I posted a message a while ago about a 1999 Ford Focus 1.6 Zetec with
an intermittent misfiring problem.
The misfire usually occurs during acceleration in 4th or 5th gear or
when accelerating hard in lower gears. Most of the time the engine
idles fine however on two occasions the misfiring has been pretty
severe and the engine has stalled whilst idling.
Two seperate garages have looked at the car (one a Ford Dealer) and no
obvious problem has been found by diagnostics. The confusing thing is
that when the plugs and coil were changed, the problem disappeared
completely for a while but returned very slowly.
It seems as though there is a problem which is having a go at the
ignition system. Any ideas? Anyone had a similar problem?
Thanks for any words of wisdom!