To diagnose a fuel delivery concern: observe the long term fuel trim value on the OBD-2 scan tool

What abbreviations am I looking for? There is a Gallon Per Hour Usage on there... G.P.H

There is a voltmeter on the Scan Tool but there is usually a number of 13.6 – 13.8 volts... not sure if this coincides with the O2 perimeter your referring toÉ

I know the IAT number, but I’m not sure about the ECT Value..

 

Thanks, I've had my far share of expenses which include but not limited to;

Cooling system; Fan housing, fan, thermostat, electricals..

Power Steering Pump,

Power Steering Fan,

Sunroof Leak which ruined the electricals,

New Clutch & Assembly,

Steering Rack & Upper/Lower columns,

Front and Rear Wiper Motors,

Tie Rods,

New Tensioner,

Airbag light issue..

All within a year (2007)... getting frustraded, every time I want to do something to the car - something breaks and the funds go to that breakdown.

In total roughly 8000k has been spent in repairs/labour at 110/hr with BMW.

 

Having heard about the scangauge from this forum and not having one myself I decided to look at the tools capabilities: It provides the ability to read and clear codes as well as display freeze frame data; additionally some models can be programmed to request additional data from $MODE1 (also known as data stream).

IMHO most users probably will not get involved with trying to program the tool. The data stream information, is where one gets to watch all the values related to all the sensors involved with the engine management!

Personally I use the AutoEnginuity scan tool. It provides a simple point and click solution to access all nine $MODES of the OBD-II standard. This system can be had for about $250. And if you would like you can add the BMW enhance option which covers MINI; this will give the power to go beyond just engine management. For example I have access to all eight computers in my stock 2002 R50.

 

If you are using the scangauge, it will be necessary to program the unit to retrieve the information, I was not aware of that at the time I made the suggestion.

The long term fuel trim is listed as LTFT; short term fuel trim is listed as STFT; the O2 parameter is listed as B1S1 (bank one sensor one) the first sensor on bank one before the CAT (MINIs only have one bank)

The MPG values that you see are related to fuel consumption, 13.6-13.8 is referring to the battery voltage. You will likely need another scantool capable of reading $MODE1 (A.K.A as data stream); if you are able to get your hands on such a tool the boost parameter is the one you would be interested in to determine if there is a boost concern. good luck and I hope this helps!

 

Very useful thread. Very much appreciate the expertise offered here.

I've been experiencing a progressive drop in the volume of the supercharger on my 06' MCS, to the point where it is almost inaudible.

I've communicated with Eaton about it and they had nothing of value to offer. I've been learning more about the bi-pass valve as a result of my investigations and am beginning to suspect it may be the culprit here.

Admittedly I cannot perceive a drop in power yet, but as this has come on gradually, I may simply have grown accustomed to it and not noticed a drop.

Anyone have any thoughts on this?

Thanks

 

Thanks a lot Frenchie!

Just a update frenchie, I get a strong smell of gas at start up in the morining when the car has been sitting for quite sometime. Bad 02 Sensor?

I'm not very mechanicially inclined so it is likely that I'd have to take it to a shop that can get the vaccum reading(s), and the required data to narrow down the problem.

As per lastnight, I was coming around an off ramp and I was holding it at 4k and gave it to'er all it did was slowly (as compared to before) pick up speed as it felt like it was not even supercharged - yet there was a faint sound to the s/c itself.

My guess guys as what many of you have been saying it sounds like there might be a leak some where? Or a Bad Bypass Valve? But with a strong smell of gas at a cold start-up?

It's my understanding that the O2 would play a big part in all of this with regards to the correct air/fuel mixture?

I wish I could just go out and troubleshoot but I'd be liable to mess something up...

 

My MCS will bein the shop again tomorrow for that nice clicking sound that needs to located. So far they have changed the Thrush Bushings and the upper strut mountings on both sides. I think the problem is the axle's and they will be done tomorrow. After reading this post I also looked at the MAP on the scanguage and the most I could get was 24.6 at 6k rpm wot. I have a feeling I am also having a BPV Issue and I am going to have the dealer look at it.

 

Let us know eh?! That would be great! Thanks! Hope its not costly..

 

hi guys im from over the pond in the UK ive recently noticed a drop off in power in a big way ,same symptoms lack of thrust when i nail it and supercharger is all quite and im getting my butt whooped by cars that are half the power ,i had a friend who is a master tech at my local ford dealership and he agreeded there was a problem and he checked all possible boost problems and he said it was the BPV but didnt have the part to swap out ,getting to the point this thread has been so usefull and my friend has said this helped to check the problems quicker ,so as we say in the UK CHEERS MATE

 

Hey there, I did exactly as you said but there was no "funny noise." However the miles and time showed back up like nothing ever happend. Did it reset the ecu or did I miss something?

 

2003 MCS just under 60K, went out and did the BPV jiggle test, the actuator arm should be normally closed Spring pressure and the cam should be on the stop. With cold engin off; my cam was maybe 50% and the full actuation of the lever (depressing diaphragm) felt "chunky" and rough. OEM Bypas is just under a hundred bucks and the Detroit Tuned BPV looks very enticing for only $30 more. but how much gas am I going to waste for that $30, and how many smiles am I going to get with it? How responsive is the OEM BPV to the VGS mod?