Fuel economy problems...any suggestions appreciated

[Martin]

I second this - removed the stock DP off my Mk6 GTI at approx 60,000km and the cats looked good as new....very restrictive in their design but not blocked etc

It's not a mileage issue - Brad is saying if you clean out your own inlet any crap is burnt up prior to reaching the cat

[Gerrycan]

Relative states of tune:
1.4tsi - 74kw/litre, 179nm/litre. mean pressure 21.1 bars
1.8tsi - 74 kW/Litre, 139nm/Litre, mean pressure17.4 bars
2.0tsi - 82 kw/Litre, 176nm/Litre, mean pressure 22 bars

[MickeyB]

Any gains to be made by following Subaru's method of "UPPER ENGINE CLEAN"?

I'm noticing my MY16 POLO GTI get a bit 'cranky' during cold high idle and in hot traffic, albeit only 8500kms.

Could be less amicable fuel that I've read about....that is, they don't live VPower


MY13 Kluger KX-S AWD / MY16 Polo GTI

I've used the upper engine clean on a couple of my cars: it's pretty nasty stuff: requires gloves, preferably not breathing the fines and it STINKS when you run the engine.

As far as results go, my mech swears by it, but if I'm honest, I never really noticed it having much affect on either engine running or fuel efficiency on my vehicles.

For reference, I tried it on a jap 4 cyl turbo (Toyota Caldina), atmo V6 (V35 Skyline), and BMW V8 (540i). All cars were well services, around 6-10 years old, and had between 60,000 and 110,000km on the clock.

I paid nothing for the process, but in my case can't say whether it did anything beneficial.


No battle plan ever survives contact with the enemy

[woofy]

I had issues like that years ago and turned out the apprentice hadn't connected the gauge properly underneath the rear seat when replacing the fuel filter.