Yesterday I installed a Steeda 555-3710 oil separator on my Grand Marquis, after experiencing problems with detonation and some blue smoke out the passenger side tailpipe only (no smoke at all from the driver's side tailpipe).
The good news is, there's no more detonation and no more blue smoke no matter what you do. I don't know how relevant this is, but the car has much better get up and go as well. The downside is I noticed a huge drop in fuel economy.
I fueled up right after installing the oil separator. Generally, by the time I have ¾ of a tank left, I would have usually driven between 125-150 km (79-94 miles) depending on how much city driving I do. I did a lot of highway driving yesterday and whilst the car has excellent get up and go, I've got half a tank left with just 160 km (100 miles) on this fill up.
Refueling every 320 km (200 miles) and 20 L/100 km (11.8 MPG) is a bit too rich for my blood. I used to average about 13-13.5 L/100 Km (17.5-18 MPG) with a bit of spirited driving, although with a light foot managed to get 12.5 L/100 km (18.8 MPG).
So this left me wondering if the catch can has anything to do with the air/fuel ratio and gas mileage. I was thinking maybe the PCM adapted to the issue, because there was quite a bit of oil going in. I thought about reseting the PCM to see if anything changes, although I was also considering leaving it alone to see if anything improved over the course of the next couple of fill ups. Any thoughts? Thanks!
The good news is, there's no more detonation and no more blue smoke no matter what you do. I don't know how relevant this is, but the car has much better get up and go as well. The downside is I noticed a huge drop in fuel economy.
I fueled up right after installing the oil separator. Generally, by the time I have ¾ of a tank left, I would have usually driven between 125-150 km (79-94 miles) depending on how much city driving I do. I did a lot of highway driving yesterday and whilst the car has excellent get up and go, I've got half a tank left with just 160 km (100 miles) on this fill up.
So this left me wondering if the catch can has anything to do with the air/fuel ratio and gas mileage. I was thinking maybe the PCM adapted to the issue, because there was quite a bit of oil going in. I thought about reseting the PCM to see if anything changes, although I was also considering leaving it alone to see if anything improved over the course of the next couple of fill ups. Any thoughts? Thanks!