Hey guys ive got a 100 series landcruiser I need help finding a fault. Ive got a hdj100 with a 1hd-fte manual transmission. Ive got a problem when i drive over bumps the engine cuts in and out. Sort of feels like engine surges. It also does it if i change gear a little bit to hard and make the car jolt. I have already checked all my earth and even changed earth cables. Pump and injectors only have 10k on them. Any help will be much appreciated. Thanks