MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Saintsteve on February 29, 2012, 07:57:04 pm
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Wonder if anyone knows or has any idea what could be wrong...
Since having my twintake installed, the car from Cold starts is extremily lumpy on idle... Kind of like the days of when an engine on manual choke would be, hunting and sounds rough as hell, also on warm up , it happens when the idle speed is normally around 1100 untill the revs drop back to normal 750 after around a couple of minutes its then absolutely smooth as anything.. No issue actually starting but its a lumpy as the wifes Porridge :sad1:
Also whether this is another issue, what i did notice yesturday is at top end im getting either a missfire or pulling back on the engine above 5000rpm in 4th and above gears, im hoping its not what i think it might be (fuel Cut) but could it be failing Bosch plugs? that were changed 5000k ago, ive checked VCDS and no miss fires are showing...
Ive yet to log the car since the intake, but Superchips did knock back the boost levels to help the way the car drives on my request.
Any idea's would be great..
Thanx in advance.
Ps I know Brakes are nothing to do with this fault, so before the bright sparks jump in with witty comments.... :grin:
If its fuel cuts then a 4 month old twintake and spare engine cover with be in the classifieds shortly....
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I suggest you go and do some logs. :smiley:
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Steve, I don't know what the problem is but I didn't experience any lumpy starts when the Twintake was on my car.
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Where can i buy these New NGK spark plugs from? are the dealers selling them?
I will Ian once i have the cold start running sorted out, which im sure will sort the Miss-fire at top end out aswell.. fingers crossed.
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I think these are the ones
http://item.mobileweb.ebay.co.uk/viewitem?itemId=190523744865&index=3&nav=SEARCH&nid=63994459187
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Steve this the best and cheapest i've found for the plugs ( also the link thats in the product review section :happy2: )
http://www.ebay.co.uk/itm/320797953741?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 (http://www.ebay.co.uk/itm/320797953741?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649)
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Hi Steve,
I had some very similar issues with my twintake.
I sold mine eventually due to not liking the noise.
I was expecting similar levels of performance to my BDM Intake which was wild on 2+ 9-5-9 but I had to back the settings off as the timing pull was horrendous.
It felt like the car was not faster than standard.
It is now back to 9-5-9 on a pipercross panel, soon to be an ITG Maxogen CAI.
I didn't want to make any comments on here as a lot of people like them but I am not so sure they are that good.
J
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
I did speak to Superchips and they said that their stage 2 map wouldnt require any adjustments having a CAI to suit their Stage 2 Map??
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Its a bit strange as the BDM was perfect but Ill see how the ITG is and report back.
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
I did speak to Superchips and they said that their stage 2 map wouldnt require any adjustments having a CAI to suit their Stage 2 Map??
How is this known to be a fact without datalogging? Our stg1 is 'usually' fine with stock and cars with exhaust, intake etc... But theres always a few that throw up some issues, datalogging and alterations to the map fixes these few. Is it the maps fault? No. Is it the changes made to the hardware? Yes.
This is why generic mapping is never an exact science, 'should be fine' isnt the same as 'we have datalogged, dyno tested, road tested and created a perfect map for your car'
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....but could it be failing Bosch plugs? that were changed 5000k ago,
Well if you will leave it 5 million miles between changing the plugs.... :P
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
I did speak to Superchips and they said that their stage 2 map wouldnt require any adjustments having a CAI to suit their Stage 2 Map??
Yes but your car isn't running the normal stage 2 as the fuel pump couldn't keep up. :popcornsoda:
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
I did speak to Superchips and they said that their stage 2 map wouldnt require any adjustments having a CAI to suit their Stage 2 Map??
Yes but your car isn't running the normal stage 2 as the fuel pump couldn't keep up. :popcornsoda:
To be fair Ian, the car has been 100% Terrific infact for 10 days or so since the intake was fittedwith no power loss or Bad idling, so the more i think about it, its not going to be a map or fueling issue as it would of been an issue from day 1.
Plugs are on there way, ill go from there, if not the Intake and Engine cover will be up for grabs as a bundle ..
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(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fwww.jkm.org.uk%2Fperformance%2FMisc%2FMisc_Performance_pictures%2FAPR%2520Pump%2Fside_big.jpg&hash=cec29014eccb52b251b75d0d5dc102dc542bbbe5)
:popcornsoda:
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But, if these engine ECUs adapt as you 'run in' new hardware, then it might not have shown up as an issue straight away.
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any chance the MAF is now messed up following install? not sure how much input it has in the cold start cycle ......
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I was advised it could be the MAF but I bought a revision 'B' recently and I got a minor increase in MAF reading but nothing really changed.
Ill keep the new one on but when I put the ITG on ill put the old one on first then if its rubbish ill put the 'B' on.
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flash back to OE then again back to SC map so it starts from a 'clean' starting point and learns with the intake already fitted?
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I had the same steve when i fitted my itg (flat spot/power loss at about 5k). with mine its more pronounced in higher gears, but i had no rough idle issues.
Dave yhpm :happy2:
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(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fw7%2Fhedge_68%2Finternet-memes-go-on.gif&hash=e073671703f55c442f6a0d5ac2e4286ea33074c8)
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Where can i buy these New NGK spark plugs from? are the dealers selling them?
I've got some NGK temperature 8 plugs with about 3000 miles on them. I removed them just as a precaution as my car is a K03 car with a stg 1, and most of my driving is sub 2500 rpm pootling to work. I fitted the 7s in case the 8s started to carbon up.
You can have 'em for the cost of postage if you want to rule out the plugs. Or if you're ever nr Wimborne, just pick 'em up.
edit - should have read more of the thread, as I later saw you'd bought some plugs.
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Alterations to ecu maps are quite commonly required following the installation of an intake. Cant see it being the cause of a cold start issue though.
I did speak to Superchips and they said that their stage 2 map wouldnt require any adjustments having a CAI to suit their Stage 2 Map??
Yes but your car isn't running the normal stage 2 as the fuel pump couldn't keep up. :popcornsoda:
To be fair Ian, the car has been 100% Terrific infact for 10 days or so since the intake was fittedwith no power loss or Bad idling, so the more i think about it, its not going to be a map or fueling issue as it would of been an issue from day 1.
Plugs are on there way, ill go from there, if not the Intake and Engine cover will be up for grabs as a bundle ..
I'm sure if you say it for long enough then you will believe it. :popcornsoda:
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flash back to OE then again back to SC map so it starts from a 'clean' starting point and learns with the intake already fitted?
I flashed it back to the oem stock map last night and to report, the car is the same.. At high rpm as well, so rules out fuelling issue your be gladto know Hedge :wink:
Awaiting Sparks....
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But, if these engine ECUs adapt as you 'run in' new hardware, then it might not have shown up as an issue straight away.
Yes it would adapt, but would of learned it after a couple of ignition cycles Rich.
Not after nearly 2 weeks with no performance failings prior I find the hard to except...
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Just pop the plugs out and check em as it sounds like its them to me
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Have you asked JKM their thoughts, Steve?
Hopefully it's an easy fix like plugs rather than fuel pump but that's why JKM turned down my Revo settings after fitting the much more demanding Twintake, so I wouldn't have the expense of a HPFP. A more efficient aftermarket air intake is going to change your air to fuel mix. But I don't know how the startup issue would be caused. Surely the map plays a part?
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Check if the air mass sensor is in the right direction!
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Check if the air mass sensor is in the right direction!
VRSCarl fitted it, so I hope so :signLOL:
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Just pop the plugs out and check em as it sounds like its them to me
I will, may well be loose, as I've found before the plugs loose...
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But, if these engine ECUs adapt as you 'run in' new hardware, then it might not have shown up as an issue straight away.
Yes it would adapt, but would of learned it after a couple of ignition cycles Rich.
Not after nearly 2 weeks with no performance failings prior I find the hard to except...
When i had my REVO done Steve, the over fuelling fault only reared its head about 1-2 weeks later so anything is possible.
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My GTI also suffers from thsi 'fuel cut' type intermittent sensation when occasionally in the high revs, and my car is (afaik) on standard map.
I have a twintake fitted but it suffered from this problem before the kit was fitted. VW have logged no faults and say they will not change plugs until 60k :mad:
Which plugs are recommended for a standard GTI, as an improvement over factory fitment?
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If you are not going to remap then fit NGK iridium BKR7EIX or if you are going to remap then you could keep the 7's or fit the BKR8EIX which are a grade colder. Both of these plugs are better than the OE NGK ones and you will find them cheaper to buy aswell :happy2:
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Check if the air mass sensor is in the right direction!
Check if the air mass sensor is in the right direction!
VRSCarl fitted it, so I hope so :signLOL:
It wouldn't make a blind bit of difference anyway. You can run round with your MAF unplugged and the car will run fine. The ECU will just run a default set of values.
But i installed it the right way and made sure it was pointing down into the turbo :happy2:
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Have you asked JKM their thoughts, Steve?
Hopefully you would have bought it or had it fitted by JKM to be than wanting their support with problems later on..... :rolleye:
It wouldn't make a blind bit of difference anyway. You can run round with your MAF unplugged and the car will run fine. The ECU will just run a default set of values.
But i installed it the right way and made sure it was pointing down into the turbo :happy2:
The ECU uses what it sees coming out the back end to judge how much air is coming in at the front end. :smiley: :happy2:
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Check if the air mass sensor is in the right direction!
Check if the air mass sensor is in the right direction!
VRSCarl fitted it, so I hope so :signLOL:
(It wouldn't make a blind bit of difference anyway. You can run round with your MAF unplugged and the car will run fine. The ECU will just run a default set of values.)
Hey jip, I forgot that sorry your right with the first one!!!