misfire cylinder 1........Cupra

[banksy21]

Hi guys i need i little help regarding my mk2 cupra. I have developed a misfire on cylinder 1, there was alot of water on the coil pack/spark plug in cylinder 2 and 4 i've cleaned all of them up and swapped them around but there is still a misfire on cylinder 1. any help would be great.

 

[kazand]

Have you checked a Badger hasn't chewed through a lead?

 

[banksy21]

Have you checked a Badger hasn't chewed through a lead?

haha

 

[Joshkcupra]

My hpfp was leaking and causing a misfire in cylinder 1

 

[Marshall]

If you've changed the plug and coil to a different cylinder and the misfire has stayed on cylinder 1 then I'd suspect an injector.

 

[WeeG]

Injector fail sadly

 

[banksy21]

My hpfp was leaking and causing a misfire in cylinder 1

I thought you where getting misfires on all cylinders.

Im 60-70 misfires a minute on idle

 

[Joshkcupra]

I thought you where getting misfires on all cylinders.

Im 60-70 misfires a minute on idle

It was when injectors 3/4 were fooked.. But after they were replaced it was predominantly cylinder 1. It's more than likely a snagged injector

 

[goldie87]

I had a similar problem last week.. car started to misfire, bringing up the PO301 cylinder 1 misfire code.. took the coilpack out of cylinder 1 and it was rusted to hell :

I also found that the area was filled with water, drained it out and replaced the coil pack and it sorted my problem out.

Just not sure why it was filled with water in the first place??

 

[banksy21]

Yea i had the same but ive swapped the coils and spark plugs and theres still a misfire. So i think its injector related.

 

[jake]

they fill with water due to the bonnet leaking in rain water

 

[banksy21]

is this the injector i need?
http://www.ebay.co.uk/itm/06F906036...arts_Vehicles_CarParts_SM&hash=item1e94a4285c

 

[Tfsi_Mike]

I had the same issue. Moving coils & plugs around didnt move the missfire. Steadily counted missfires at idle. Could hear the odd hicuup from the exhaust at idle. gradually got worse.

New injector and it was right spot on then. Mine was cylinder 3

 

[banksy21]

i hope its just an injector tbh mike, ive been hearing horror stories of melted pistons and destroyed engines due to misfires.

going do a compression test first just incase any damage has been done.

does anybody know the ideal compression for each cylinder.

 

[banksy21]

ALL SORTED YAYYYYY.

compression test came back all clear
around 160+ psi on all cylinders.

took the inlet manifold off cleaned all valves and flaps also cleaned all injector plugs, removed all injectors cleaned them up using carb cleaner then resealed them.

put it all back together

jobs a gud un no more misfires.

 

[Dan FR]

So the million dollar question is.....

What was the actual cause? how much build up did you have on the valves?

 

[Joshkcupra]

Was probably the injector coated in **** like mine was!

 

[banksy21]

the injector plug on cylinder 1 was rusty. so cleaned it all off.

the valves were not that dirty tbh, not as bad a some cars ive seen, i think its been done before.

 

[Seat69]

Hi , am sure I seen something to dove water in coil 1 even afer replaced coil & removed bonnet insulation to do with bonnet strip can anyone hlp plz