whoosh.....stutter........CheckEngineLight! [fixed pg5]

[bacillus]

Is this for both new and rebuild pumps?

If it is, can't see it lasting for long seeing how weak the pound is vs the dollar.

[gazbutS3]

I was talking about exchange

[john_o]

update

the car is now back at Awesome, my trusty steed for just now is a Mk3 GTI 
And without prompting John@Awesome has just provided an update 

the bad news = it aint fixed yet
the good news = the walls are closing in to a fix 

The problem was recreated on the dyno with full logging, and for some reason the car is dumping a load of fuel into the cylinders at a specific point causing a stutter. (the reduced fuel pressure is a symptom not a cause)
The car apparently runs very well (stutter aside  ) and after seeing its not running lean etc it pulled 320 bhp on the dyno !
(which is higher than normal for a stg1 ed30 and matches what it pulled at Prosport fyi)

feel much better I know the car is basically healthy, heres to a fix 

[Hurdy]

Would the fuel dump occur between 3 and 4k by any chance?

[john_o]

its 6300rpm  ish Hurdy

[Hurdy]

Not what I thought it may be then.

6,300 rpm and my DSG would be gearing up

Seems an unusual point in the rpm to dump excessive fuel!

I'll definitely be keeping up with your updates now John as it has peaked my interest.

[john_o]

to be fair its 6100-6300 range.
Im not sure its excessive fuel per se, more a faulty sensor/regulator triggering a condition that the ECU doesnt like and decides to increase the fuel.
The problem from my perspective is whats a cause and whats an effect! but then I dont really have to, Ill let awesome do that.

[john_o]

while we are waiting for a fix, I treat as I would my own so today the 'awesome' car got a bath....

[garethmk1]

Guys,

Hmmmmm, seems I may have the same problem with a SC remap.

http://www.mk5golfgti.co.uk/forum/index.php?topic=1180.60

Regards,

Gareth

[john_o]

UPDATE : Its fixed   

After a lot of diagnostic work and logging by Awesome, the route cause has been traced back to the map 
(despite APR convinced it wasnt)

a single data value was incorrect on one of the data lookup tables.  I dont envy the sheer amount of RR time this has taken to pinpoint !
This error has been introduced in a recent map 'cleanup' according to APR (why Gaz's ED30 never did it!) revision to the map.
It also explains why the HPFP fixed the issue (unknown to me they also loaded the HPFP map), as that map doesnt have the error either.

I'm made up to have a solution, but in some ways disappointed it wasnt something else. For me its not just fixing the issue, its how its fixed and the implications from that. (e.g. how did happen, whats QC is in place to prevent it happening again etc)
I can only trust(!) that following this, APR perform a full post incident analysis (as im forced to do at my own place of work).
I am however surprised that this gets into a production file in the first place. 

What I cannot fault is the way Awesome have dealt with this from day 1, John has forever kept me informed (without prompting) and relayed info, Jim (and the team) has personally ensured that I have got a result here using the facts and hard work, where he was placed in a very difficult position between my questions, the fault and APR (Im not someone to be fobbed off without facts  ). Nothing less than I expected but in this day and age sorely lacking from many.

So there you go, an honest response (* as given to me) as to what was wrong, take from it what you will.
For me, this only re-enforces tenfold my belief in Awesome and why I chose them. Top work guys 
It also does so with APR software to some extent (not for the fault but their honesty and fixing it), but I'd be lying if I wasnt surprised at the outcome.

Yes, I would buy APR again : definitely 

The only outstanding question is how many cars got this map? and why only me has had the issue? everyone else driving like miss daisy lol

Gareth unfortunately it isnt going to help you   
( * well unless theres some data 'sharing' gone on, which for one minute I'm not suggesting!)

Roll on Santa Pod , WhiteGTI GAME ON 

* post remap dyno plot to follow

[winrya]

Thats great news.

I'm very very tempted to go for a trip and have an apr remap on my gti.  I'm well aware there is no point doing it unless i change the diverter valve to the forge upgrade but they are now claiming 252bhp and 304lb of torque on a standard gti.  Slighly down on the 262 revo claim but im a bit worried that pushed the engine a bit far.  MMMM £700, is it worth it.........

[illyun]

Glad you got a happy ending, nothing worse than when something goes wrong and you have no clue what it is !

Although the UK fuel tests show Tesco 99 to be very good, i have heard rumours its very bad .

i never touch the stuff, V power or worst comes to worst BP.

I'm exactly the same.. only Optimax or worst option BP Ultimate - used it once or twice for a £10 temp refill over 27k miles

[garethmk1]

Am glad you got to the bottom of it !!

Regards,

Gareth

[Hurdy]

Good result John

I too would be concerned about the APR QA side of things as well as development controls.

[WhiteGTI]

Roll on Santa Pod , WhiteGTI GAME ON 

Ohhhhhhhhhhhhhhhh bugger!!

Although, I am really glad that you have finally fixed the problem!!!