New ride: '02 MK4 GTI

[leighaus]

Have you seen the boost from my Polo?
http://www.vwwatercooled.com/forums/...tml#post887385

Thats a K03s as well.

They don't hold it once they peak and definitely not in the lower gears. A run in 3rd or 4th up a hill will get the best boost pressure.

As the tuners have said, you can't realistically dyno on mega hot days, the AITs go up and fuel gets injected and timing pulled.

Front mount for you soon!

Gavin

Hey Gav, thanks heaps for the response. I didnt expect magic in a heat wave, and completely understood the dyno was kind of a waste of time in the end.

However to put it simply, i went for a cruise late at night and without dumping the clutch, there is no wheelspin what so ever on stockies. which just doesnt mix with other reports. considering i have a couple of supporting mods, even more so. Peak boost is 14psi at the moment and it hits and then dives away to around 6-7 psi at only 4k. That cannot be right. The tune is also the most aggressive offered, so i would say theres some hindrance. I also pulled a fault code suggesting i have a vac leak (00561) i have cleared the codes and will see if it rears its head again.

[theOctopus]

Re: New ride: '02 MK4 GTI

Let me know how you go.

I've got similar issues but not throwing any codes at all, what's worst is the car was amazing after the chip peaking at around 18psi then after a few months dropped to what your describing.

I've replaced so many things all the vac lines boost pipes, div etc they needed to be done at some point but there are better ways to find the problem rather than just throwing money at it.

I've just got a cable and vagcom lite to do some logs but the free version won't do much so I may have to buy a licence, let me know what you find with it on yours and I'll do the same on mine to compare.

Also where did you get it dynoed?

Jake

[leighaus]

Hey Jake, will keep you up to date on progress.

Ill be away in bali being tortured by cocktails and massages for 2 weeks unfortunately, so may slow progress.

I just used VCDS lite with the cheapo cable. you can still get all the codes, you just have to use a chart to work out what each one is. does the job for my needs really.

Not sure who did the dyno to be honest, the tuners had it dyno'd for me. Somewhere in dandenong at a guess.

[leighaus]

well after clearing the tunes and putting a 100km on the road, none of those codes have reappeared. Must have all popped up during the tuning process. Still adamant that things arent right. Getting my tyres organized now through a mate for the volks.

[leighaus]

serviced the beast... whilst doing that did an engine bar clean, and had a good hunt aroundfor any boost hoses i could see, tightened a few clamps up, replaced a joiner nipple between the TIP and TB to a higher quality piece as it appeared to be failing.

Took it for a run, hoping to watch the needle on the boost gauge climb like never before... nope, still 12psi and then dies off.

Tried replacing the N75J ECS race unit for the standard N75 in a hope it might be clashing the tune... lost 2 psi. FML.

[MK4Golf]

Hey Jake, will keep you up to date on progress.

Ill be away in bali being tortured by cocktails and massages for 2 weeks unfortunately, so may slow progress.

I just used VCDS lite with the cheapo cable. you can still get all the codes, you just have to use a chart to work out what each one is. does the job for my needs really.

Not sure who did the dyno to be honest, the tuners had it dyno'd for me. Somewhere in dandenong at a guess.

where did you find the chart mate??

[leighaus]

using a combo of

Category:Fault Codes - Ross-Tech Wiki

and

http://pics.tdiclub.com/data/500/5297vag_codes_english.doc

[theOctopus]

Re: New ride: '02 MK4 GTI

Hi how are you going with your fault finding, I'm running logs and researching a heap keen to see if if you've had any luck?

[leighaus]

gday mate.. havent looked at the car in any way for the past couple of weeks. Been super busy with work (yay shift work) and have no money to get it to a workshop. I looked all over the car for any leaks, couldnt find one..

Im going to check my timing to make sure thats all hunky dory before i take it to the workshop. Asides from a leak, or a MAF issue, i just dont know what else could be robbing so much power.

Its definately not fuel, as i know that feeling.

[theOctopus]

Re: New ride: '02 MK4 GTI

gday mate.. havent looked at the car in any way for the past couple of weeks. Been super busy with work (yay shift work) and have no money to get it to a workshop. I looked all over the car for any leaks, couldnt find one..

Im going to check my timing to make sure thats all hunky dory before i take it to the workshop. Asides from a leak, or a MAF issue, i just dont know what else could be robbing so much power.

Its definately not fuel, as i know that feeling.

What should the timing be?

What did it feel like when fuel was the issue?

I'm hopefully changing the o2 sensor soon (tomorrow with any luck) I did a maf and tb clean yesterday but noticed a split CV boot before I could run some wot logs.

What blocks are you measuring?

[leighaus]

i havent had a fuel issue on the gti, only on my silvia.Iit is like a surging of power, rather than a complete lack of it, especially under load.

I need to look into timing, but i think im due for a timing belt, so ill look into costs etc to see if its a worthy DIY or better off getting someone whose done it 100 times to do so.

Im not measuring any blocks (no VCDS, only lite for faults) at this point. pretty strapped for cash with house deposit etc, hence its taking me a while.

the 02 sensor should improve your fuel, i doubt its going to give you a lot of power back, unless your ecu is going into limp mode due to an 02 fault being logged.

[leighaus]

ran a boost pressure test at home today... highlighted a cracked dipstick tube, not much else.. ill replace that then do it again.

Also raised the front about 2 inches... can fit 3 fingers between guard and tyre now.. crazy... as im heading a drive and might have to take some slightly offroad tracks to get where im camping.. hopefully dont get stuck.

[leighaus]

hell yea, took long enough!! looks awesome in person, light was fading. Need to give them a detail and the car too. The front is still jacked up from when i went camping (4x4 rake yeaaa)... I'll wind the coils down and hopefully the helper doesnt foul on the front rims. Ended up fitting 215/40/R17 to 17x8 ET38 and ET39.

[dylan8]

Nice.
Get some more pics when its back down to earth

[leighaus]

New hoses installed. Just gotta to the TB to IC and pancake to IC piping tomorrow, then ill change the coolant sensor and give her a run.