Good day,
Ford fokus 99 1.8l manual 170K km developed interruptions during acceleration only when up to full temperature. Irregular. Like the engine misfires. No strange noises, no flashing lights. Idles perfect. Had a mistake for the upper lambda sensor. Started doing more after replacement. Plugs and cables - no change.
Why the down vote, @nick-vel? A scan would give you a starting point to narrow down the possible causes of the problem. And they're free at most auto parts stores.
Sorry for the downvote. "Had a mistake for the upper lambda sensor. Started doing more after replacement." Implys that codes have been red
Please post all the codes here, thanks. No matter red or green.
3 mechanics test it there are no codes
@Nik-vel So how did you conclude that there was a "mistake" for "Had a mistake for the upper lambda sensor"?
The first scan showed lambda sensor, so it got changed and the code cleaned. 2 weeks later it havent appeared again for the second and 3rd scan which show no codes.
When an ignition coil is failing sometimes it'll intermittently short out internally when it gets hot.
First, scan it for codes.
