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

[john_o]

update

2 days at Awesome for some swap n check stuff.
New fuel filter fitted   = no diff
New in tank lift pump = no diff

and I think just to see if it did fix the issue

HPFP off the demo car tried = OK , no CEL hurrah (well almost!)

std pump put back on = CEL returns


The trains were delayed when I went to pick it up, but John@Awesome stayed behind past 6 just so I could get my car 
Im gonna have a chat with Jim as Im still not entirely happy , Awesome however continue to impress and have now spent a not inconsiderable amount of time and money on my car (I have not payed a penny) to get to the bottom of this.

Long and short is that the Ed30 std setup should support 128 bar throughout the rev range for APR stage 1, based on the hundreds of mapped K04 cars. Mine doesnt!

There are now several avenues
 
1 : Have the car flashed back to stock.
2 : as above and try another remap (although I suspect I may still have the same issue)
3 : APR to review my car even more thoroughly on Awesomes dyno + logging  and supply a custom map if reqd !.
4 : Add the HPFP , which given the issues I have been offered at a vastly reduced price


Still cant help but feel the HPFP is just a band aid rather than fixing the primary problem!
The car has ran great since I picked it up! Now running some injector cleaner and a new tank of fuel.
I will see how it goes, as I need to consult with MrsO on the way forward.

I think Gaz may have something with the Lambda sensor/EGR and the map dumping extra fuel in to lower the EGR at higher temps, or the sensor itself getting covered giving different readings to the ecu.
I also still cant help get away from the fact some octane booster helped 1st time around.

Im also going to test my theory that a period of gentle running then a thrash makes it more likely to happen.

Try as i might I thrashed the car home (ESP off, deliberate wheelspin in 2nd /3rd to get rpms to limiter) and it just wouldnt happen.

I'm going to take a few days to consider my options and see how the car runs ..........

[gazbutS3]

good to see awesome workin hard to try and fix it john, I think you should go the discounted HPFP route, not fit it and give it me

[neg]

not fit it and give it me

I couldnt find the rolleyes smiley so this one will do .. 

(was that added just for you gaz!)

[gazbutS3]

think so

[john_o]

update, Jim gave me a call this morning, still very keen to get to the bottom of this

1. The problem did not occur at ProSport , car ran fine for 2 days after remap, problem only occurred 4 days in.
2. Changing back to my standard pump yesterday , it DIDNT misfire initially, only on my way home once. In fact picking my car up yesterday it was silent ! very quiet , but once Id got home it was back to a pronounced ticking (Yes, I know the injectors make a tick normally but it was noticeably different)
3. Octane booster appeared to help
4. The Fuel Pressure Sensor has not been changed , I though it was part of the pump , but its been swapped each time. This was a early car recall which I assumed wouldnt be a problem, but now I know its never been swapped its a potential problem.
5. I thrashed the car into work this morning and only got 1 instance of CEL, about 15-20 at least runs in 1st/2nd/3rd ESP off into limiter.

So, just swapping pumps appears to help! (be it HPFP or back to my same std pump)
The problem was repeatable up until yesterday (each run past 6300 rpm would cause a CEL), now it happens infrequently.
I am going to run for another week and see how it goes...............

[RedRobin]

^^^^

I feel for you, mate - It's so frustrating when a fault isn't clear-cut.

[john_o]

cheers Robin , working in IT writing software, I'm a methodical facts kinda guy so these kinda faults bug the sh*t out of me tbh
Esp when I cant do the troubleshooting myself.
we will see..........

[RedRobin]

....

At least you have some caring and knowledgable people on your case

You'll solve it eventually......It just takes frustrating time.

[john_o]

opened up on the way home after an Xmas meal last night,
now back to consistent repeatable CEL's under every WOT run past 6300rpm ......ARGHHHHHHHHHHHH

Useful thread on MkV faults here
>> common issues and remedies for the 2.0T <<

Next stop replace Fuel Pressure Sensor on pump and maybe even the fuel tank cap!

[Steve Baker]

update, Jim gave me a call this morning, still very keen to get to the bottom of this


So, just swapping pumps appears to help! (be it HPFP or back to my same std pump)
The problem was repeatable up until yesterday (each run past 6300 rpm would cause a CEL), now it happens infrequently.
I am going to run for another week and see how it goes...............

Hi
sorry to hear of your problems.
Reading through your posts it would appear that the one common denominator to recreate the fault is the fuel pump??
You have tried a high pressure pump and no fault but nowhere can I see you have replaced your std pump???? might be worth a try.
When we were circuit racing years ago testing to find a high rpm misfire used to pain me as I always feared for the longevity of the engine running at WOT all the time! I feel for you. 

[john_o]

thanks Steve appreciate you input 

Yes one of the first tests was to swap my std pump for another std pump, the misfire continued as before.
Which to my mind indicates its not the pump.

Im assured the engine protects itself enough, but yes WOT lean conditions are really bad for a turbo car, but yes that worried me too. Any evidence to the contrary?

[T88OMM]

It must be buggin you big time this John. Hope it all gets sorted soon. I think it is just a great excuse to get the APR HPFP and HPFP specific software 

[gazbutS3]

The price has just been reduced for the APR HPFP

[RedRobin]

The price has just been reduced for the APR HPFP

....More than the 2.5% reduction in vat?

[gazbutS3]

yes, more like 5% , then the Vat reduction on top I should imagine