New to me 02' 986 S

[fivepointnine]

I would probably bet it is an O2 sensor that is your issue, low gas mileage, etc can be caused if the second O2 is bad, the car never reads that it is warmed up and stays in the warmup loop (runs rich) trust me, when the car is running right if feels like more than 250hp

[shadrach74]

Originally Posted by fivepointnine

I would probably bet it is an O2 sensor that is your issue, low gas mileage, etc can be caused if the second O2 is bad, the car never reads that it is warmed up and stays in the warmup loop (runs rich) trust me, when the car is running right if feels like more than 250hp

Good to know. Right now my 13 yr old GS400 with 203,000mile would beat my S in a drag race by a large margin.

What you say about the the richness make sense as I get a rather significant uptick in performance on cool nights. I realize that engines always run better in cool weather, but going from an
OAT of 80 df to 65df should not make that big of a difference, but in the case of my car, it makes very a noticeable difference...