Got new turbo/injectors/chip on.....help with stumble please

[camaro75racer]

Well i got the TA48, 50#injectors, and TurboTweak chip on the car and running today. Everything seems to be doing good except for one small problem. When i first give the car some throttle from idle i get a stumble for a split second then after the car moves it runs perfect. It also has the same stumble in park/neutral when you initially apply throttle. Any idea's on this? Thanks for any help!

 

[cool 84]

You could have a vacuum leak from turbo to intake. Could be the chip needs to be tweaked a little. It's not uncommon to make small changes to a new chip on a new combo. You're not running an intercooler, are you? My dad ran 50s in his street car and drivability wasn't the best but most people have no problem with them.

I believe the Turbotweak chip requires one screen in the MAF to run right. This makes a huge difference in drivability. Also, make sure fuel pressure is set to what ever the chip maker suggests.

If running the 87 computer, you need the 87 MAF. It will run ok at best with stock injectors and 87 ECM, 84MAF, but with the bigger injectors, the problems get worse.