Had to work this Saturday so didn't have a lot of time to sort the low power issue, but my Buddy brought his Snap-On scanner over for me to borrow.
On the engine running lame issues.
I ran a full scan on the Snap On scanner and no codes or errors.
I pulled the muffler and tailpipe off to be sure wasn't somehow choked down, no difference. Was a suggestion by a mechanic friend just to help diagnose.
I unplugged all the engine and O2 sensors one at a time like was also suggested and made no difference.
I then went old school and started pulling coil signal wires one at a time and discovered this odd condition that is in this video.
Check this out,
I have a 4 cylinder hemi..
https://photos.app.goo.gl/PFDNyZ9ZnRYVHfid6
It was only running on 4 cylinders, 3 on the left bank and 1 on the right bank. Cylinders 2, 3, 4 and 6 not firing. Can't believe it was running and driving at all, especially not throwing any codes.
I don't show in the video but I took an extra plug wire and plug and checked each cylinder and had spark in all 8.
So I figure it has to be fuel. I pulled the fuel rails and injectors and the 4 that matched up with the dead cylinders would not click when I bench tested them. I still have the injectors I took out of the engine when I got it, bench tested and sprayed cleaner through them, put them in and runs like it should.!! I'll also include that video.
So much better when all 8 are hitting...
https://photos.app.goo.gl/bKCsuuWAFZTPTgaUA
Put the exhaust back on and took it for a drive. WOW, what a difference
Drove it a few miles and everything seemed pretty good, then on my way home (just had to do it) I stood on it WOT and the instant I did that I got the CEL on and went into limp mode. I got 6 codes, 3 for the TB, P0121, P0123, P0223 and 3 for the accelerator pedal, P2101, P2110, P2135. Limped home cleared the codes and was out of time for the day.
Yesterday I took it out for another drive seemed to run very strong and perform as it should but I never went full throttle and didn't have any issues.
I may have an issue with the drive by wire not being fully synced between the TB and pedal at this time and need to look into that after i put a few more close to home test miles on it and see if it might self learn/adjust.
Does anyone know if I'll have to do a relearn on the pedal/TB or will it self adjust over time?
The 6-8 miles I drove it yesterday already let me know the time and money spent is going to be well worth it.!!