Although not a CC question/answer but this may be beneficial who have vehicles with engine management systems (computer)
Earlier this week the engine on my van started to lose power this only happened when I turned on the lights (van just coming up too 3 years old, didn’t give 3 year warranty they do now)
Having done all the checks battery and alternator, booked it into local dealer for computer diagnostic, thinking they will find the problem, no problem showed up, lucky for me I was allowed to watch and run though the symptoms again, an apprentice remarked that it some thing to do with the braking electronics. Ooo god how much is that going cost me! Two new brake bulbs or brake light switch the apprentice remarked. It was only two bulbs, it appears that part of electronics sends a signal to the engine to cut power as you are braking even though your not.
Ok it cost me £35 for the check up I can live with that so I thought the forum might benefit from my experience
Len