problems, need help!

[chipo]

I have a friend that is new to his 97 automatic gsx, we have done some work to it but a common problem persists it is as follows, when under acceleration at about 4000 to 5000 rpms what seems to be a miss occurs. When we took it to the local auto parts store they said that it was a P0170. I am at a loss for what the problem could be i have done everything i can think of and nothing seems to work.
If you need more info let me know what can be useful and thanks for any help.

 

[97dsmtsi]

i think thats a code for the 02 sensor

 

[TurboTerror99]

Try searching.
Everything I've read says that code is: Fuel Trim Malfunction (Bank 1)
Search for possible solutions assosciated with this problem. I see several threads out there with some helpful information.

 

[chipo]

some mods on this car are coil on plug, 3" exhaust, front mount ic, revmaxx stage 2 stall, supposedly a big 16g but all ive seen out of it is 13psi and that is after running it through the shudder in the upper rmp range.

 

[WytChoclitJ]

I got the same code and it was Fuel Trim Malfunction. At the time I was running my bov into the atmosphere, but switched to recirculating my bov. Since then I don't throw that code unless I run it hard and the boost control kicks in. Grrrr...