don't know, but it does not sound like a clutch issue if there is.

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Jay11STI

· #3 · Sep 23, 2020

Have you scanned the car for any codes or faults? Maybe do a smoke test to see if anything is leaking.

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Wildwilly

Discussion Starter · #4 · Sep 23, 2020

Jay11STI said:
Have you scanned the car for any codes or faults? Maybe do a smoke test to see if anything is leaking.

haven’t scanned it have no lights in the dash don’t have an Accessport to check either, taking it into Subaru this weekend 🤙🏼

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Wildwilly

Discussion Starter · #5 · Sep 23, 2020

mheyman said:
If there is something wrong with the car fix it. Don't force it to struggle, Best to not drive it. At least stay out of boost.

Is there something wrong? I don't know, but it does not sound like a clutch issue if there is.

thank you for the advice, it’s my daily so can’t not driver but I’ll keep it out of boost till I get It looked at 👍🏼

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SluttyCat

· #6 · Sep 30, 2020

Check the vacuum line on the wastegate or the hot side turbo housing. There might be a crack on the wastegate door. Since you're taking it to Subaru, they'll probably check that anyway. Let us know the update!

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Jedi03

· #7 · Oct 1, 2020

may be time for new plugs! 60k is a little low but things happen

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mheyman

· #8 · Oct 2, 2020

Yes try plugs first. The coils and injectors. I keep a spare good one around to swap in and out.

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