Author Topic: Diverter valve issue?  (Read 2483 times)

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todzilla

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Diverter valve issue?
« on: Mar 29, 13, 19:52 »
Just recently purchased my '01 TT 225, and so far I'm lovin it   :toothy: - but of course, it needed a bit more punch, so I had PG's install a stage one Revo remap today.

All was good on the drive back to Van - never really punched it as I thought she'd need some break-in time....but when I got to town, I had a chance to test her out from a few lights for shits and giggles and right off the line she pulls hard, but then she would sputter/misfire as if the turbo was leaking boost.  Part throttle and cruising around was no problem, but at wot, it reoccured.  From what I understand, the diverter valve is likely tired (121000 km's) - and not allowing full boost?

Is this  the likely culprit, and if it is, is this a fairly easy (for a diy wrencher) job, or should I leave it to PG's to sort it out?  I have no problem paying the (roughly) $200 to re and re it, but if I can save a little by tackling it myself, why not?  Of course, I'm hoping there's a local source open on Saturday that carries these?  Cheers!

Blue Flame

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Diverter valve issue?
« Reply #1 on: Mar 29, 13, 20:08 »
Todd

If you want one I have an OEM revision c you can have. I'm open this weekend :)

Andrew
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todzilla

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Re: Diverter valve issue?
« Reply #2 on: Mar 29, 13, 20:12 »
Really?  Where are you located?  Can you pm me with some details?  (price/is this a diy type install...that kinda thing.)

Much thanx!

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Diverter valve issue?
« Reply #3 on: Mar 29, 13, 20:35 »
PM coming
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EuroG60

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Re: Diverter valve issue?
« Reply #4 on: Apr 02, 13, 11:03 »
I bet its coils and or plugs and not the diverter. If you do replace it you want the N revision (710 N)

todzilla

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Re: Diverter valve issue?
« Reply #5 on: Apr 02, 13, 13:47 »
I bet its coils and or plugs and not the diverter. If you do replace it you want the N revision (710 N)

Wow - good guess!  Just got back from the shop and turns out I have 2 bad coilpacks so I'm getting all 4 put in, and some new plugs while I'm there.  Diverter valve's ok it seems.  Looking forward to actually experiencing this remap when the car's running A1 again!

Blue Flame

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Re: Diverter valve issue?
« Reply #6 on: Apr 02, 13, 14:44 »
Wow - good guess!  Just got back from the shop and turns out I have 2 bad coilpacks so I'm getting all 4 put in, and some new plugs while I'm there.  Diverter valve's ok it seems.  Looking forward to actually experiencing this remap when the car's running A1 again!

Glad you got it sorted out! Odd that it didn't throw a code when we scanned it on the weekend.

enjoy the remap!
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todzilla

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Re: Diverter valve issue?
« Reply #7 on: Apr 02, 13, 17:11 »
It is, though I suspect why it may not have.  On my way out to PG's from Van this morning, I was in the 'slow' lane approaching the 152nd exit just over the bridge, and decided to scoot around a dawdler ahead.  As I changed lanes, I noticed a quickly approaching 350 in the rearview so I had to mat it, somewhat.  Normally, no issue, but for the past 5 days, the sputtering definitely impeded my ability to get full boost, but I had to stay on it and get thru the wheezing!  Was a little white-knuckley, to be sure!  Just as I got to the 108th st turnoff, my check engine light came on.  I guess that last push put it over the top and threw the code?  it is 2 and 4 coilpacks that are faulty - though I'm replacing all 4.  I suppose as there was no previous CEL on when I came out to you guys, there was nothing that would have shown up?  That's my theory anyways?

Again though, very much appreciated your help yesterday.  Was worth a shot!  I'll let you know how it all turns out - Friday (hopefully) or next Monday.


EuroG60

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Re: Diverter valve issue?
« Reply #8 on: Apr 10, 13, 15:17 »
It is, though I suspect why it may not have.  On my way out to PG's from Van this morning, I was in the 'slow' lane approaching the 152nd exit just over the bridge, and decided to scoot around a dawdler ahead.  As I changed lanes, I noticed a quickly approaching 350 in the rearview so I had to mat it, somewhat.  Normally, no issue, but for the past 5 days, the sputtering definitely impeded my ability to get full boost, but I had to stay on it and get thru the wheezing!  Was a little white-knuckley, to be sure!  Just as I got to the 108th st turnoff, my check engine light came on.  I guess that last push put it over the top and threw the code?  it is 2 and 4 coilpacks that are faulty - though I'm replacing all 4.  I suppose as there was no previous CEL on when I came out to you guys, there was nothing that would have shown up?  That's my theory anyways?

Again though, very much appreciated your help yesterday.  Was worth a shot!  I'll let you know how it all turns out - Friday (hopefully) or next Monday.



If I were you I would call up the dealer and see if ther is any outstanding recalls on the coils for your car. (Recall 28F3)

todzilla

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Re: Diverter valve issue?
« Reply #9 on: Apr 11, 13, 01:16 »
Well, it's kinda moot now as PG's replaced all 4 and the hesitation is gone!  She runs greatv again, though I need to go back again to check the settings as it seems they may need refreshing as it doesn't have the initial 'oomph' she had upon the initial 5 hour test run....think my low battery may have caused a rift.  Hope gully that extra 40ish ponies can be found ;)

Jeremy Sawatzky #2

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Re: Diverter valve issue?
« Reply #10 on: Apr 24, 13, 01:04 »
I am having the exact same issue on my 1.8t - Good to hear coilpacks solved your problem. Mine are over 10 years old. I suspect they are the culprit. I thought it was the DV as well but alas after trying a different one there was no difference.
2005 BMW 325i, 2016 Mazda CX5, 2014 KTM 1190 Adventure, 2006 Yamaha FZ6

Blue Flame

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Re: Diverter valve issue?
« Reply #11 on: Apr 24, 13, 08:55 »
I am having the exact same issue on my 1.8t - Good to hear coilpacks solved your problem. Mine are over 10 years old. I suspect they are the culprit. I thought it was the DV as well but alas after trying a different one there was no difference.

I can't remember if 2.0T coils work for the 1.8T (may need an adaptor) but if they do, I have a used set from my old 2.0T that still work fine that you can try swapping in if you want. If they end up working and you want them I'll sell 'em to you cheap just to get them out of my garage.
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todzilla

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Re: Diverter valve issue?
« Reply #12 on: Apr 24, 13, 11:37 »
I'm still working on 'finding' the REVO tune - at least all of it.  Since the full flash, it just lacks the urgency from initial test flash and it was determined (after a scan and test run at PG) that she was retarding the timing in the upper rpm's a bit, causing a 'loss' of power.  It was suspected that my switching gas - shich I very rarely normally do - from Chevron (originally, for years) to Shell - which I've used more lately - to Petro Can (one tank only) has limited the tune to run at full boost.  They say run thru this tank and get back on the Shell 91 and retest it in a few weeks and the power should be back, in full affect.  I hope so.

Anyone else have good/bad gas experiences?

Blue Flame

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Re: Diverter valve issue?
« Reply #13 on: Apr 24, 13, 11:45 »
I can't say for sure, but I'd be very surprised if it was the gas causing your issues unless you got a really bad batch of gas. The timing isn't going to be retarded unless the octane goes way down (i.e. you're starting to fill up on 87, in which case, stop it ;) )

I'll let others with more Revo experience chime in, but this just sounds really fishy to me. I'd say you're looking at a bad flash, or a different undiagnosed problem.

To be honest, this is why I went with APR over Revo. Unitronic is also a very good piece of software.

I'm still working on 'finding' the REVO tune - at least all of it.  Since the full flash, it just lacks the urgency from initial test flash and it was determined (after a scan and test run at PG) that she was retarding the timing in the upper rpm's a bit, causing a 'loss' of power.  It was suspected that my switching gas - shich I very rarely normally do - from Chevron (originally, for years) to Shell - which I've used more lately - to Petro Can (one tank only) has limited the tune to run at full boost.  They say run thru this tank and get back on the Shell 91 and retest it in a few weeks and the power should be back, in full affect.  I hope so.

Anyone else have good/bad gas experiences?
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