New ECU, but lumpy low revs-advise please

[madmacmcmad]

Gents
After much messing, I now have a new ECU. But at low revs it is lumpy, almost like it's firing on 5 not 6.
Does the throttle pot need setting ? If yes, is there an easy way without plugging in ?
I have put some injector cleaning stuff in the tank thinking that it might need a little clean as the fuel filter insert was inserted the wrong way round. It had been like this for 10Kmiles, so effectively had no fuel filter. The new upgraded pump had sufficient suction to suck the insert up against the filter outlet and starving the engine of fuel. Took a while to find that one !!!!

Cheers
Andy

[yellowshed]

Andy,

If you can get the car round to us, I'll happily give the ECU a once-over to check the status of the adaptives and throttle-pot setting.

YellowShed

[nobleguy]

Not sure if your symptoms are the same as mine, but I had strange pauses at low revs giving it the beans - turns out it was a corroded coil.

[madmacmcmad]

Just had an MOT and took the opportunity to check emmissions on both banks and it looks like I have a leak somewhere. This would surely cause the rough running on idle. I have a horrid suspicion that I am shortly to buy the strengthened manifold for the rear bank. Already done on the forward bank.

[madmacmcmad]

Yep
Big split in the rear exhaust manifold.
I very glad this lot has happened before LeMans !