[MontrealPharoah]

Hi everyone, this is my first post so please bear with me as I'm new to the Porsche world and I'm having a problem that I'm going to discuss in detail in order to give all the info.

So I have a 1998 986 Boxster that has 151K Kilometers on it and it's in pretty great condition given it's age.

The previous owner I bought her from had the O2 sensors replaced for me before handing her over and it prompted a CEL which I assumed was just the sensors adapting or something of that sort.

So after almost two weeks I bought a cheap OBDII scanner (ANCEL AD310) and decided to clear the codes because I didn't wanna take her to a shop just to get the codes cleared.

The only code that the scanner showed was for the O2 sensor and since they were brand new, I decided it was okay to clear it.

Fast forward two days after (didn't drive it the next day), I get in my car and immediately I hear something wrong with the engine coming from the left side. I start moving and I hear popcorn noises from the left and she keeps on stuttering. I drive to a parking lot right next to my house and it feels like she barely has any power and every time I press the gas I hear the popcorn noises again. I give a few revs and wait like 5 minutes and it feels like she's a bit better.

She's a bit stuttery until I get to the highway and keeps shutting off and then on the highway it feels like she doesn't have enough power to reach 100 km/h while on 3rd. At some point, I shift up to 4th and she accelerates so it feels like she was lacking power from med. to high rpm.

I get where I need to get and I get in 3 hours later and she was mostly fine. Shut off a couple times in traffic but after that she was fine?

I hook the OBD2 sensor when I get home and I get the following codes:

P1317 - Misfire Cylinder 5 - Emission Related
P1215 - Misfire Cylinder 4 - Emission Related
P0130 - O2 Sensor Circuit - Bank 1 sensor 1
P0150 - O2 Sensor Circuit - Bank 2 sensor 1
P1130 - Oxygen Sensing

This was yesterday.

Today I start her up while worried the same thing would happen and she blows a lil white smoke from the exhaust that lasts about a minute or less but otherwise, she seems fine. I felt a bit of a loss of power on the highway and I could smell a bit of gas yet nothing alarming. Besides that, she seemed to run fine and without any issues.

I thought of clearing the codes again and seeing what happens but I'm honestly a bit worried to do so as I feel like that was the action that brought me here in the first place.

I'm very sorry for such a long post, I just thought it would better to give all the information I can give so whoever is reading can have the full picture.

Thanks in advance!