NoobieRover
Member
I replaced the coolant temp sensor bc I thought originally that's what it was but after replacing with new spark plugs and it coming back I don't think it helped. The exhaust doesn't throw out black smoke but does smell different than normal more of a noticible bad smell than it used to can't really explain it though.The EFI ECU controls the fuelling based on the various sensors, testing the workings within the ECU isn't a diy function, but as the EFI coolent/engine temperature sensor is the most common one to fail and will cause over-fueling when engine is up to temperature, this can be tested, resistance data on that and sensors can be found on the LRV8 engine sites (such as mentioned in the post above) and Forums... or replace it.
Just to add: if over-fuelling on a cold start indicated by lots of black smoke then the ECU is/ or maybe faulty, as I found out in my 3.5 days, main Dealers didn't have a replacement so I took it to Lucas and they bench tested and repaired it while I waited, those where the days when Lucas was everywhere but still cost £100 for the repair.
Thanks I will have a read.This article may give you some pointers. I've only skimmed it but it seems well written.
http://www.britishv8.org/articles/rover-14cux-efi.htm
Have you looked into rebuilding or replacing the distributor? I would like to see if that's made a difference on yours. I'm replacing the O2 sensors to see if maybe that will effect it any. If not I'm gonna look into replacing the maf. Maybe I won't have the same results as you when you did yours. Then if that doesn't work I might try high performance plugs instead of the normal onesthat's over fuelling !
you're not wrong