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[Doctor Gollum]

Man up... Only need to remove the two coil pack bolts on the 135 bank and unplug it. Hoik it out by the plug socket, roll it out towards the wing and call it done

Takes longer to type than to do...

In my limited defence, I changed my plugs ever 20K, so four months or so... Bit of practice.

[omega2018]

Man up... Only need to remove the two coil pack bolts on the 135 bank and unplug it. Hoik it out by the plug socket

http://www.omegaowners.com/forum/index.php?topic=90670.0 

[VXL V6]

Any corrosion around the coils? on the 135 coil pack?

What was the plug like on 5?

Regarding the stalling, I doubt losing one cylinder (Cylinder 5 according to your DTC's) would cause it to stall, with the other symptoms i'd be pretty convinced that's a crank sensor failing.

[Doctor Gollum]

3.2 will run on 3. Doesn't rev particularly well mind

Can't see the 2.6 being any different

[omega2018]

Any corrosion around the coils? on the 135 coil pack?

What was the plug like on 5?

Regarding the stalling, I doubt losing one cylinder (Cylinder 5 according to your DTC's) would cause it to stall, with the other symptoms i'd be pretty convinced that's a crank sensor failing.

bit of alu corrosion dust around 1 which was very dry but nothing much, coil packs looked in very good condition, 3 and 5 rubbers and pit looked very clean thanks to the slight oil treatment.

couldn't get the plug out, my halfords set doesn't seem to have a socket that fits.  must have one somewhere as I changed all 6 30k miles ago.  have ordered some new plugs and will change them all and check for further oil at the same time. 

i think the misfire is a symptom of the stall not vice versa.  so yes it is looking like the crank sensor even though the fail symptoms are different to last time.  i'm reluctant to accept my lovely and quality Delphi crank sensor has failed after only 12K miles but forum wisdom of 'OEM only crank sensors' would be vindicated . 

could still be MAF though it has done 102K miles most of it without my care and attention.

[TheBoy]

If the MAF has had contact cleaner on it, that will soon be shagged, if not already.

Worth checking for oil, and state of plugs, and resolve any issue along the way.


Are the LTFTs deviating from 0%?

[omega2018]

If the MAF has had contact cleaner on it, that will soon be shagged, if not already.

Worth checking for oil, and state of plugs, and resolve any issue along the way.


Are the LTFTs deviating from 0%?

contact cleaner was of the 'no residue' type.

yes the LTFTs are out now here they are back in 2013:

Description   Value   Units   Min   Average   Max
   03 - Fuel System Status                
        Fuel System 1    closed loop    -    2.00    2.00    2.00
        Fuel System 2    closed loop    -    2.00    2.00    2.00
   04 - Calculated Load Value    2    %    1.96    1.97    2.35
   05 - Engine Coolant Temperature    208    °F    188.60    197.60    208.40
   06 - Short Term Fuel Trim - Bank 1    1.6    %    0.78    0.13    1.56
   07 - Long Term Fuel Trim - Bank 1    0.0    %    0.00    0.00    0.00
   08 - Short Term Fuel Trim - Bank 2    1.6    %    -1.56    -0.08    1.56
   09 - Long Term Fuel Trim - Bank 2    0.0    %    0.00    0.00    0.00

and now:

Description   Value   Units   Min   Average   Max
   03 - Fuel System Status                
        Fuel System 1    closed loop    -    2.00    2.00    2.00
        Fuel System 2    closed loop    -    2.00    2.00    2.00
   04 - Calculated Load Value    2    %    2.35    2.35    2.35
   05 - Engine Coolant Temperature    208    °F    208.40    208.40    208.40
   06 - Short Term Fuel Trim - Bank 1    -1.6    %    -1.56    0.65    3.13
   07 - Long Term Fuel Trim - Bank 1    1.6    %    1.56    1.56    1.56
   08 - Short Term Fuel Trim - Bank 2    -3.1    %    -3.13    -3.13    -3.13
   09 - Long Term Fuel Trim - Bank 2    0.8    %    0.78    0.78    0.78

what's that about then?

[TheBoy]

Assuming not LPG, carefully check for airleaks in the intake and exhaust.

[TheBoy]

Were those readings before or after you shafted the maf with contact cleaner, btw?

[TheBoy]

Leave idling 15mins, re-read the LTFTs

[omega2018]

Were those readings before or after you shafted the maf with contact cleaner, btw?

both. 

is there some theory behind MAFs being shafted by contact cleaner?

[TheBoy]

Were those readings before or after you shafted the maf with contact cleaner, btw?

both.

Great, so we're not fighting faults put on after, at the moment

is there some theory behind MAFs being shafted by contact cleaner?

Its ultimately a solvent. Everybody tries it once, thinking its smart, then grumbles GM want £250 for an unshagged one .  And contact cleaner has never, ever, ever fixed a hot wire type MAF.  So much (financial) pain for zero gain

[omega2018]

these symtoms are so different to last time my crank sensor went.  then it failed it start on very first turn about 1 times in ten, months before the failure.

then when it went completely, the car just wouldn't start 1 hour after a long run. not matter how many turns (i have a diesel size battery)  2 hours later it would and didn't fail again before i replaced it. 

this time its stalled while driving in traffic at about 2k revs and idles badly sometimes. feels very different to the last time.

so has anyone had the second symptoms only and fixed it with a new crank sensor?

[TheBoy]

this time its stalled while driving in traffic at about 2k revs

Were revs steady-ish at 2k rpm when the engine suddenly cut?

[Doctor Gollum]

Fuel pump?