Loss of power on motorway
 

While driving on the motorway, suddenly my car lost power, but the engine kept running.
There was nothing I could do about it, downshifting didn't help and putting my foot down didn't make any difference either.
My car slowed down from 120 kmh to just under 90 kmh before the problem went away by itself and I could accelerate again.

Due to lockdown, my car doesn't get much mileage at the moment, and the little it does get is mostly short trips to the shops.
I have since done an ltalian tune-up right before MOT (passed with flying colours and compliments for the clean undercarriage) and haven't had the problem reappear yet.

Is the Italian tune-up a good way to keep the same issue from happening again or should I look for another cause for the loss of power?

It may be best to check for any fault codes before trying to guess what may have happened.

There were no fault codes when it happened, just checked again and still no codes to be seen.

Check fuel filter under back seat for coming loose. Check for water in plenum chamber flooding the ECU.

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Nothing there either: plenum's pretty much dry and my clip's still holding the filter together nicely. It's nothing obvious, it seems to me. Tank is three quarters full, so that's not it either.

Maybe some dodgy fuel (water contamination)? Could be a number of things. If it running OK now, it's a wait and see then!

Cheers, I'll keep an eye on it anyway, might not notice it right away as long as lockdown continues...

I'd consider the possibility of the fuel filter unscrewing itself and the resultant loss of pressure.

Does your car have the orange clip installed on the filter housing?


Brian :D

His post 3 says he has the clip installed.---:D

However it made me wonder if, for some reason, it wasn't really done up tight.---:shrug: