need help

[blownG20]

As the title says the car will have a slight surge,jump in power. In other words when the car is at idle or driving it will rev up and down for no reason at all. I just installed a jwt ecu that was programed for a turbo,550 cc injectors, cobra maf, and 9:5 compersion also the ecu was for a Nx200/sentra 91-93. Everything was installed but the maf is a thunderbird maf with part number f1sf-12b579-aa. Also the motor i am running is a U13 abd i drive a 1992 g20. I am totally lost on what to do and this is the first time i have had the car running. also just to let you know, i just recieved the car from the shop a week ago and they said that the problem was in the tunning and i should call jim wolf about the problem. I'm just starting to think that they dont know what they are talking about since all they really work on is Honda's. Again please help i starting not to like my car any more

[137]

sounds like there may be a problem with the throttle position sensor, but i am not familiar enough with those engines to make a proper assesment.

[cotbu]

coolant temp sensor, possibly causing the fluctuating idle, check coolant level and check sensor connection.