Retch remap short lived

[shortdan14]

So I went to r tech for a stage 1 remap for my edition 30.
All was going well, the guys up there are great and they really know their stuff. Car got mapped and and I took it for a test drive.. Oh wow! It was amazing.

Any who, I got back. Left the car running at idle and went to pay up. I came back to the car and it had an engine management light crop up! My heart just sank.

We connected it up to the computer and there was a fuel pressure fault, which only came up at idle.
Now I don't know my stuff all that well but on vcds it was block groups 103 and 230 I believe he was looking at. At idle I think on group 230 expected pressure was meant to be 50 bar and it was only at 25.

We did loads of runs with and mainly without the remap. When on throttle the pump seems fine but as I say at idle it drops and before it manages to compensate it brings up an error code.
We replaced the cam follower to be on the safe side and tried a low pressure switch from another gti but the problem is still present. I drove away, sadly, with no remap and an issue with my car. I was enroute upto Scotland and the car was fine, hit some traffic, had to stop and my engine management light has popped on again. Car runs fine but I can't clear it now.

Anybody ever had this issue? Know what it could be or have any ideas on what needs replacing? It's an 07 reg.

I'm glad it came up because it was obviously underlying. When fixed and I have the remap back on I shall write a review for retch. Great guys. When the issue arose they were superb in trying to help out.

[DanGB]

Hi, its a bit vague, to know whats happening without the fault code.

Remember there are two sides to the fueling system , low pressure and high pressure, and they can have very different issues.

[cheungy]

Could be anything from fuel filter to changing the high pressure pump or worst case worn camshaft

Times like this, Owning Code reader helps a lot!

Good luck 

[GrayMK5GTI]

Saw the title and thought this would be Niki's first bad review 

Hope you get it sorted mate, nothing worse than a problem you can't diagnose 

[heavyd]

when I had a faulty low pressure pump, it only went bad when I was accelerating, was ok on idle. took me ages to solve, but like I said, ran fine on idle. Maybe fuel filter??

[shortdan14]

Yeah I really wish I owned a reader right now.
I emailed nick but he can't remember the code, just knows it was a code to do with the low pressure side of things.

Also it only happens when the engine is hot. I left the car over night and drove from Scotland to Dorset with no lights today. Unfortunately I can't check for codes. It's booked in for a bit of diagnosis next week. See what comes of it...

[Pikey Motorsports]

so there was no problem before they mapped it 

[Saintsteve]

so there was no problem before they mapped it 

No..the remap highlights an underlying fault... 

[Pikey Motorsports]

can you give info to prove that? nothing against r-tech i nearly went there just interested how that can be said

[vRSAlex]

can you give info to prove that? nothing against r-tech i nearly went there just interested how that can be said

If it was their map then every ed30 that goes in there would come out with the same fault, and no map.

[Pikey Motorsports]

its not just a map though like they plug in through the laptop.. every map/car is different

[vRSAlex]

Generic map that is tweaked to the car.  Was highlighted straight away so imo not the maps fault.

[xjay1337]

its not just a map though like they plug in through the laptop.. every map/car is different

Sound a bit like Marshall.

In the process of mapping a car a fault developed.
nothing wrong with Niki's process.

[shortdan14]

can you give info to prove that? nothing against r-tech i nearly went there just interested how that can be said

Nick tried to explain it too me...

Basically the car may have had an underlying fault where a part could be slowly failing, during this time the ecu makes minor adjustments all of the time keeping values within limits. So it will make an adjustment before it throws up a fault code and everything goes as it should.
When they put a remap on, they check for codes, of which there were none, and then they put the map on, which would clear any adjustments the ecu had previously made. So when the ecu recognises the fault again because it is so far out of limits due to no adjustments a fault code appears.

I have just got back, having Taken the car to France and back. I ordered a vag code reader and the car shows up no codes!? 

I feel like I am going to take it to the vw specialist and they won't find anything.

[Marshall]

its not just a map though like they plug in through the laptop.. every map/car is different

Sound a bit like Marshall.

In the process of mapping a car a fault developed.
nothing wrong with Niki's process.

I really don't think we can compare an Rtech map to my scenario.
From evidence on here Rtech maps loads and loads of Tfsi cars with great results.