MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: fahim4094 on December 12, 2019, 02:58:58 pm
-
HI guys
I’ve got a edition 30 dsg with 118k on the clock. Recently I’ve been experiencing rough idle with my gti (stage2+ rtech) - rpm not moving up or down - just feels jerky/lumpy in idle
Ive changed:
-pcv valve
-Cam follower
-Oil service/ sump clean - new pick up pipe - oil filter (quantum 5w-40) always used never given any problems before
-Ngk spark plugs
-R8 coil packs
-Main thermostat
-Fuel filter
Running Tesco momentum
But still facing rough idle. - any idea what could be the cause of this
-
Is likely the injectors needing cleaning. Try running a tin of Bg44k through to see if things improve.
-
my rough idle was caused by vac leak from coolant vac pipe below inlet manifold
-
I’ve scanned the car, these are the errors that are coming up
P0300- Random/multiple cylinder misfire detected
P0303 - Cylinders 3 misfire detected
P1602 - power supply terminal 30 voltage too low
I’ve reset the codes, drove it around, errors have not come back, but still jerky/lumpy idle
-
I would guess could it be coil pack cylinder 3
-
HI @Dude2016 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=15147)
I've already replaced all 4 coil packs
-
Errors take time/many occurrences to reappear depending on their nature
Firstly unplug the MAF and see if it improves. If it does you likely have some form of air/vacuum leak
If that doesn't help, then you probably have a dead/dying injector. Use VCDS to log the misfires at idle and tell us how many you are getting per minute on each cylinder
-
Injectors. Common problem. Mine needed replacing at 80K. Always at idle on the lowest duty cycle. Usually smoothes out at higher rail pressures as it overcomes the blockage/lazy pintle.
-
HI @Dude2016 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=15147)
I've already replaced all 4 coil packs
Have you replaced the plugs too?
-
Injectors. Common problem. Mine needed replacing at 80K. Always at idle on the lowest duty cycle. Usually smoothes out at higher rail pressures as it overcomes the blockage/lazy pintle.
Exactly this, I’m experiencing a misfire on idle at the moment but disappears when running, I’m in on Friday at r-tech for injector cleaning/replace if necessary! I’ve changed coils, plugs, etc, so injectors are the last thing to be done to hopefully cure the problem! My cars on 59k also!
-
@TechyTom (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=55235) As soon as I had experienced the rough idling, I booked it in the next day to have all the above replaced, so yes, I have replaced the spark plugs.
@Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) I believe it could also be injector related problems - having the front end stripped hopefully after new years.
@colesey (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1819) thanks for the suggestion, I need to try this I've heard a lot of good reviews about this.
It's really annoying, I start the car in the morning (Cold Start) struggles to turn over (sometimes) and starts to jerk in idle and feels like it wants to cut out, it is also very rattly from the front almost seems as the chain wants to snap - but after I let it warm up for about 2-3mins - it seems normal with a little jerkiness/lumpy idle - and the chain doesn't rattle like crazy - but you can hear it, it's not revving normal - car drives fine and still pulls very good with this problem. I managed to do a round trip of 130miles with wynns injector cleaner and Tesco 99 - but the hasn't helped.
I will keep you guys updated after the front has been stripped.
-
Useful thread... I have the same issue on my BWA at 80k, although it sounds like yours is worse.
It's been doing it since I got the car at 70k but it's not got any better/worse since then and no VCDS codes either. Like you, I replaced the sparks, coils and PCV valve thinking it was one of those. It wasn't.
I have put a couple of bottles of Redex through it during that time, hasn't made any difference, although it does seem a bit better on 97/98 than on 95, and it's always better after a good Italian tune-up :)
I'll try the BG44K as suggested by colesey earlier. Failing that I'll be looking at changing injectors as well I guess.
Good luck with yours.
-
@Ytee (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=52160) When I bought the car a month ago, it was perfect - had a new turbo, stacks of receipt - drove it around for 2 weeks problem free - now problems are coming out left, right and center lool (GTI LIFE). Mine started off not that bad, now it's just getting worse.
I don't think Redex is that good. I was reading through injector cleaner reviews - someone did mention that Wynns Injector Cleaner helped with their car.
-
The best inj cleaner is Forte
-
@titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462) would a vac Leak cause the car to struggle on start up - cold or warm
-
Check your brake booster hoses, even the long one along the back top leading to the brake reservoir. I had aame issue, rough ide and missfires. Changed plugs/coils no luck. Turned out the plastic brake booster hoses were cracked (all of em). As for the missfires, i cleaned the hell out my intake valves several times to clear the gunk and walla everything went smooth.
Culprit was brake booster hoses for the rough ide/vacuum leak and thick gunk causing missfires.
Hope thia helps.
Sent from my iPhone using Tapatalk
-
yes because the mixture is altering
-
What’s the update? I’m curious
Sent from my iPhone using Tapatalk
-
Winter is the worst time of year for cold starting as the engine needs a bucket load of fuel to run smoothly. Replace the injectors and all will be well again.
The horrific rattling and chuntering is what these engines do when they don't get enough fuel and/or oil pressure at startup. Has the oil pickup been cleaned/replaced?
-
Hi
@St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276) no update yet, car is still the same, fingers crossed my car should be in the garage after new years to get stripped to see what the problem is.
@titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462) thanks for the reply
@Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) my cousin said the same thing to me, apparently stage 2 cars don't like the winter
One more thing guys can I still drive the car as I use it daily for work (around trip 14miles)
-
Hi
@St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276) no update yet, car is still the same, fingers crossed my car should be in the garage after new years to get stripped to see what the problem is.
@titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462) thanks for the reply
@Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) my cousin said the same thing to me, apparently stage 2 cars don't like the winter
One more thing guys can I still drive the car as I use it daily for work (a round trip of 14miles)
-
Yeah it will be fine. Probably won't be optimal but if the engine feels like it's hesitating in boost, ease off the gas pedal.
-
Hi guys
My garage checked my car - couldn't find any issues with pipes or leaks - he's saying most likely it's the carbon build up and injectors.
I was going to get injectors from awesomegti (Bosch Audi S3 / Golf R / ED30 2.0TFSI Injector (Genuine Part Number: 06F906036F0
I know someone who works for vw and he can get genuine injectors for my edition 30 for a good price, but he said they are not Bosch ones.
I am running Rtech stage 2+ should I get the original ones from VW or Bosch ones from awesomeGTI
-
Hi guys
My garage checked my car - couldn't find any issues with pipes or leaks - he's saying most likely it's the carbon build up and injectors.
I was going to get injectors from awesomegti (Bosch Audi S3 / Golf R / ED30 2.0TFSI Injector (Genuine Part Number: 06F906036F0
I know someone who works for vw and he can get genuine injectors for my edition 30 for a good price, but he said they are not Bosch ones.
I am running Rtech stage 2+ should I get the original ones from VW or Bosch ones from awesomeGTI
In the meantime, why don’t you do a simple diy carbon cleaning as I mentioned earlier. It will help alot. Depending how thick ur carbon buildup is. Have u ever done any valve cleaning before?
Sent from my iPhone using Tapatalk
-
Hi guys
My garage checked my car - couldn't find any issues with pipes or leaks - he's saying most likely it's the carbon build up and injectors.
I was going to get injectors from awesomegti (Bosch Audi S3 / Golf R / ED30 2.0TFSI Injector (Genuine Part Number: 06F906036F0
I know someone who works for vw and he can get genuine injectors for my edition 30 for a good price, but he said they are not Bosch ones.
I am running Rtech stage 2+ should I get the original ones from VW or Bosch ones from awesomeGTI
In the meantime, why don’t you do a simple diy carbon cleaning as I mentioned earlier. It will help alot. Depending how thick ur carbon buildup is. Have u ever done any valve cleaning before?
Sent from my iPhone using Tapatalk
Also, put in some quality injector cleaners like amsoil PI to clear ur clogged injectors. Im pretty sure ur injectors are fine its just clogged up. This is what i did, took about 2 bottles of use and everything went smooth. Just a thought for u instead of changing something that is not broken.
Sent from my iPhone using Tapatalk
-
HI @St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276)
I have already used Wynn's Injector cleaner with a full tank, that didn't help, then I used Red Line SI-1 Complete Fuel System Cleaner Treatment with another full tank, that has not helped.
And I have never done DIY carbon cleaning myself, I did want to do this, but I have not got time
-
HI @St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276)
I have already used Wynn's Injector cleaner with a full tank, that didn't help, then I used Red Line SI-1 Complete Fuel System Cleaner Treatment with another full tank, that has not helped.
I assume u used it twice only with 2 dif products? It takes several pumps to disperse the clogged residue throughout the whole fuel system up to the tip of the injectors. In my previous case it took me several cycles to the point I forgot how many times. IMHO i swear on amsoil PI, i feel difference after maybe 3 bottles. The potency in that stuff is powerful compared to many other products out there. As well as amsoil powerfoam to clean intake valves, alternative to seafoam i guess. Bare in mine its a 14year old car that only started cleaning last year.
How old is your car btw?
Sent from my iPhone using Tapatalk
-
HI @St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276)
I'll give that a try is it this one https://www.ebay.co.uk/itm/AMSOIL-PI-Performance-Improver-Fuel-System-Cleaner-Petrol-Additive-355ml/283652190077?hash=item420afcef7d:g:j5QAAOSwtVhdsHMc
My car is on 118k and its a 2007 edition 30
-
HI @St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276)
I'll give that a try is it this one https://www.ebay.co.uk/itm/AMSOIL-PI-Performance-Improver-Fuel-System-Cleaner-Petrol-Additive-355ml/283652190077?hash=item420afcef7d:g:j5QAAOSwtVhdsHMc
My car is on 118k and its a 2007 edition 30
Yup thats the one. For a 2007 car that is alot of builup. U need tk concentrate on the intake valve cleaning as much as the injectors. I highly suggest to use amsoil powerfoam. It took me a good 2 months of constant cleaning to clear up the gunk. Again forgot how many cans i used thatd how much.
I use these religiously now but not as often anymore but more of a maintenance and preventions.
I did a boroscope last month any my valves look fairly clean. The only gunk left was the top of the valves cos u need to scrub that physically. Apart from that looks good. Im still on my original injectors and goin strong.
Sent from my iPhone using Tapatalk
-
HI @St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276)
I'll give that a try is it this one https://www.ebay.co.uk/itm/AMSOIL-PI-Performance-Improver-Fuel-System-Cleaner-Petrol-Additive-355ml/283652190077?hash=item420afcef7d:g:j5QAAOSwtVhdsHMc
My car is on 118k and its a 2007 edition 30
That one you linked and this:
https://www.amsoil.com/shop/by-product/other-products/cleaners-and-protectants/power-foam/
Sent from my iPhone using Tapatalk
-
I had a rough idle caused by the dipstick seal believe it or not- new one sorted it
-
I had a rough idle caused by the dipstick seal believe it or not- new one sorted it
That would be vacuum leak. Another culprit those things lol
Sent from my iPhone using Tapatalk
-
Hi Guys
@St282 (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=43276) @titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462) @Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733)
Got my inlet clean yesterday (Inlet was dirty) and injectors tested (Injectors are fine) by ASK tuning - unfortunately, my cylinder 2 is misfiring because the ring/piston is damaged :sad1:
Thinking if I should just sell the car as it is as I have spent so much money on it, the last 2 months I spent near £2k on it.
or should I do a CDL engine refurb someone is asking for £2k. This is what they are going to do below
Engine block thoroughly cleaned & surfaces treated
Engine block surfaces machined flat
Tolerances checked on wearable items
Oil pumps inspected/replaced if necessary
Cylinder head skimmed or replaced if necessary
New OEM oil seals installed
New OEM valve seals installed
Valve seats machined
Valve lapped to ensure a tight seal
Block cylinders inspected for cracks
New cylinder liners fitted
Cylinders machined to factory specification
New upgraded gas nitride ion piston rings fitted
Connecting rods inspected & machined if necessary
Crank shaft crack tested, ground & polished to specifications
New OEM big end bearings fitted
New OEM main bearings fitted
New OEM spec Eristic head gasket fitted
All bolts torqued to specification in accordance with Auto data
Assembled units oil pressure tested
Assembled units compression tested
-
Is it running if so is it o.k?
-
Hi @titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462)
Car starts fine, drives okay, you can hear and feel the misfire still judders and engine light flashing
-
How was the ring/piston damage identified?
-
Fahim if you send your email address I can send you pics of the part that caused my problems. Kevin
-
Hi
@bobby_fodge (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=26224) AKS tuning used a camera and a cylinder compression test
-
Hi @titchy (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1462) sent you a PM
-
Hi
@bobby_fodge (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=26224) AKS tuning used a camera and a cylinder compression test
Have you asked Aks for a quote just to replace the piston?
You could then compare that cost against the cdl engine swap
-
@bobby_fodge (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=26224)
I think it would be more complicated because there could be other issues if they start stripping it, so they said engine swap or rebuild is the best options
-
Oh no, sorry to hear that mate. Breaking a piston is a very real possibility with aggressive Stage 2+ tunes unfortunately, especially if you pick up a bad tank of fuel or accidentally put 95 RON in it.
It was going to be my next suggestion if injectors didn't solve it.
You could opt for just a single piston and ring set but chances are the cylinder bore is scored, which will need an oversize rebore and matching piston/ring set. A nice set of Wossner forged pistons will set you back £600ish, and a cylinder hone shouldn't be more a few hundred at a competent machinist.
A CDL is a good option but I'd personally go with a good low mileage one over a refurb tbh.
Obviously if you sell the car as it is, it will limit your prospective buyers and value sadly. Catch 22.
-
HI @Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733)
I found someone near me who said they can refurbish my whole engine (£2.1k) so I might do that, I called R-tech to confirm if that's okay they said refurbishing would be fine, I believe the company will sort the piston issue also.
I would of forged the engine, but i'm on a budget spent loads on this car already, almost had the car for 2 months
The guys that I am going to are well known with refurbishing engines, a lot of people that I spoke to said refurbishing it is a good idea. I guess if it's refurbed, back of my mind I know the engine is new in a way.
-
I don't see how they can do it for that cost when a set of genuine pistons, rings, bearings, valve stems/seals, gaskets, chain gear etc etc is over half that......plus machining labour.
If it were me, I'd be looking for something like this instead. Trust me, no refurbished engine is ever as good as a factory one. I speak from experience.
https://www.ebay.co.uk/itm/COMPLETE-CDL-ENGINE-VW-R20-AUDI-S3-2-0-TFSI-CDL-COMPLETE-ENGINE-WITH-TURBO-ECT-/274021948069
-
@fahim4094
How did you get on here?
-
Speaking of rough idling, with all the Covid nonsense and consequential short journeys, my idle quality suffered massively.
LiquiMoly injection cleaner cleared it right up. I'm not normally a believer of miracle cure chemicals, but this stuff actually works! Only 7 quid as well, so cheap enough to use regularly :happy2:
-
Speaking of rough idling, with all the Covid nonsense and consequential short journeys, my idle quality suffered massively.
LiquiMoly injection cleaner cleared it right up. I'm not normally a believer of miracle cure chemicals, but this stuff actually works! Only 7 quid as well, so cheap enough to use regularly :happy2:
Ironically i was gonna get some tomorrow. Im having a bit of sputtering whilst idle, at times not all the time. Its like having a vacuum leak but its not
Sent from my iPhone using Tapatalk
-
Speaking of rough idling, with all the Covid nonsense and consequential short journeys, my idle quality suffered massively.
LiquiMoly injection cleaner cleared it right up. I'm not normally a believer of miracle cure chemicals, but this stuff actually works! Only 7 quid as well, so cheap enough to use regularly :happy2:
Same here. I have a company van so hardly use mine in week and always wondered if it needs a good run on the motorway once a week or something or whether the car will be fine if its just sitting in drive all week?
-
Speaking of rough idling, with all the Covid nonsense and consequential short journeys, my idle quality suffered massively.
LiquiMoly injection cleaner cleared it right up. I'm not normally a believer of miracle cure chemicals, but this stuff actually works! Only 7 quid as well, so cheap enough to use regularly :happy2:
Was it this one @Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) Liqui Moly 1803 Injection Cleaner?
Thanks
-
Speaking of rough idling, with all the Covid nonsense and consequential short journeys, my idle quality suffered massively.
LiquiMoly injection cleaner cleared it right up. I'm not normally a believer of miracle cure chemicals, but this stuff actually works! Only 7 quid as well, so cheap enough to use regularly :happy2:
Was it this one @Pudding (https://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=10733) Liqui Moly 1803 Injection Cleaner?
Thanks
Yep :happy2:
I can't guarantee anything, but if your injectors are a bit gummed up, this stuff will definitely help.