Engine won't rev over 3000rpm. Any ideas.

[gromit wedge]

My 350i wont rev past 3000rpm when I drive it but will rev freely when parked. Its like it has a rev limiter fitted.
I had a problem with it misfiring last month and changed most things including plugs, HT leads, coil, ignition module, rotor arm, distributor cap, fuel pump, fuel filters and finally changed the temperature sensor and it sorted the misfire and I didn't really drive it hard so didn't notice the failure to rev freely. It starts perfectly hot and cold and idles really nice. Really need this fixed ASAP.

Any ideas or suggestions.

[gromit wedge]

Pretty sure its not the camshaft as it was running perfectly then one day wouldn't rev. It hasn't been getting worse over a period of time it just stops at approx 3000 rpm and then you have to change gear and it accelerates fine until it hits 3000rpm again.

[gromit wedge]

It missfires a little but the power just dissapears. Parked up it revs over 5000rpm with no problem.

TVRleigh_BBWR said:

What happens when you hit 3k, does it just stop or start to miss / back fire.

[gromit wedge]

I will have to borrow a timing light. Don't have one anymore because all newer cars need a laptop!!!!
I have a replacement distributor so will try fitting that and reset the timing.