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[Migv6 le Frog Fan]

I have had about half a gallon of petrol in a can in the boot of the C1 for about 6 months.
Sunday morning before leaving work I decided to tip it in the tank. There was aready approx. a couple of gallons already in the tank.
When I left work I didnt get more than a mile or so before it started misfiring and kangarooing. Nearly didnt make it home as it cut it a couple of times and was very reluctant to restart.
Not being a great believer in coincidence I assumed the half gallon must have gone off, so filled a couple of gallon cans with fresh petrol and put that in hoping it might then sort itself out.
It hasnt had any effect at all. Still very hard to start and runs as rough as a Badgers arse.
Have plugged my code reader in and got misfire cylinder three (it only has three).
Just because its a five minute job I swapped the stick coils between 1 and 3 but the code stayed at number three.
Only thing I can think of is a problem with number three injector ?
Any more intelligent thoughts more than welcome.

[countrywoman]

Worth checking compression first. Mum put some E10 in her Seat and it blocked the fuel filter with the same results but if you have a code for no3 then doubt its a blocked filter.

[Viral_Jim]

Fuel filter would be my first choice (must cost about 60p on one of those.

Also, how long did you run it for after you put the fresh in? May not have worked it's way through yet? 

Edit: CW beat me to it 

[Migv6 le Frog Fan]

Not even sure it has a fuel filter. Seen mention of filters in the top of the injectors. 
Ive ran it three or four times for five to ten minutes with no improvement.

Edit. apparently no filter that can be changed. Built into the pump in the tank.

[Viral_Jim]

Going back to simple things, have you pulled/inspected/swapped the spark plugs over to see if the misfire moves?

A quick Google indicates they have an issue with oil deposits on plugs. Maybe slightly crappy fuel just tipped a minor problem over into a misfire.

[Migv6 le Frog Fan]

Not yet. Rain and hospital visit stopped play today. Will swap plugs tomorrow. 

[cam.in.head]

i seem to remember there is a filter but its a strange style rather than just an inline cylinder type.
worth replacing it anyway.
how easy is it to change an injector on those. if you have already tried the coil and then a plug its the last port of call to see if the misfire stays on number 3.
after that its checking wiring ,ecu,live data etc

[Migv6 le Frog Fan]

Injectors look pretty easy to change, so that will probably be the next thing after swapping the plugs.

[Migv6 le Frog Fan]

Plugs swapped over but code remains at cylinder 3.
Now removed injctors and will attempt to rig something up so I can operate them and clean them.
Pretty sure they are 12v, so hopefully not too difficult.

[Viral_Jim]

Plugs swapped over but code remains at cylinder 3.
Now removed injctors and will attempt to rig something up so I can operate them and clean them.
Pretty sure they are 12v, so hopefully not too difficult.

Looking on eBay it seems you can get a whole (used) injector rail plus three injectors for less than £50, is it worth putting the effort into running and cleaning them, vs getting a new rail and keeping the two known good injectors you have as spares?

** Linky **

All a question of £££ vs CBA I guess 

[Marks DTM Calib]

Just move the injector to test first, try not to introduce more unknowns, it might well be clogged, modern petrol injection setups don't have filters and if it was the filter, it would result in multiple misfires and would likely idle ok (when fuel demand is low), and not rev up. 

[Marks DTM Calib]

Or just torch it, it is a cylinder short of tolerable already 

[Migv6 le Frog Fan]

Thats just mean. 

Just read the last few posts - but, I have taken the injectors out today. I know they are 12v so connected a couple of wires that so I could quickly touch one on/ off on a battery while blowing isopropyl down through the injectors (just mouth pressure though).
Reassembled and it ran fine for maybe 30 seconds before running rough again.
So.........buy some carb or brake cleaner and blow through them under pressure or buy a set from a breaker a half hours drive away for £30 ?
Not sure which way to go at the moment.
It could still be that theres contaminated fuel in the tank, and when that got pumped up to the injectors when they were refitted, it started running rough again.
Still getting cylinder three misfire code, so will  swap injectors tomorrow to see if the code moves with them.
Should have thought of that when I had them out today. 

[cam.in.head]

you could always add an extra inline filter in the supply line in a more accesible place but sounds like you are on the right track now

[Migv6 le Frog Fan]

Just went out swapped no1 and no3 injectors to see if the code followed the injector.
Started it up and it runs perfectly. Drove it for a couple of miles and its running just as it should.
No EML and no codes.
Can only assume the manky petrol has worked its way through, or now been well enough mixed with the fresh stuff.