hi. iv got a land cruiser 75 series 1hz and it has no pulling and speed doesnt go more 100kmph. i knew my engine was opend a few times and it needed a rebuild so i decided to buy a almost new 1hz engine for a toyota land cruiser 79 series. after i changed my engine the problem was still there. i changed my nozzles and serviced my injector pump fully. any idea what can be the problem?