FSI EM light comes on after refueling

The carbon canister is meant to be a lifetime item, it shouldn't need changing. Having said that, I have changed one on an A2 1.6 FSI, when I was getting petrol smells while driving. That didn't fix the problem, then I changed the evap purge valve - that didn't fix the smell - then I finally found a tiny leak in a hose where it was clipped!
Hi & thanks for this info.
I've checked all around my canister & don't see anything obviously naff & there seems to be no smells from that area when the engine is running.

Still waiting for my Xtool scanner to arrive & then begin the search for the problem codes. Have also got a new fuel fillercap to try as well, once I can read the codes 'live' whilst driving.

Car runs just great, but have noticed that instantaneous fuel consumption figure reads 5,7L/100 when motor is idling, which seems quite a high figure.
Has anyone else checked their ins. cons. at idle & could post what their figure is, please ?? My other (non A2) cars swop to L/hour display when they idle, so I can't compare like with like.
 
Hi & thanks for this info.
I've checked all around my canister & don't see anything obviously naff & there seems to be no smells from that area when the engine is running.

Still waiting for my Xtool scanner to arrive & then begin the search for the problem codes. Have also got a new fuel fillercap to try as well, once I can read the codes 'live' whilst driving.

Car runs just great, but have noticed that instantaneous fuel consumption figure reads 5,7L/100 when motor is idling, which seems quite a high figure.
Has anyone else checked their ins. cons. at idle & could post what their figure is, please ?? My other (non A2) cars swop to L/hour display when they idle, so I can't compare like with like.
When idling, my FSI DIS reads 00.00 mpg.
So, something is up. Any idea if your fuel consumption, from fill to fill is higher than usual? Any error codes are stored, and only clear when you clear them, so you don't need to scan in real time.
First scan, ideally just before a fill, make a note of the errors, then clear them. Scan again post fill plus a drive.
Mac.
 
When the car is not moving but the engine is running, while you know for sure that you are doing zero mpg, you can't actually extrapolate an instantaneous consumption figure in units of l/100km because no distance is being travelled - it's a divide-by-zero error. I believe the instantaneous value is itself an average across the last few seconds of data, which is why it takes a few seconds to get to 199mpg (in the UK) when you take your foot off the throttle while on the move. If the instantaneous function on the DIS doesn't support switching from l/100km to litres per hour when idling (ColourDIS does!), then if it's showing any figure it's probably based on the last value that was calculated, but logically it can be disregarded.
 
If it reads 5,7L/100, when idling, as @Hoomart does, that is indicative of a problem, either in the calculation, (based on injector size, and open time, I'd guess), or a fault in the Motronic ECU.
Mac.
 
When idling, my FSI DIS reads 00.00 mpg.
So, something is up. Any idea if your fuel consumption, from fill to fill is higher than usual? Any error codes are stored, and only clear when you clear them, so you don't need to scan in real time.
First scan, ideally just before a fill, make a note of the errors, then clear them. Scan again post fill plus a drive.
Mac.
Correction:
When idling, it sometimes shows - -. - - mpg.
But it can also show a random figure, like 64.78 mpg, or 47.64 mpg. My guess is that the displayed mpg is the last mpg as calculated when moving.
Mac.
 
Correction:
When idling, it sometimes shows - -. - - mpg.
But it can also show a random figure, like 64.78 mpg, or 47.64 mpg. My guess is that the displayed mpg is the last mpg as calculated when moving.
Mac.
Yes, I'd heard similar, which also seemed to fit with the general range of the l/100km figure that @Hoomart was talking about.
 
When the car is not moving but the engine is running, while you know for sure that you are doing zero mpg, you can't actually extrapolate an instantaneous consumption figure in units of l/100km because no distance is being travelled - it's a divide-by-zero error. I believe the instantaneous value is itself an average across the last few seconds of data, which is why it takes a few seconds to get to 199mpg (in the UK) when you take your foot off the throttle while on the move. If the instantaneous function on the DIS doesn't support switching from l/100km to litres per hour when idling (ColourDIS does!), then if it's showing any figure it's probably based on the last value that was calculated, but logically it can be disregarded.
Hi there, I agree it's not logical to have a logical mpg figure when not covering any distance, but my question was what does othere std DIS cars display when idling. I was off throttle atleast 5 seconds before coming to a halt, so the DIS did show 0.0L/100 ; I dipped the clutch at 1800rpm & then came to a full stop as quickly as possible (within 1 second). Then, at stationary idle the dispay showed 5,7L/100, which is obviously not correct.

I would like to know if 1) others doing the same procedure get a display that reverts to L/time, be it minutes or hours & 2) what that value is, so I can get an idea if the car is running rich or lean at idle.

For info, my displayed average l/100 is between 6.5 & 6.9 for my type of driving style & road conditions & has not changed since the EML has come back on. I do not have a problem with this range, but want to (try &) understand why the EML comes on (3 times now) shortly after refueling.

When myscanner arrives, I will do a full reset & then see how things evolve.
 
Hi there, I agree it's not logical to have a logical mpg figure when not covering any distance, but my question was what does othere std DIS cars display when idling. I was off throttle atleast 5 seconds before coming to a halt, so the DIS did show 0.0L/100 ; I dipped the clutch at 1800rpm & then came to a full stop as quickly as possible (within 1 second). Then, at stationary idle the dispay showed 5,7L/100, which is obviously not correct.

I would like to know if 1) others doing the same procedure get a display that reverts to L/time, be it minutes or hours & 2) what that value is, so I can get an idea if the car is running rich or lean at idle.

For info, my displayed average l/100 is between 6.5 & 6.9 for my type of driving style & road conditions & has not changed since the EML has come back on. I do not have a problem with this range, but want to (try &) understand why the EML comes on (3 times now) shortly after refueling.

When myscanner arrives, I will do a full reset & then see how things evolve.
I'm sure the scan will give us some idea of what we're looking for.
Mac.
 
I've now got my Xtool scanner & seen the folllowing faults ;
16500 - engine coolant temp sensor (G62) implausible signal - sporadic
17439 - intake manifoldtuning valve (N316) set point not reached - sporadic
17978 - engine start blocked by immobilizer - sporadic

As I don't know how long they have been there, I've done a clear of these messages & will now see how long it is before anything comes back.

I do know that the temp gauge doesn't reach 90 for quite a while in normal weather but it gets there more quickly in this current weather we are experiencing.
I'm not sure what effect error 14739 would actually feel like when driving the car, but will see how it runs from now on.
I know I once had difficulty starting the car, some 6 months ago ; needed to crank several times & eventually it started & has never had the issue since ; I guess that may have provoked the 17978 code.

I'm keeping the sanner in the car & will check things on a weekly basis to see if anything returns (or anything new appears !).
Will give a further report when anything changes !!
 
I've now got my Xtool scanner & seen the folllowing faults ;
16500 - engine coolant temp sensor (G62) implausible signal - sporadic
17439 - intake manifoldtuning valve (N316) set point not reached - sporadic
17978 - engine start blocked by immobilizer - sporadic

As I don't know how long they have been there, I've done a clear of these messages & will now see how long it is before anything comes back.

I do know that the temp gauge doesn't reach 90 for quite a while in normal weather but it gets there more quickly in this current weather we are experiencing.
I'm not sure what effect error 14739 would actually feel like when driving the car, but will see how it runs from now on.
I know I once had difficulty starting the car, some 6 months ago ; needed to crank several times & eventually it started & has never had the issue since ; I guess that may have provoked the 17978 code.

I'm keeping the sanner in the car & will check things on a weekly basis to see if anything returns (or anything new appears !).
Will give a further report when anything changes !!
Yes, good plan. Regular scan, make a note of codes, clear codes and repeat.
It does look like you have a faulty inlet flap mechanism. The Audi code would be P1031. It means that the potentiometer that monitors the position of the flap mechanism is indicating that the expected arc of movement is not being seen.
No shortage of reading matter on here about FSI flap mechanism on here, Google A2OC P1031.
I can't think of a link to filling the fuel tank though. Is it only when filling, or when starting with an engine up to temperature sometimes?
Mac.
 
Hello all,
diarmuidmaconald steered me in the right direction as I had this issue with intermitting petrol smell in my FSI since I had the engine rebuilt. It was a very tiny leak in a fuel line, that was finally visible only when, havine read that someone else had the same problem, my mechanic put a green tracer in the petrol and voilà, with the help of a Wood lamp the tiny, tiny leak was found... Now I need an original fuel pipe the replace the 'generic' piece of (high-quality) tube ftted provisionally, but the car doesnt smell like a travelling petrol station anymore. God knows how many issues have us FSI drivers anyway, so this is at least one less thing to worry about. Cheers! And thank you.
Stefano
 
Hello all,
diarmuidmaconald steered me in the right direction as I had this issue with intermitting petrol smell in my FSI since I had the engine rebuilt. It was a very tiny leak in a fuel line, that was finally visible only when, havine read that someone else had the same problem, my mechanic put a green tracer in the petrol and voilà, with the help of a Wood lamp the tiny, tiny leak was found... Now I need an original fuel pipe the replace the 'generic' piece of (high-quality) tube ftted provisionally, but the car doesnt smell like a travelling petrol station anymore. God knows how many issues have us FSI drivers anyway, so this is at least one less thing to worry about. Cheers! And thank you.
Stefano
Hi Stefano,

Are you referring to the metal tube from/to the high-pressure fuel pump to the manifold?

Evros
 
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