Not revving out

[trace A]

Hi all
Went out for a blast at the weekend and cars running nice apart from doesn’t want to rev over about 4.5 k . No missing at all and foots buried in the carpet although it don’t want to tick over sometimes when I restart after it’s hot but levels out fine after fettling the throttle . Just wondered if the cable perhaps needs adjustment .
Cheers

[eesbad]

HT leads ok? I had a broken lead that allowed only a weak spark to No3 which stopped it revving over 5k...

[Classic Chim]

Or coil breaking down from heat and high revs so poor spark above 4000.
Any number of chances so a few working spares to try out would be my preferred way forward.

[KKson]

Had this on mine last week. I swapped out the dissy but suspect it was the ignition module.

[adam quantrill]

Does it rev over 4500 in first? If so unlikely to be the throttle.

Also apart from above suggestions, stuck advance weights in the dizzy.

Or the throttle pot.

[trace A]

Thanks everyone for the replies
When I had the car I had a few running issues so changed leads ,plugs cts ,ignition module cap, rotor plus lubed dizzy and replaced breathers. Cured most things but still had misfire which turned to be new crap rotor arm so replaced with old red one and all is now good apart from just can’t get it to rev out . Rotor had rivet in it by the way avoid them if you can . I tried bp6 and bp7 plugs now running bp7 and have put old leads back on has were good quality and I replaced coil with Powerspark viper still have old Bosch one. Rotor arm pulled off spindle quite easy when I checked the other day .

Edited by trace A on Thursday 28th February 17:33

Edited by trace A on Thursday 28th February 17:38

[adam quantrill]

Looks like you have already tried most of the above, you could try going back to the Bosc coil (nothing wrong with them).

Otherwise check the timing - at idle, and the mech advance coming on at 2500 rpm +.

Bear in mind that the timing marks on the pulley can sometimes be off!

[KKson]

A few years ago I had mis-fire issues on the 350i. I bought new coil, HT leads and dissy from your new coil supplier. In less than 7 weeks all three new items failed, so just because something is new doesn't mean it's working correctly.

All issues I've had with my Wedges engine wise have turned out to be electrical issues. Touch wood so far I've not had any issues with the actual EFi system. Most of mine have been ignition amp/HT leads and coil, but also a few earth issues and knackered old wiring feeding between the coil and dissy.