I got p0300 - Random Misfire

p0502 - Vehicle Speed Sensor Low Input

is this normal after a higher stall is installed?

 

I would say no unless you screwed up some of the wiring on the vss and the O2 sensors. Normal codes from a stall are P0751 and P0757. These are shift solenoid codes that the tests need to be deleted. Vince

 

Random misfire sometimes. Because of the smaller diameter, less rotating mass of the new converter.

 

the misfire codes are definitely normal as for the vss code im sure that is related and will go away once you get a tune for the stall

 

Random Misfire yes. VSS yes. Retune trans shift points and raise misfire calculations to 37662 in Engine DTC's.

 

Thank you sir so this is what I need to tell my tuner or should he already know?
The car dosent seem to be acting up at all except maybe a little extra shaking at idle from the misfire but its barely there. Car seems to run great.