5500rpm and after?

[supercopa]

I need help, my engine is very strong under 5500rpm and then there is something which seems taking it out of breathing.
It's always at 5500rpm exactly that it begins to hurt a wall, climbing slowly then to 7000rpm

what should I do? do you have any idea? thanks

[dvs_dave]

Change the fuel filter.

[supercopa]

thanks but has only 5000 miles and seems quite hard to change it isn't it?

something else : impossible to start when cold if not opening throttle a little

Edited by supercopa on Saturday 20th June 12:09

[Funky Jo]

On mine it is from 5ooo rpm onwards where it moves up fastest ... but this was different when the cats where gone
Your catalysts might have gone (partially melted and closed), not giving her enough room to breath out ?

Edited by Funky Jo on Saturday 20th June 19:43

[supercopa]

found something strange : crank sensor is ok on diag software but when I put it out it seems like it was wrecked with sandpaper at the bottom with small chips of metal glued to it ???

couldit be the cause of my troubles??

[supercopa]

far better now, flies like the wind !!!

[s3fella]

What did you do?

[supercopa]

only cleaned the crank sensor

[asrovak]

supercopa said:

only cleaned the crank sensor

Hi pal,

The crank sensor can do all sorts of weird stuff, from non starting right through to engine stutter. glad you fixed it, will be in touch soon.

S