Why do I have poor acceleration when its cold outside and vehicle is warmed up?

Sounds like a dying fuel pump. The gasoline flowing through the pump motor cools and lubricates the pump motor. Perhaps when the fuel pump is cold it's not pumping as well as it should. Check the fuel pressure while this is going on. Also check the fuel pressure regulator. It could be malfunctioning and not maintaining pressure when it's cold. Hope that helps! Jim

Ironically that was my first go to when the P0193 popped up over a year ago. I am an Automotive Technician, certified in A4-A7, Engine Performance has been a natural bane of existence to me. I didn't even know fuel filters existed after past a certain model year but sure enough that filter was black and that was on me. I did replace it. if my pump is failing given the time that I have been chasing the problem down should it not have fully failed by now? After the power injector cleaning the recovery of miles per gallon improved. But at this point the only things left is the Injectors themselves the fuel pump and I guess the fuel rail pressure sensor... it is a Bosch sensor and feel that it is the point of failure is not the case. Can you steer me in a clear direction to chase?

Have you checked the fuel filter yet?

replaced it less than 10k miles ago that is good to go. I have replaced every component on the fuel line system except the injectors and fuel pump. I have also carb cleaned the throttle body in its entirety as well. The only sensors I have not flagged yet because as I mentioned I am a certified tech and while engine performance isnt my strongest suit I know if I had a cam sensor failing or crank failing I would exhibit starting issues and an engine light should have come on long before now. I have zero lights on dash except for the stupid one tire pressure monitor sensor failing since replacing the Fuel rail pressure sensor. The IAC and Coolant temp sensors are still stock components as far as I am aware of. The vehicle is approaching 157k miles on the odometer ... but add about 200 or so hours of idle time into that calculation and i am more like at 175k miles on current engine. I did have the transmission full on overhauled and rebuilt by a very reputable transmission shop. so I can say I am comfortable condemning the transmission especially since this issue started right after going critically low on fuel.

oops I ment I am comfortable in not condemning the transmission especially since my issue started after I ran the fuel tank critically low on fuel without running out of fuel. so its not the transmission it cant be the transmission it has to be something on the fuel line system that I am overlooking. If my pump is weak can it be weak for up to a year plus and not leave me stranded??

Well, my 2003 S10 Pick Up has had a problem with the fuel pump for the past 12 years. The check valve in the pump assembly has been bad for at least that long. I have to turn the ignition switch on, wait for about five seconds, turn it off, then start it. This primes the fuel system. If I don't do that it'll crank excessively long before it starts. Different vehicle and a different symptom, I know, but my point is things don't always drop dead. I still believe the fuel pump was damaged when you nearly ran out of gas. Jim

I will take a look and replace the fuel pump and see if that finally clears up the acceleration issue. It really was the very first thing I condemned too. Now I believe that it has been and always was the fuel pump. If things still persist then I will update with either new info on the symptoms or will reply back saying all is fixed and a thank you to everyone for helping out. let me go and get it replaced. Also note it may take a bit of time to get it replaced they aint cheap nor is it in a very accessible place. I will reply with an update regardless.

Yes, please keep us posted. Looking forward to hearing what you find out! Jim