Shredding/Scraping Noise and misfire

[craigaward]

At the weekend i decided to try the unplugged airbox intake to see what the fuss was about. On the way to work today (whilst the noise was great) i appeared to develop a misfire and then a scraping noise which I can only describe as plastic on tarmac/shredding. I quickly put the air intake back however when I accelerated hard the noise was still there. I took it easy for the rest of my journey (around 20 miles) without any problems. Could I have starved the engine of air by limiting the amount of air going in and caused damage? I guess this could just be a coincidence and that it could be anything from suspension to clutch?!?!? Any ideas? I obviously checked under the car at lucnh and nothing is hanging down on the road.

 

[craigaward]

I forgot to say that I had the water pump and aux belt recently changed so i guess that could be slipping? It is only in high revs and mainly in second (as a similar rev in third is approaching silly speeds)

Any thoughts people?

 

[craigaward]

Diagnosis was power steering pump. Thanks for the input guys.

 

[craigaward]

turns out the problem is not fixed. the car appears to make a spinning grinding noise when under load in high revs or when accelerating over bumps. driveshaft perhaps?

 

[craigaward]

maybe a mount or bearing? steering does feel loose

 

[craigaward]

any input would be appreciated

 

[craigaward]

Second diagnosis was gearbox mount hitting the chassis. thanks once again guys!