Hopefully someone can help me, it could possibly an easy one for some of you!

 

Last weekend I blanked the EGR off on the car ('56 BXE PD105) after a Mr Muscle turbo clean and scanned for faults which were cleared with the full Torque app.

 

There are now codes stored for the EGR and theres still a code for the boost issue with limp mode present (I'm guessing the control ring is coked up). Up until last night my MPG reading hadn't really changed from what it's always been (Average of around 45)

 

Last night i gave the turbo actuator a little lubrication just incase it was something sticking on the outside and took it for a drive (Made no difference!). I pulled over and the car stalled out and wouldn't restart. Turned out i'd not reconnected the maf/map sensor after taking the intake pipe off! Reconnected. Started fine and off it went. Same issues with boost/limp mode though.

 

This morning however. My usual journey to work which usually shows around 58mpg until i get into the city (Drops to low 40s when i get to work) was reading as 17. The fuel gauge also had a noticable level drop. Scanned for faults when i got to work and nothing new shows up. Driving "like my gran borrowed it" made no real difference.

 

I borrowed my colleagues laptop with full VCDS but it wouldn't connect to the car for a more in depth scan (Car isn't OBDII Compatible apparently)

 

Any ideas where i can look?? As i haven't changed anything apart from clearing fault codes i have absolutely no clue what could have actually changed! I'm due to make a drive to north wales on Saturday and if the mpg can't be sorted it's going to be a very expensive journey!!

 

 

Best brim the car, reset the mileometer and zero the computer and use the car for about 45 miles and brim again and see what mpg it is getting this week, or today.

Did you blank off the EGR completely?  as you will normally get a engine management light on as the computer doesn't pick up any air flow.

 

You can work around this by getting a plate from VAG group with a reduced hole.

 

 

I have completely blanked it (Cracked the Turbo to Cooler pipe while reassembling after Mr Muscle treatment) so blanked the Turbo outlet and the EGR valve to inlet with some 1mm Steel between the Pipe and the Turbo and Pipe and EGR Valve. Everything is still in place though) EML Light does come on but only the EGR/Boost codes are present which they have been for a few weeks anyway). I took the vac line off the EGR valve ages ago when it first went into limp mode in hope of lessening the buildup in the turbo.

 

I've had it upto redline a few times after Mr Muscle to try and clear everything out but hasn't made much of a difference to the limp mode (Hence now thinking its the control ring...great...)

 

Ill fill it up tonight then again tomorrow night, that should give me around 50 miles travelling. It's just strange how the cars reading has dropped so much overnight, it's always been around the same regardless of which engine issue it's had up until today!

So a 65 mile run about and refill shows a 36mpg which I didn't think was too bad is it was journeys to work and back twice and a 40 mile round trip. Getting from Norwich to Llandudno used just over half a tank which is about average for this journey. I'm thinking a sensor has gone, although nothing comes up on any code readers.....

Did you find any explanation? Im also having poor mpg...

In the OP's case, I think he was expecting miracles cleaning the inside of his engine with Mr. Muscle, FFS.

 

Plus doing mods he didn't have a clue what the consequences would be.

 

Instead he farked it up, how surprising....

 

Cleaning variable geometry turbos on tdis with Mr Muscle isn't that mad: https://www.briskoda.net/forums/topic/243533-the-mr-muscle-vnt-turbo-treatment-thought-we-needed-a-guide-of-sorts/

Many have had lasting success with it, myself included, on behalf of a workmate with a mk1Octy with ASV-code engine.