Maf again??

[centurion]

Hi all 2.7 TDi 2001 or there abouts
Can anyone confirm that this may be a MAF fault before I start doing the checks described in the workshop downloads.

Outside temp -14 startup fires ok but runs like a bag of hammers and misfires for a couple of minutes. It then smooths out a bit and idles reasonably well.

Set off on the journey which within 1 mile involves a steep climb it is now missing a little bit and obviously the power has dropped away but not enough to stop it climbing the hill at a reasonable speed 30ish easing off the throttle a little seems to help. Then the engine management light comes on but no further drop off in performance. By now the temp guage is up to working temperature. As we crest the hill onto the flat it seems to run normally and has no problem with the next climb. The management light stays on. I drive about another couple of miles no probs.

Stop the engine restart it the management light goes out as usual and off we go no misfire lack of power or any other difficulties. Will running with the engine management light on do any damage?

I have also noticed when switching it off it really seems to clunk to a stop which I wasnt sure it did before

Any advice greatfully accepted.

Regards Centurion

 

[clivvy]

check the codes, see what its reporting, even though it goes out. if it comes up MAf error, there you go. I wouldnt say that was just the MAF, but with the weather being as cold as that, I do wonder...

 

[lacroupade]

could easily be fuel starting to go at that temperature, depends how long you've left it standing about without using it...

 

[Jocky]

Easy way to check MAF is unplug it:augie

If it runs gutless the MAF is working, if no change the MAF has failed:thumbs do the check when the engine is at normal temp not cold.

Failed MAF doesn't bring on MIL light on in a T2

 

[centurion]

Thanks for that, if it is the fuel waxing, I have read elsewhere that it helps to add about half agallon of petrol per tank fill or half a litre of white spirit.

Any thoughts on this.

Cheers Centurion

 

[lacroupade]

Thanks for that, if it is the fuel waxing, I have read elsewhere that it helps to add about half agallon of petrol per tank fill or half a litre of white spirit.

Any thoughts on this.

Cheers Centurion

No idea if it helps with waxing, again it depends on usage I think....my truck has been stood in -18C for a couple of nights with no problem apart from a little lumpoy tickover for the first 10-15 seconds....but longer exposure without the tank being agitated from use could make things worse...