The camera Appears to be drunk or the Car
automatically moves forward .
I will teach you how to FiX it .
Firstly Download this tool here , for 32 bit systems and 64 bit systems
Install it and just restart your Computer .
Then Run the file called ' Revoke License ' . the game will start , wait for few minutes then Quit as usual . okay you are done . But always remember to run the file called ' LaunchGTAIV ' instead of ' GTAIV ' . Do that , and Always open it as Administrator .
I hope this small article helped you solve your problem with this awesome game !