I think that would be close to impossible to make, it would require some script that says the cops to chase you when the wheels get lifted from the ground.. that could cause issues for obvious reasons. There is however this great mod called arrestwarrant: http://www.gta4-mods.com/script/arre...ted-112-f10271
Basically it makes the cops more intelligent, they can identify you or your vehicle when seen long enough so when you escape theycan still continue the persuit when they see you or your vehicle. You can also get pulled over for traffic violations like speeding or driving on the wrong lane.
I'd say give that mod a try