Got my 5.4 3V replaced a couple months back due to a dropped valve.
Since I got it back, I’ve had a rough idle, a little shutter in drive when I let off the brake and then it runs great.
I’ve used numerous code readers and scanner and there are no active codes. Just left the engine builder and he is thinking I have a clogged or leaking hector. After plotting the short term fuel trims there is a strange difference between the two.
On the same time scale the bank one trim bounces up and down around 2-3x more then bank 2. Bank 2 is consistent with a couple higher spots when the a/c compressor kicks on and off. Bank one is a jagged up and down with essentially no smooth section.
I’ll work on sharing a picture of what I plotted but what would make the short term fuel trim on one bank bounce 2-3x more then the other bank. I have all new coils and the engine runs great at higher RPM. Is it time for new fuel injectors? There are 166k on the truck.
Since I got it back, I’ve had a rough idle, a little shutter in drive when I let off the brake and then it runs great.
I’ve used numerous code readers and scanner and there are no active codes. Just left the engine builder and he is thinking I have a clogged or leaking hector. After plotting the short term fuel trims there is a strange difference between the two.
On the same time scale the bank one trim bounces up and down around 2-3x more then bank 2. Bank 2 is consistent with a couple higher spots when the a/c compressor kicks on and off. Bank one is a jagged up and down with essentially no smooth section.
I’ll work on sharing a picture of what I plotted but what would make the short term fuel trim on one bank bounce 2-3x more then the other bank. I have all new coils and the engine runs great at higher RPM. Is it time for new fuel injectors? There are 166k on the truck.