Fault codes - local shop can't solve

[suzublu]

Originally Posted by grivas

It looks OK not oily or excessively sooty to me, but then without testing it, it
would be impossible to tell if it works as it should.
I would concentrate on the 'orange clip' hypothesis as mentioned earlier because if the in-tank filter/fuel pump is showing signs of separation into the two parts then you will need to place a clip on these to prevent this from happening otherwise the resulting drop in fuel pressure will cause all sorts of driveability issues.
Do google a search under Rover 75 fabled 'orange-clip' or FCC., see what you can make of it, if you haven't got a clip fitted, then fit one. If this sorts things out, OK, if not then check the purge valve/charcoal canister, and yes spray the electrical connector with contact spray, good luck

Post 18 mentions the orange clip fitted
Just to add, engine light on is usually attributed to lambda and associated wiring problem on a N/A 1.8
Also plug gaps should be .75mm and not the stated 1.0mm

[EVS]

Just to update for now: used contact spray on the charcoal canister plug. Also went and checked the orange clip again just in case, and it's still on there holding everything together nicely.

I've then cleared the codes again and so far, they're not back yet. Last time it took a little while for them to return so I'm unsure whether it's sorted now or I just haven't driven enough since, but fingers crossed the light stays off...
Either way, to be continued

[EVS]

Alas, no solution yet.
After a few motorway runs, the light's come up again.
Again P0445 and P0420.

Is there a way I can check whether the canister works as it should or should I just replace it?
Or is there maybe something else going on?

[SD1too]

Is your engine still hiccuping and stuttering Erik?

Sometimes generic code readers give spurious results; I'm thinking of P0445. Have you tried unplugging the purge control valve to see if that code changes? It's not a fault I have ever experienced on this forum.

Regarding P0420, could you get your emissions checked to verify that? The engine may be reporting catalytic converter inefficiency because there is a fuelling/ignition fault which may be the cause of the erratic running.

Simon

[EVS]

No, the hiccups disappeared after I changed fuel stations and they haven't returned since. When idling, however, the rev counter dances slightly. I'm guessing that could be related to the purge valve fault code?
As for the fault codes: they show up on TOAF, so I'm hoping they're accurate, otherwise what's the point of TOAF?

I'll have a look around for a place that can test emissions. Not too many independent shops have that option around here.

[SD1too]

Originally Posted by EVS

I'll have a look around for a place that can test emissions. Not too many independent shops have that option around here.

Do you not have an equivalent of our MOT test which measures emissions?

Simon

[EVS]

We have those, yes, mandatory every year but the shops themselves don't do those.
I believe in the UK MOT centres also carry out repairs etc, just like normal shops?
Over here, our equivalent of the MOT centre does only that: they only check whether your car is safe/up to code. If something's off, you get failed and need to take your car to the shop, have it fixed, then take it back to the MOT centre.

My MOT is still valid until end of January so can't take it there yet either.

Edited to add: many local shops don't invest in the emissions equipment from an investment point of view: they often think it costs too much.

[EVS]

Thought I'd provide an update just in case anyone would be wondering.
Ended up finding a local Jaguar Land Rover garage not too far from me, who still employ someone with Rover knowledge.
They couldn't really find any visible faults or leaks, so they reprogrammed the stepper motor of the throttle body since that seemed to be where the problems originated. That seems to have sorted it, now over 1000 km without any issue.

[hogweed]

Originally Posted by EVS

they reprogrammed the stepper motor of the throttle body since that seemed to be where the problems originated.

This is very vague, and not terribly helpful, but the stepper motor is always going out of spec on my TF, which as far as I know has the same engine... maybe there's an issue with them, and worth replacing?

[EVS]

Originally Posted by hogweed

This is very vague, and not terribly helpful, but the stepper motor is always going out of spec on my TF, which as far as I know has the same engine... maybe there's an issue with them, and worth replacing?

For now I'm just going to leave things as they are, see how it goes. So far, the reprogramming seems to have done the job so no need to replace it in my eyes. If my car starts having the same issue again, though, I'll be sure to let the shop know.