3800 engine runs rough at cold start up

The pounds per inch changes on the scanner at higher RPM

I took out the MAF and cleaned it the car started cold and ran better but not right Idle was all over and the voltage on the MAF sensor was at 2.60 and went up to 2.80 at 3000RPM

I did find some small cracks in the top of the sensor looks like I must have hit it when I rebuilt the engine!

I cant here it but I can see the RPM on the scanner change

Ok Thanks I will let you know how it comes out in a week or two

I haven't got the new sensor yet I got one off ebay and it was damaged so I'm waiting for a replacement. My dad looked at the car on the scanner and said the TPS was unstable and thinks it maybe a ground problem with the PCM do you know where the ground Is I cleaned the ones at the bell housing? I do see one looks like an 18-16 Ga. Wire by the battery tray that looks suspect but the bolt is so badly rusted I haven't had the time to get it off yet! Could this be the problem I forgot that the speedometer is off by 3 MPH could that be related to the ground? And can you tell me where the speed sensor is? Thanks

Ted
P.S. I'm still planing to replace the Mass Air Flow Sensor because its damaged

I replaced the TPS and its fine now. I also replaced the MAF sensor and that is unstable and bounces up and down. I had the Idle speed set at 600 R.P.M.'S and that sets a code for random misfires I turned it up to 750 and no comes but if I rev it up and let go of the throttle is drops to 450 and picks back up to 750 but sometimes it will stall. Do you have any Ideas?

Ted