Another hesitation problem :(

[lovemy89240]

the only mods on the motor is a front mount, .50/.63 turbo and an emance tuned ecu for those upgrades. and its ran fine for months with those upgrades

It has a weird idle, fluctuates, sounds like its struggling to stay running and a slight misfire , but never died.

When driving it feels like something is holding it back, around the 2000rpm mark the car would hesitate and spit and sputter and not want to rev then itll rev to 5K but with reduced Power.

Ive replaced the O2 sensor with a Bosch piece, Ive also replaced the Coolant temp sensor, and the ECU isnt throwing any codes.... so any questions or possible fixes are welcome

here are some AFR's from my wideband

idle 13.0:1 - 17.0:1 usually around 14:1 - 15:1
first gear start= spikes up to 20.0:1
wide open throttle from 1200-4k rpm 10.5:1 - 11.0:1
while shifting spike to 16:1 - 17:1
maintaining speed (about 50) 14.0:1 - 15:1
deceleration in gear 9.0:1 - 12.0:1
and during a normal drive with a mix of hard and soft driving i saw a min AFR of 9.7:1 and a max of 21.4:1

[float_6969]

Sounds ignition related. Check your plugs. If that's OK, replace the ignition amplifier.

[lovemy89240]

Last I checked my plugs they were good, but I'll definatly check again.

Also yesturday I unplugged both the idle valves things on the right side of the intake manifold, and the round valve sensor thing under the manifold with a 2pin plug and a vacum line comming from the top and bottom of it and I still had the same hessitation issues.