Jeep far too slow, can't proceed

[The Actual Zodiac Killer]

The Jeep Trek level is bugged for me. The jeep is way too slow, and I can't make it past the first jump. Does anybody have any idea how to fix this?

[JMD-14]

It's not a bug. You need to press and hold the shift button to get the boost needed to make that jump, and the subsequent jumps in the level.