After an excellent day sprinting at North Weald today where the car ran faultlessly, I noticed on the drive home that the rev limiter is now cutting in on the VHPD at 5500rpm. Any clues why this might be?
The car is booked in for an MOT tomorrow so I will see if the garage can take a look, but thought I would see if I could get any ideas first. Apart from the rather premature rev limiter, everything seems fine.
Thanks!
Neal.
Do a search on here mate
Ah yes. Another little Lotus quirk
Thanks,
Neal.
Probably the commonest engine related “fault”
check this out clicky
Still don’t know what caused my temporary rev limiter. The garage had a look but couldn’t find anything obviously amiss. The car has since done a Walshy activity day with no further problems and seems to be running fine again now.
Hopefully it was just a one-off glitch with the ECU!
Neal.
Well my 5500 rev limit problem has returned with a vengence. It is pretty much doing it all the time now 
The car is booked back into the garage for Monday to try and resolve it and my research has shown the following possible causes:
Faulty wheel speed sensor
Plug leads
Coil pack
Vacuum hose
Anything else I should add to the list?
I don’t think it is a genuine misfire as I have certainly not noticed one. The car is running the original 190 ECU.
Thanks!
Neal.
Mine actually turned about to be the cable from wheel sensor to the ECU which had frayed where it passes through the bulkhead.
Good luck.
I’ll spare you the waffle, replace your crankshaft sensor , I had a consistent and agressive cut out at 7000…, 15 minute fix with a ScamBay £15 pattern part … so much cheaper than a new ECU… if you would like the full story please dont hesitate to drop me a note. It took 18months on and off to find the problem, I was determined to find it myself. K series of course… why buy a perfectly good English car and put Jap or German rubbish in it… we all know original is best :0)
I think you answered your own question there bud 
It’s great that some guys keep 'em standard and great that some are modded beyond comprehension; different strokes for different folks.
You are KingK and I claim my £5!!
In all seriousness, like Ben says, when a K series can give 300-600 reliable bhp, then we may see the error of our ways. Until then…