Gem frst

Fiesta rs turbo running rough what would cause rough running? It's had full service new plugs leads coil pack new battery alternator checked fuel pump getting the volts loom checked and earth's cleaned new cold start sensor tried a known set of good injectors and no difference it's running ofab with 3 bar map and t3 but otherwise std

fiend

iTrader: (1)

Have you changed the coolant temp sensor on the back of the inlet? Do you have a chip fitted?

Gem frst

Yes changed the coolant sensor and no chip fitted does smell bit rich

frsjon

no chip but a 3 bar map sensor wont help

Gem frst

Would a 165 chip be Ok or does it need to be 195

Gem frst

Right few have said 3bar and no chip is the problem can anyone explain why ? And any chips avaliable any where?

Darren

Back in the day I had a similar problem with my FRST, ended up at Turbosystems where they sorted it no problem..........believe it or not it was all down to dodgy supressors that Ford decided to put on everything to stop radio interference - different car when these had been removed and to be honest made no difference to radio reception at all.......think the main offender was one on the map sensor if memory serves me right.

s1cosse

Had this fault before. Sounds like the map sensor filter, you have to get the resin of the back off it to get to the 3 solder joints and re flow them. Once done re set base co to 0.70 .