Loss of acceleration

2015 VAUXHALL OMEGA
75,000 MILES • 2.0L • 2WD • MANUAL
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RICKYMARR
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Loss of acceleration all of a sudden, car still runs, no lights on dash, changed air filter, and oil change, only thing i haven't changed so far is fuel filter.

Cars a Vauxhall insignia 2lt diesel ecoflex.

normally 0-60 around 11 seconds, right now youre lucky to reach 60 in 30-50 seconds
Oct 9, 2021 at 3:14 AM
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KASEKENNY
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Unfortunately, we don't have a manual on this vehicle as it is not offered here in the USA, but a diesel engine is pretty basic and the same no matter where it is.

So here are a couple guides that will help with this issue. Clearly this is on a gas engine, but most all the issues are the same.

https://www.2carpros.com/articles/engine-has-low-power-output

https://youtu.be/U1RoG3I-Oww

More than likely you have an issue with the amount of air coming into the engine, the turbo, or a fuel issue.

Assuming this is a turbo engine which it appears it is.

I would suggest checking the charged air system for air leaks. This would be from the air filter to the turbo and make sure there are no leaks or restrictions. Then the charged side is from the turbo to the intake manifold.

I suspect you have a leak in this side of the intake that is not suppling the proper amount of air.

The way to check this is you need to put compressed air to the tubing from the turbo to the intake and use soapy water and spray down all the connection points looking for bubbles.

Please run through this and let me know what you find. Thanks
Oct 9, 2021 at 9:28 AM