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BRZ First-Gen (2012+) -- General Topics All discussions about the first-gen Subaru BRZ coupe |
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10-26-2023, 12:58 AM | #1 |
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Acceleration problems.
Hello!
I have a 2016 brz modded with tomei uel header, perrin 2.5 catback, and is tuned on delicious tune stage 2. Car has been driving great specially as a daily driver but recently (past 3 months) I got my clutch done, a month after clutch was done, i've had acceleration issues.. local shops couldn't figure out what was wrong with car.. no CEL or anything but the car is not 100% .... last week I found out I had a broken v-band on my exhaust, replaced it, drove around it seemed better but still seems having acceleration issues. I'm hoping it would be just a minor exhaust leak this time. or maybe spark plugs? any help would be appreciated! |
10-26-2023, 02:06 PM | #2 | |
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10-26-2023, 04:15 PM | #3 | |
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*drove car around today, accelerator seems to respond better but there's still a delay with rpm needle going up from time to time. RPM drop during idle isn't as terrible I thought it'd be spark plugs since I haven't changed them and I'm almost at 90,000 km and I'm trying to get in contact with my local tuner about the logs. |
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11-07-2023, 02:02 PM | #4 | |
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11-07-2023, 02:22 PM | #5 |
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11-10-2023, 09:35 AM | #6 |
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I'm having a similar problem which I haven't been able to diagnose. (14 FR-S) My OBD reading tells me that I'm only getting 80.1% absolute throttle. AFR when I give it WOT is 11.4. I have an ESC on my car but I don't think that's related. I cleaned the throttle body intake and the butterfly is positioned full open, but the car just doesn't feel as strong as it should. Not sure what to do next
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11-14-2023, 09:46 AM | #7 | |
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11-14-2023, 05:26 PM | #8 |
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for those who use an ESC, you'll know there's at is a two- position switch that most set at 60% and 80% throttle. That's what I did using my OBD reader. At that time it would also show 100% throttle when I floored it. The OBD was showing 100% absurd throttle, until I swapped out some new batteries for the ESC. I had run the car for a few hundred miles with the ESC turned off. That caused the batteries to go bad. Once I replaced the batteries and turned the ESC back on, I'm getting 80.1% ATP reading. Talked to the folks who make the OBD reader and they told me it's telling me what the ECU is telling it. I have a butterfly valve that's wide open and I'm wondering if there's something else in the throttle body assembly that's telling the car it's only supposed to get 80%.
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