Hi all. My ZVHT Fiesta has got an annoying running problem & I'm hoping someone might have some suggestions!
Basically it's started holding back/hesitating from about 2000rpm. It does still go but it's def hesitating badly.
I have got a new Throttle Pot, changed plugs, checked everywhere for air leaks & still no change. Also tried running it temporarily with MAP sensor disconnected but hesitation was the same.
I have 2 stage boost & temporarily tried it on high boost, really didn't like this! Barely responded when I put foot down & sounded like a machine gun out the exhaust! Kind of similar to hitting rev limiter.
It had an MSD chip (OFAB ECU) & setup etc done only around a 1000 miles ago.
Any suggestions of what to try next would be much appreciated!
Thanks muchly.