i have a 1.8 zetec focus, when im driving the car it randomly stutters just after changing gear but as i accelerate it clears itself, when stopped it drops below 1000 revs an the engine judders a feels like its going to stall an occasionally does stall, also the spedo stops working for a few mins then starts again. i dont know if this is related, i have been told it might be the maff sensor is there a way of testing this,if any other suggestions i would be grateful

 

Look toward the VSS sensor, this would cause what you describe. Only early models had a MAF, later models have a TMAP, which you can't see as it's integral to the inlet manifold.

I guess you were looking for it to clean it?

Martin

 

hi i have recently converted my 1.6 cvh engine mk4 orion to a 1.8 fiesta zetec engine using the fiesta ecu and loom wired into my own loom car starts fine but as soon as the engine warms up and you try to drive it it starts splutering and losses power to the point where it hardly moves when you press the accelerator to the point where it tries to cut out help me please