All Things Mk5 > How to Guides / Troubleshooting
Spark plug gaps
AJP:
--- Quote from: Tfsi_Mike on August 29, 2016, 05:25:51 pm ---Alex uses them, I believe. I'm sure mine went there for checking
--- End quote ---
Thanks mate. I'll check them out
r5gtt:
--- Quote from: AJP on August 29, 2016, 04:37:07 pm ---
--- Quote from: r5gtt on August 29, 2016, 04:33:24 pm ---
--- Quote from: AJP on August 29, 2016, 03:39:19 pm ---
--- Quote from: r5gtt on August 29, 2016, 03:00:58 pm ---Want to share this with you.
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
--- End quote ---
Hmm, interesting. Thanks for that mate. I wonder if there's any value in getting these refurbed. Might be a better approach to replacing odd injectors and pretty much waiting for the next to fail, and it'd in theory be as good as 4 new injectors. Not sure on prices for refurb. Will have a read up.
Of course, it's a bit of a punt to assume it is the injector causing the misfires, although it seems much more likely to be that than anything else at this stage.
--- End quote ---
If you're really thinking of refurbishing them then maybe better off buying a new set as I don't think it will be cheap tbh.
--- End quote ---
Surprisingly, it's not too bad. About 60 quid for a set of four, unless I'm missing something. If you go on the website it tells you the process, and it seems to go a fair bit further than just ultrasonic cleaning.
Considering the price of a new injector, this option is miles cheaper.
--- End quote ---
Sounds a fair price :happy2: maybe choose that option over new :grin:
pudding:
--- Quote from: AJP on August 28, 2016, 05:39:26 pm ---
--- Quote from: r5gtt on August 28, 2016, 05:23:32 pm ---Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.
--- End quote ---
I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
--- End quote ---
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
AJP:
--- Quote from: Pudding on August 30, 2016, 01:27:27 pm ---
--- Quote from: AJP on August 28, 2016, 05:39:26 pm ---
--- Quote from: r5gtt on August 28, 2016, 05:23:32 pm ---Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.
--- End quote ---
I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
--- End quote ---
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
--- End quote ---
Thanks mate. I'm hoping to catch up with Steve again soon, see what he thinks about the idea of getting a full set of refurbed injectors in.
I've decided not to do the trip to Wales, there just seems like too much to risk, and it buys me a bit of time. Which is a shame because the weather should have been good; the next I can get down is October and it starts getting a bit fresh on the coast!
Anyway, no misfires today.
pudding:
--- Quote from: AJP on August 30, 2016, 02:01:39 pm ---
--- Quote from: Pudding on August 30, 2016, 01:27:27 pm ---
--- Quote from: AJP on August 28, 2016, 05:39:26 pm ---
--- Quote from: r5gtt on August 28, 2016, 05:23:32 pm ---Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.
--- End quote ---
I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
--- End quote ---
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
--- End quote ---
Thanks mate. I'm hoping to catch up with Steve again soon, see what he thinks about the idea of getting a full set of refurbed injectors in.
I've decided not to do the trip to Wales, there just seems like too much to risk, and it buys me a bit of time. Which is a shame because the weather should have been good; the next I can get down is October and it starts getting a bit fresh on the coast!
Anyway, no misfires today.
--- End quote ---
Yeah it's a bit risky! The most damaging detonation can't usually be heard because it's higher up the revs, and then it's usually too late. It would be better if the injector failed completely because no fuel = nothing to burn and therefore no det. But they kind of half work and cause a very lean burn, which is dangerous to your engine's health!
Given how common this problem is, I'd definitely be sticking some new ones or refurbed ones in asap!
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