- Hey everyone! I would like to ask some help to figure out whats wrong with it. 2006 mazda 5 sport d 140bhp. When i keep pressing the acc pedal it revs up around 3.5/4k than drops straight away to 1k (foot still down) up again and down up and down..... i just noticed if it gets a bit warmer it revs up only till 3k. It does the same when i try to drive it. No rough idle, hesitation, stalling, it feels like you just simple released the pedal than pressed it again. Just noticed the injector seals are not the best, some exh gas coming out by rocker seals but i dont think it can cause this problem. If anyone has any idea, please share with me, i have no idea where do i have to start hunting the problem. Thank you all!!!