All Things Mk5 > How to Guides / Troubleshooting
Couple of issues
csrigo:
Just another update on this.
Sent injectors away to r-tech and should have then back tomorrow or Thursday nothing adverse to report so I will update again once refitted etc.
I will be starting another thread on my own update page as I have some good pics of the state of my inlet valves etc...before and after cleaning(shockingly bad prior to clean). I also have decided to do the runner flap delete purely because the manifold is off and I will be going BT at some point soon. May change my throttle pipe to forge or something as it looks tired and pretty weak.
I have the car in bits just now stripped the cam cover and chain housing to fit the new parts. Will have all this on my other page with a description and pics of how I cleaned the valves myself with no shotblasting etc....came up pretty good if I do say so. Oh and I'm heading down south for an R-tech mapping session if all is well...i.e no miss.
I'll update this again once running.
colesey:
I’d be very interested in your impressions on drivability / response after the RFD, even without remapping. I know people tend to do RFD for flow when chasing @400bhp however for those of us with more modest tuning I struggle to see how two sets of throttle valves can help response.
csrigo:
--- Quote from: colesey on November 06, 2018, 04:17:31 pm ---I’d be very interested in your impressions on drivability / response after the RFD, even without remapping. I know people tend to do RFD for flow when chasing @400bhp however for those of us with more modest tuning I struggle to see how two sets of throttle valves can help response.
--- End quote ---
No problem mate I'll keep it updated. Injectors didnt arrive today amd I had drama with the cam chain adjuster bolt..well more specifically the 10mm polydrive used to remove it...
Ordered another should be here tomorrow for a second go....the bolt is fine and i recovered the broken part. Only using this Laser polydrive as my mate in VW is in oz for weeks...what a selfish guy he is eh...another laser number from amazon arriving tmoro...wish me luck and il keep it updated...going a little off topic here apologies.
csrigo:
Right another update on this.
I've just had my injectors reconned/tested however u want to call it from R-Tech. Great job from them again very pleased. I have also just done my intake valve clean and RFD.
Right....i still have the miss at idle which was only on cylinder 2. It's now doing it on cylinder 3 randomly as well. I'm going to retake all the packs out and change them all as weird as it is I think I've fitted swapped two guff ones...twice. I hope it's my stupidity that's doing this as it's not the injectors or compression issue.....gotta be these crappy packs which are relatively new... I know packs are notorious but I've swapped them before (cylinder to cylinder not new) with no change...new plugs as well :thinking:...gotta be the packs now they have been manhandled about.
Side note the car runs great and you never feel or log a miss when under load only at idle.
Done my valve clean, RFD and sorted a small air leak.. car feels amazing...whether it's the valve clean, RFD or both it's made a hell of a difference. I would highly recommend this if a lot of miles on the car.
pudding:
Is it missing/lumpy all of the time, or just when cold? RFD does apparently cause cold start roughness, but should smooth out when hot.
Glad to hear it's driving better :happy2:
Keep us posted on the misfire. I'm not convinced cleaning the injectors does a lot personally, and it's certainly not a long term fix. I'd be interested to know if R-Tech test them properly with varying PWMs across the full pressure range of 45 - 130 bar. If not, it's kinda pointless imo.
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