All Things Mk5 > How to Guides / Troubleshooting

Poor idle

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JASGTI:
So after spending the day doing the following
Cambelt kit
Water pump
Thermostat
Chain kit
Full service
Dsg service
Cam lobe
Alt belt
Alt tensioner

I now have poor idle, not enough to show on the revs but you can see and here it almost like it has cams in it.

Has a good pcv valve as swapped it with a perfect running one off another mk5 and it was still the same.

No light on but do have codes P2008 and P3138.

Do I need to perform basic settings on the inlet flaps as iv had the battery off for a day or two?

Any help please as was working fine before I did 'maintenance' .

Cheers Jason

colesey:
Air leak from cam cover gasket or dipstick?

FJB:
My bet would be that you have disturbed the loom/connectors just underneath the flaps motor when doing the thermostat, easily done when moving the pipe bracket.

pudding:
Yep, those codes do point to intake runner control and would definitely affect the idle quality.

You can run an output test with VCDS on the runner control motor and you can see the linkage arm moving up and down when all is good.  If no action there, you need to investigate the wiring.

JASGTI:

--- Quote from: Pudding on September 06, 2021, 05:56:45 pm ---Yep, those codes do point to intake runner control and would definitely affect the idle quality.

You can run an output test with VCDS on the runner control motor and you can see the linkage arm moving up and down when all is good.  If no action there, you need to investigate the wiring.

--- End quote ---

Just carried out a basic setting test and it appears to be moving. After clearing codes and driving to work today still have p2008 and p3138.

Thinking it must be aur leak somewhere dip stick maybe as it's still got the old orange one, if not keep hunting for a leak. Can only be slightly ad the revs don't move on the dash and no eml lights on plus if you just rest your foot on the pedal it's fine . :thinking:

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