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ASK3L

S4 B6 Missfire

The last few days I've only started the car once every second day and not done any real miles. On start up it has been like a bag of bolts on 3 cylinders, after 30 seconds it runs fine. Just the battery or?
Cheers
S4Max

Have you scanned yet?
madmax2

could be a temp sensor out of range, reporting the engine as warm when it isnt.

in oldskool language...car is starting without a choke.
ASK3L

Cheers guys. Scanned using a Vgate scanner and got a G62 coolant sensor error PO117. Started fine today but will get a new sensor after the holiday
madmax2

yay me.
how do I know it? coz mine started doing it this week too, and I scanned it yesterday


VAG-COM Version: Release 409.1-S

Control Module Part Number: 8D0 907 551 D
 Component and/or Version: 2.7l V6/5VT      01 0002
          Software Coding: 05711
           Work Shop Code: WSC 13360
1 Fault Found:
16501 - Engine Coolant Temp. Sensor (G62): Signal too Low
       P0117 - 35-00 - -

when car is dead cold (sometimes) it'll idle bad and lumpy for a few seconds.
ASK3L

There I was thinking you were just a genius
So the G62 sensor is the way forward, Have you done yours yet?

madmax2 wrote:
yay me.
how do I know it? coz mine started doing it this week too, and I scanned it yesterday


VAG-COM Version: Release 409.1-S

Control Module Part Number: 8D0 907 551 D
 Component and/or Version: 2.7l V6/5VT      01 0002
          Software Coding: 05711
           Work Shop Code: WSC 13360
1 Fault Found:
16501 - Engine Coolant Temp. Sensor (G62): Signal too Low
       P0117 - 35-00 - -

when car is dead cold (sometimes) it'll idle bad and lumpy for a few seconds.
Ian_C

Not the easiest job.  However, I did mine myself in the end after a garage quoted me two hours labour to do it.

Some info in this thread, credit to Monodude

http://audisrs.com/about41804.html

Import info - you *MUST* ensure you have a new O ring seal and the circlip with the coolant sensor itself

And far far easier when the engine is stone cold!

Changing it from above, you have to do it by feel one handed from memory.  I couldn't get the old circlip off, so ended up 'sacrificing' the old one by flicking it out with a screwdriver.  There is nowhere near enough room to get pliers in there to pull the clip off sideways.

The O ring will almost certainly stay in the housing when you pull the old sensor out.  Dunk the new O ring in some neat coolant, makes it much easier to fit the new sensor into the housing

I recall I tied the new circlip to a baton of wood with a length of cotton, so if I dropped it I wouldn't lose it down the back of the engine etc
ASK3L

Thanks Ian
Monodude

 Yeah its not a bad job, its probably a good time to drain out the old coolant and put some new stuff in. This is easy as you will see a drain plug on the water pump housing.

The best tool for removing the old clip is an L shaped tool. I have an L shaped flat head screw driver. This made easy work of sliding the old plastic clip out.

Remove all the rubber pipes for the PCV & give them a clean while you are in there. Also makes room to work on the coolant sensor.

Cheers

Al
JimGreen

Monodude wrote:
 Yeah its not a bad job, its probably a good time to drain out the old coolant and put some new stuff in. This is easy as you will see a drain plug on the water pump housing.

The best tool for removing the old clip is an L shaped tool. I have an L shaped flat head screw driver. This made easy work of sliding the old plastic clip out.

Remove all the rubber pipes for the PCV & give them a clean while you are in there. Also makes room to work on the coolant sensor.

Cheers

Al


Exactly a Monodude explained, I did one of mine a while back. Scared the hell out of me after I'd spent so much on the engine.

Hope your doing well Monodude, been a while since we chatted at Castle Combe a couple of years back. Regards Jim
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