Rough idle when warm?

[gazareth]

its on the right side of the inlet manifold near front of engine. it has a pipe and an electrical connector going to it. just un plug it when engine warmed up and see if it improves things.

[pullafacial]

Also, bearing in mind she runs lovely when cold, is there anything else I should be checking?

Just to clarify symptoms:

Rough idle when warm (sometimes cuts out)
Bad mpg
When warm, revs seem to "hang on" a bit before dropping.

I'm no mechanic but I'm convinced it's running on choke (or equivalent) all the time.
How does the engine know when it's warmed up to adjust fuelling etc?

Thanks again

[gazareth]

it goes by the coolant temperature. but try unplugging fifth injector first then it will give you an idea where to look next. it might not be cutting out when it should and pumping fuel in even after engine warm up.

[pullafacial]

Ok thanks,

I'll have a try tomorrow and let you know how I get on

[Gambit]

5th injector only runs on cold startup so wont be your issue. You need to get the CO% setup.

Also when fully warmed up and idling. Spray wd40 down round injectors if engine note changes your seals are shagged and its drawing in unmetered air

[gazareth]

5th injector only runs on cold startup so wont be your issue. You need to get the CO% setup.

Also when fully warmed up and idling. Spray wd40 down round injectors if engine note changes your seals are shagged and its drawing in unmetered air

5th injectors MEANT to only run on cold starts. there is a chance it could be spraying constantly due to a fault in the wiring. so lets not dismiss anything. very easy first test anyway.

[pullafacial]

Yeah that would make sense to me.
Is the blue connector at the top, front, right hand side of the injector?

Also, would someone be so kind as to post a picture highlighting where I would need to spray wd40?

Phrases like inlet manifold etc are wasted on me as mechanical knowledge could be compared to that of a turkey!

Thanks again

[Gambit]

aye blue connector on very far side of engine, just disconnect it.

as for WD40 - just follow the 4 - injector lines from the top of the airbox down to the engine, and then spray the wd40 down in where the injectors sit

you have 7 lines in total leaving the airbox
4 for injectors
2 for warm up regulator (on side of head below distributor)
1 for cold start valve

[pullafacial]

Thanks for your help so far guys.
Today I disconnected the fifth injector before coming to work.
It wouldn't start which I presume means it's coming on when it should.
So I reconnected it and stopped half way to work and disconnected it again.
It seemed to run nicer although could be my imagination as when I arrived at work (6 miles) it had started to run lumpy again.

Back to the drawing board, or could I have two separate issues?!?

[Gambit]

wd40 around the injectors when you get into work