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Lost acceleration and exhaust noise

1299 Views 9 Replies 3 Participants Last post by  WRX-maniac
So I’ve got a 2014 wrx hatch mods are bov, cai, straight pipe from main cat back, stage 3 clutch and some type of tune (idk the owner before me had it tuned) I did a pull and then down shifted and car was responded fine 5 minutes later my car is getting quieter and slower after another 5 minutes my car feels like it doesn’t even wanna go fast car is nearly silent. I take off my negative terminal take off my turbo my intercooler and all that check my maf check all my vacuum lines and boost lines nothing is strange all look fine all my gaskets for intercooler and turbo look fine my turbo still spools but noticeable less psi (don’t have a boost gauge but I can hear it due to cai and bov) buddy of mine hooked it up to his computer see if any codes were triggered (don’t have a cel on) only thing it pulled was maf I cleaned it reset everything and no light came on but car still feels like in limp mode. Oil level is good no coolant in oil no exhaust smoke no cel no knocking or ticking from engine only thing I think it can be it a tuning issue or clogged cat. Any other suggestions or any advice on what to do?
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Sounds like it is pulling global timing due to knock.

Have you modified anything on the car after the tune?
I deleted the secondary cat, did a cold air intake and did atmospheric blow off valve car was running fine after all those mods. Car is sluggish now no exhaust noise and stalls on deceleration
Sounds like it is pulling global timing due to knock.

Have you modified anything on the car after the tune?
I deleted the secondary cat, did a cold air intake and did atmospheric blow off valve car was running fine after all those mods. Car is sluggish now no exhaust noise and stalls on deceleration as we speak I’m disconnecting both terminals for a day see if it resets ecu
I deleted the secondary cat, did a cold air intake and did atmospheric blow off valve car was running fine after all those mods. Car is sluggish now no exhaust noise and stalls on deceleration as we speak I’m disconnecting both terminals for a day see if it resets ecu
To fix your problem undo everything you did after the tune, or pay a shop to tune it for you.

This isn't a mix and match game. You tune a car as it sits, you change anything, you retune the car.
To fix your problem undo everything you did after the tune, or pay a shop to tune it for you.

This isn't a mix and match game. You tune a car as it sits, you change anything, you retune the car.
This would explain why the car nearly feels like it’s in limp mode? My car was able to gap srts and stay with 5.0s now I struggle to even keep up with new civics I just am praying it’s nothing internally
This would explain why the car nearly feels like it’s in limp mode? My car was able to gap srts and stay with 5.0s now I struggle to even keep up with new civics I just am praying it’s nothing internally
Could be. The EJ is not forgiving. Your ecu also does not support blow off valves in any form. Ditch that.

Also I had a GR hatch about like yours. You are being generous about how fast it was.
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Could be. The EJ is not forgiving. Your ecu also does not support blow off valves in any form. Ditch that.

Also I had a GR hatch about like yours. You are being generous about how fast it was.
I don’t know what tune he had on there but the car was very fast I was faster than my sti counterparts now it’s slower than stock
I don’t know what tune he had on there but the car was very fast I was faster than my sti counterparts now it’s slower than stock
The tune isn't going to make that much of a difference across the board.

The wrx off the line was faster to 60 and if I'm not mistaken faster in the quarter mile as well. It wasn't until it was on a track or auto course the sti shows it's chops.
This is what happens when you mod without knowledge. Just be ready, could be internal engine failure. Which can cost 10k+ to rebuild and fix. Remember this next time when you throw aftermarket parts on a car without knowing what you are doing. I hope for your sake its not an engine failure. Keep us posted and chock this up as a lesson learned.
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