All Things Mk5 > How to Guides / Troubleshooting
Misfire cylinder 1
pudding:
That is classic bad injector syndrome. It's only noticeable at low injector duty cycles, hence a lumpy idle and possibly a surging/jolting part throttle when hovering between light throttle and overrun.
Your evap fault code might come back if you didn't also change the carbon can. What tends to happen with those is they break up with age and little chunks of carbon can find their way into the N80 valve, jamming it open. If that isn't the case, the carbon chunks might just be saturated with age, either way, you'll need a new can at a rather steep £100ish from VW.
Clarkj93:
--- Quote from: Pudding on July 30, 2021, 07:14:36 pm ---That is classic bad injector syndrome. It's only noticeable at low injector duty cycles, hence a lumpy idle and possibly a surging/jolting part throttle when hovering between light throttle and overrun.
Your evap fault code might come back if you didn't also change the carbon can. What tends to happen with those is they break up with age and little chunks of carbon can find their way into the N80 valve, jamming it open. If that isn't the case, the carbon chunks might just be saturated with age, either way, you'll need a new can at a rather steep £100ish from VW.
--- End quote ---
A new injector it likely is then, are the other 3 likely to go soon as well or can I get away with just changing the one you reckon?
Great news on the carbon cannister as well, another thing to the list :doh:
pudding:
Well, as they say, whilst you're in there! You would give yourself a swift punch to the balls if you changed just one injector, and then another one failed 6 months later :grin: Yes, I know, it's major £££s.....but it's better to do the job just once as intake removal is an utter, utter ball ache.
Give R-Tech a call, they usually have a circulation of refurbished ones which will save you some sheets. I think they are a rather bum tensing £150ish each from VW at the moment.
Yup. Welcome to TFSI ownership :grin: Your car won't be happy until every last penny has been drained from your bank account....ungrateful b1tch!
Clarkj93:
--- Quote from: Pudding on July 30, 2021, 07:57:37 pm ---Well, as they say, whilst you're in there! You would give yourself a swift punch to the balls if you changed just one injector, and then another one failed 6 months later :grin: Yes, I know, it's major £££s.....but it's better to do the job just once as intake removal is an utter, utter ball ache.
Give R-Tech a call, they usually have a circulation of refurbished ones which will save you some sheets. I think they are a rather bum tensing £150ish each from VW at the moment.
Yup. Welcome to TFSI ownership :grin: Your car won't be happy until every last penny has been drained from your bank account....ungrateful b1tch!
--- End quote ---
She has been far too reliable lately, should have known something would pop up! Will give r tech a call, thanks for the info. I can see rough quotes of about 60 quid to get injectors sent off and cleaned/tested. Not sure if this is more of a "service" to keep things running well or something that would fix a injector on its last legs?
pudding:
Always the way!
As far as I know, they just change the filters and pintles and then flow test, but the main guts of the injector remains the same, so yeah, it's always a gamble between brand new lasting 7-8 years, or refurbished lasting, 3 maybe 4?
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