TSI Tank Clean out

[TSOTSI]

so the TSI decided to start juddering at h`way speed, I thought was a faulty coil pack or plugs and went to change them with no luck, then I took her VW for a full diagnosis and they said I had dirty fuel in the tank oil had mixed with the fuel from a filling station, they recommended I remove the tank and clean it to start with. after taking this job on myself was surprised at what I found. I did clean it out good and proper but alas she still has the judder so my next step is de-carbon and perhaps new injectors as tried injector cleaners in the tank and no luck

[Newkidontheblok]

so the TSI decided to start juddering at h`way speed, I thought was a faulty coil pack or plugs and went to change them with no luck, then I took her VW for a full diagnosis and they said I had dirty fuel in the tank oil had mixed with the fuel from a filling station, they recommended I remove the tank and clean it to start with. after taking this job on myself was surprised at what I found. I did clean it out good and proper but alas she still has the judder so my next step is de-carbon and perhaps new injectors as tried injector cleaners in the tank and no luck

If the pump is still good, and it ought to, it's been oiled, maybe there's a drop in pressure from oil contamination in the fuel filter. I don't know how you would check the pressures on those.
When the dealers apply injector cleaner, they apply it neat straight into the fuel lines.

[Sharkie]

Did you replace the fuel filter? I had this a few years ago, got "bad" fuel that clogged the fuel filter. Once you have the filter its a 10min job to replace.

[TSOTSI]

Did you replace the fuel filter? I had this a few years ago, got "bad" fuel that clogged the fuel filter. Once you have the filter its a 10min job to replace.

Yes, replaced filter every 10 000 kms and after i did the clean out, when I spoke my technician at VW he also mention could be leaky injector.

[Newkidontheblok]

Yes, replaced filter every 10 000 kms and after i did the clean out, when I spoke my technician at VW he also mention could be leaky injector.

I replaced the injectors in my last vehicle at 900k. Jap. Last forever. Nearly. Anyway, bought a used set of injectors and had them serviced by an EFI technician before having them fitted and got better fuel consumption than when it was new...by almost 2 litres/100 and it went like it had a new motor.

[TSOTSI]

Quick and maybe dumb question but when I replace the injectors does my TSI need recoding or simply plug and play.

quite intrigued to see when I do the Walnut blasting if its heavily carboned but I sure it will be.

[meeso]

Quick and maybe dumb question but when I replace the injectors does my TSI need recoding or simply plug and play.

quite intrigued to see when I do the Walnut blasting if its heavily carboned but I sure it will be.

Not if they are the same spec. Only if you use larger injectors (or smaller but surely nooone would)

[Sharkie]

so the TSI decided to start juddering at h`way speed

At what speed and in which gear?

Should have asked earlier ....

[TSOTSI]

At what speed and in which gear?

Should have asked earlier ....

5TH to 6TH at say 120km/h if I put my foot down, either flooring or gently

[Sharkie]

5TH to 6TH at say 120km/h if I put my foot down, either flooring or gently

That is a known APR tune issue I'm afraid. I have it too. Not enough fuel being provided by the HPFP for what the tune requires at low(ish) revs in those gears.

It (the stuttering) goes away when you drop to 4th/3rd and floor it, yes?

I am in the process of upgrading the HPFP (bought a new 1 to install (which arrived last week) while I do the Autotech HPFP upgrade to the old 1) and will post the results of that soonish.