Sputtering/power loss from 2-3K RPM upon acceleration

[72Truckman]

First post here. Love the website, searching has gotten me through many of the 'fun' times with my '06 xb12r.

Heres my issue. Starting yesterday, i noticed that upon acceleration in first gear i would have a surging/loss of power around 1500-3000 RPM. Scary to lose power when making a turn!! I didn't want to blow her up if something serious was wrong so I parked her. First thing I thought was fuel filter/pump, as i've had the same kind've struggling sensation in my Blazer before. I am away at school and dont have access to my shop at home to tear into this. What would y'all check? I will have access to ECMspy within a few days. Does this sound like it could have to do with TPS/AVF? Bad TPS sensor? I'd like any ideas that dont include pulling the fuel pump as i dont have the equipment in Los Angeles to do that.

Background: Battery is good, 10,500 miles, fresh Amsoil change, plugs about 3000+ ago, Jardine pipe, K&N filter, race map, breather reroute (jankily done by previous owner and needs redone)

Thanks!!

 

[uly luigi]

Start with tps reset, but after that, check for intake leak, are you being forced to run high ethanol mix gas? I have seen that be an issue too, not sure how the cali guys get around that problem, anyway good luck

 

[xtreme]

Don't know if you have messed with your spark plugs lately. But I had the same issue and it drove me crazy. I tried everything. Then went back to the basics. I found that the front cylinder plug wire was not 100% seated. It's a real bitch to get it seated. I recommend verifying!