Quote:
Originally Posted by Jared.FR-S
So I am starting to get into cars (I’m a noob!) and I own a ‘13 FR-S.
A few problems I am having with it:
-Squealing noise when I start it up in the morning (30-45 degrees) not sure what it is??
-Check engine light, says it’s the o2 sensor, the o2 sensor has been replaced twice and it’s burned them up. I do not have a header but I do have a Borla axle-back exhaust on it ( pretty sure, haven’t jacked it up to see what exactly is going on under it ) . I got the car modified like this and not sure if it was tuned... or if it even needs a tune. I’ve been to multiple mechanics
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Hello Jared.FR-S and welcome to ...... The Forum .......
On your next cold start, I suggest you open the hood, lean over the engine, have someone else start the car and see (hear) if you can isolate where the squeal is coming from.
Since your car has an AT, my guess would be a lose serpentine belt or a bearing in the idler pulley or A/C compressor or the alternator.
The axle back muffler shouldn't require the engine to be "tuned" nor should it cause a O2 code to be thrown.
humfrz