WEll after the engine was replaced, It seems like at red lights wants to stall them goes back to smooth, also lag in gas pedel sometimes, think they might have given me cheap gas, as they filled the tank for me...any thoughts???

 

When I bought my xfire from the dealer, he filled the tank with gas also. But I doubt he put in high-test. It ran fine for me until I got the next fill-up.

 

it only happens sometimes...but might wait till the tank is empty and refill and then check it...

 

It's from the extra parts they had left and didn't know where they were suppose to go.

 

LOL...maybe...runs very nice at high speeds.

 

Just drive around for a couple of months and give it a chance to settle down and moving parts to fit better. It's been taken apart and rebuilt so maybe it needs time to get broken in. Also the various computers and control systems might need to relearn your driving style. Congrats on having your car back.

 

that's what i am going to do...

 

it shouldn't be stalling. have them check the oxygen sensor.

 

It never stalls, just wants too if that makes sense.

 

yup it does. I would still have them check the oxygen sensor. Especially if you have refuelled since the dealership. I have an oxygen sensor issue right now, not with my srt6 but another vehicle and it is doing the exact same thing along with decreased fuel mileage.

 

The check engine light would be on if it was the oxygen sensor.

 

Have not refuled have to drive a hour to go there so will see what happens...still have 3/4 of a tank.

 

The best thing to do is drive it for 100 or 200 miles and see how it is. Unless it gets worse if it does bring it back.

 

that's what i will do 45 days with out her was way to long...

 

My car idles rough sometimes for no reason and I always use premium so it might just be another bug with these cars.

 

Before this engine was smooth as silk...

 

That's the way it should work but the oxygen sensor in my Dodge failed and the check engine light never came on.

 

I wouldn't worry about for now till you drive it for awhile it might just be ecu readjusting.

 

At about 32k my xf started to do the check-engine light / stall out or near stall at some stoplights, but not every time. Took it in for an oil change and to have it checked out. Service tech said bad O2 sensor and wanted over $450 to fix it. Did some serious searching for the part online and just about paid $85 for one to change myself.

Now for the funny part, I had to take it back in because the tire pressure sensor light wouldn't shut off. They must have done a few resets because once they gave it back to me, no more check engine light and I haven't had it stall. She now has 58k and not a hint of any problems.

My suggestion - take it back and have the tech reset the ecm. Something is out of tolerance with the O2 sensor.