Golf 2.0 8V SE - POOR Fuel Consumption

**CraigR** · 30-05-2017, 06:50 PM

I'll give that a bash this coming weekend. Part of me is thinking I should just do a complete ignition service...

**CraigR** · 30-05-2017, 09:28 PM

Just had a read through the car's service history, and not only am I surprised the the service history is complete and never missed a service, but this car has had some serious coin spent on it!

However, this heavy fuel usage and rough running thing has been going on for years...

08/2007 - Running rough, black smoke. New o2 sensor
05/2012 - o2 sensor replaced, coolant temp sensor replaced
11/2013 - coolant temp sensor replaced, leads & plugs replaced, MAF replaced, o2 sensor fault code noted

Might get the car scanned and see what vcds can tell me. I don't mind spending a little bit of money on this car to get it where it needs to be.

**Umai Naa!!** · 30-05-2017, 09:48 PM

Check the evaporative purge solenoid on the charcoal canister, too.

It should start ticking away after a few minutes of running.

**CraigR** · 30-05-2017, 10:19 PM

I wondered what that was! Yep - ticks away once is begins to warm up.

**CraigR** · 07-06-2017, 08:18 AM

Took the car to VW and got it on the VCDS. They told me it looks like a new MAF is required, however it logged a lean condition, but you can smell how rich it is running. I've ordered a new MAF anyway in a bid to achieve more than 295km from a full tank of 95, which we just got yesterday. My main issue here is I plugged my ELM327 and using the Torque app, monitored what the MAF was doing and seemed to be behaving how it should.

**Bora Sport** · 08-06-2017, 07:46 PM

Someone may correct me if I'm wrong but I think you can unplug the maf and if it runs better when it is unplugged, it is sure sign that it is stuffed.

**CraigR** · 12-06-2017, 08:58 PM

^ I have heard that too, but someone said to only do it on short journeys, not sure why. I will give that a bash tomorrow though. I spoke with a VW tech, and he has been running his eBay MAF from China for months without any issues, it was only $23 so I purchased one as well. Doesn't need to last a lifetime, I'll replace it with genuine when required.

**CraigR** · 12-06-2017, 09:02 PM

I got an OBDeleven the other day so I scanned the car and got the following issues, which I later googled and seems to be a very common issue. MAF replacement and o2 sensors seem to be the culprits, but its a bit annoying it can't be pin pointed.

P1128 - Static - Bank 1, mixture adaptation (mult)
P0171 - Static - Fuel trim, Bank1

Definitely not running lean, I've never seen so much black smoke before haha!