Engine cutting out.

[Tri2Tri]

Went out for a quick run today. Once the engine was warmed up everytime I came to a halt at junctions/lights ect the engine would die. This would happen as the revs fell below 1200 and would just die. Re starting was/is not a problem and would re start on the button but I would have to keep the revs up when standstill to save it dying again. The car is a 4.0 only mods being de catt and clive y piece and an ACT induction kit. All leads,plugs dizzy cap have been replaced a few miles ago and the air filter is clean. Once the engine is cool tick over at idle is fine and does not cut out. Any ideas what could cause this?

[Tri2Tri]

New coil fitted at same time as plugs,leads. Engine does not race and settles down well once off choke. Running rich could be an issue as it is a bit smelly. How could I check/rectify this.

[Tri2Tri]

Temp sensor also replaced for brass one, I beleive there are two though? Rover gauge is next on the list, thanks

[Tri2Tri]

Qbee that is exactly how it is. On coming to a stop yoou need to hold revs to stop it dying. Roundabouts are fun as I experienced this morning ! revs drop as you slow down and cut out. Trying to hold revs is what i'm doing.

[Tri2Tri]

.......And funilly enough as my clutch is on its way out and due replacement on Tuesday I also happen to do a bit of 'clutch bad management' by stalling the car on each occeaasion this dying engine scinario has happened. Looks like your on to something !

[Tri2Tri]

Had a good look in the engine bay, checked leads/connections all was good. The car was running smelly and a little off to be honest but nothing major. What I did notice was a loose Lambda sensor in the near side manifold. This was loose by about half a turn. It appears someone had tried to tighten it in the past with a pair of mole grips as you can see the marks and it is now an oval shape. I finger tightened it back up....I have not got the tool to tighten fully, then took it out for another run. The difference is night and day. Its not smelly....well not AS smelly, and tick over is now smooth rather than lumpy. So what i'm thinking is this....... The Lambda worked loose and tick over became sluggish, on slowing down this had cut the revs. Also on pulling away at junctions I was having to give it some on the throttle to save it stalling....If I didnt it would stall and therefore thinking it was my 'clutch management'. Since tightening the Lambda pulling away is now a dream with no over revving required. Up to now no more cutting out . Soooo loose Lambda appears to have been the source of the problem escalating to stalling issues with clutch management which in turn has given the problem QBee has originally mentioned. So now need to find something to tighten the loose Lambda once and for all hoping that it aint damaged.

[Tri2Tri]

Does the Lucas ECU reset itself everytime you switch engine off? After my repair just wondering if i need to disconnect something to let the ECU reset itself.