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05-22-2018, 10:29 AM | #1 |
Scooby Newbie
Member#: 465248
Join Date: Mar 2017
Location: Lex KY
Vehicle:2015 WRX Galaxy Blue Pearl |
Don't beat me but I have a knock/DAM issue question.
/disclaimer: I did a search and didn't quite get what I was looking for and I keep my Cobb AP in the glove box .
Car info: 2015 WRX Prem 6MT 45k miles 93 Octane fuel Cobb AP with OTS S1 tune OEM Plugs So yesterday on my way home from work (about 40 miles) the car stumbled big time on accel at about 3.5k RPM. A massive shutter and bogging of the engine. It was super hot and humid, AC was on, speed was about 85mph. When I got home, I plugged up the AP and went for a drive on the highway. Recreating the previous situation I saw the DAM drop to .500, FKL to -9.xx and Feedback Knock to -1.41. After a while of driving the DAM came up .875, FKL numbers got better and the issue was less noticeable. No CEL was present. I reset the ECU and went back out again. At this point I just saw the normal -.35 FKLs I used to see when I kept the AP on the dash. Should I be concerned or just chalk this up to bad gas and the weather? The shuttering freaked me out because it was pretty violent. I was thinking it may be time for plugs and I know its past due to have the valves cleaned. Any advice would be welcomed. Thanks!
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05-24-2018, 10:36 AM | #2 |
Scooby Newbie
Member#: 484164
Join Date: Apr 2018
Location: South East Michigan
Vehicle:2015 WRX Ice Silver Metallic |
Hi! So I don’t have a reply to your question, but I thought maybe you might be able to answer one of mine? I have a 2015 base, and at 2k rpms in 2nd, I get a tapping/knocking sound. Does yours do this? Is it normal? I ask, because I was told it was rod knock, and I replaced the engine, and it still makes the same noise. I’m hoping I don’t have two bad engines. Any input or advice? Thanks!!!
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05-24-2018, 10:41 AM | #3 |
Scooby Guru
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:2016 STI |
^wait
you were told by WHO that it was rod knock and replaced the engine? You mean under warranty? |
05-24-2018, 10:44 AM | #4 | |
Scooby Newbie
Member#: 484164
Join Date: Apr 2018
Location: South East Michigan
Vehicle:2015 WRX Ice Silver Metallic |
Quote:
Hey! Had a few shops look at it to get opinions. It’s not under warranty because it’s modded, I bought it used a little over a month ago, and don’t remember hearing this noise when I bought it. Subaru wants 1200 to tear down the engine, and they will have it for two months. So I chose to get a used engine and put it in. But it’s still making the same darn noise. Grrr. |
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