Missfire cyl 2 4 6, loss of power, stalling when hot

[wetherow]

Yes, I thought the same thing,
Possibly a ground connection, or ground wire in the loom,
Job for a good Multimeter !

And may have to back probe it to the ECU via the other connectors.

I've had a look at the fuel trim and it's 9% trim on bank 2 (cyl 2 4 6) not sure of that's normal. I had thought possibly blocked rail or contaminated fuel since its only on passenger side. previously it had been throwing cat converter codes P0420, p0430 as well as the P0300, P0302 ,P0304 and P0306. I've also considered possibly the cat is blocked on the passenger side but they're both expensive to fix so just after a bit of guidance as to how to further trouble shoot.

 

[wetherow]

also I have sorted the security lockout, I missed a lead when reconnecting the positive battery relay in the engine bay

 

[Fu Manchu]

You have a suspected blocked cat but you won’t remove it to inspect it? Confirming the blockage won’t cost you if you take it out and have a look. If it is blocked, you’ll know.

It sure would explain most, if not all, of what is happening.

If replacing a cat is expensive, wait until it does a number on the rest of the engine. Ooof.

 

[lout]

can you swap left and right cats

 

[krusing]

I thought I had a blocked (Passengers Side) cat when I had the O2 sensors triggering the DTC’s,
Removed it,
I purchase some cheap degreaser from Supercheap,
Sealed one end and poured the degreaser into it,
shook the shite out of it, like a cocktail.
And the amount of shite that it cleaned out was a surprise.
Flushed it with clean water,
Refitted it, and did a LONG road test to dry it out,
A lot of steam coming from the exhaust, one would have thought it was a head gasket leaking as I was driving,
The rest is history.

 

[krusing]

I've had a look at the fuel trim and it's 9% trim on bank 2 (cyl 2 4 6) not sure of that's normal. I had thought possibly blocked rail or contaminated fuel since its only on passenger side. previously it had been throwing cat converter codes P0420, p0430 as well as the P0300, P0302 ,P0304 and P0306. I've also considered possibly the cat is blocked on the passenger side but they're both expensive to fix so just after a bit of guidance as to how to further trouble shoot.

Have the Chains been replaced ?

 

[krusing]

can you swap left and right cats

Like your idea,
But are they interchangeable due to the angles of the sets.

 

[wetherow]

Have the Chains been replaced ?

yeah, replaced the chains last week.

 

[wetherow]

I thought I had a blocked (Passengers Side) cat when I had the O2 sensors triggering the DTC’s,
Removed it,
I purchase some cheap degreaser from Supercheap,
Sealed one end and poured the degreaser into it,
shook the shite out of it, like a cocktail.
And the amount of shite that it cleaned out was a surprise.
Flushed it with clean water,
Refitted it, and did a LONG road test to dry it out,
A lot of steam coming from the exhaust, one would have thought it was a head gasket leaking as I was driving,
The rest is history.

are the cats easy to get too on VE sv6? if so ill give that a go and have a squiz

 

[wetherow]

You have a suspected blocked cat but you won’t remove it to inspect it? Confirming the blockage won’t cost you if you take it out and have a look. If it is blocked, you’ll know.

It sure would explain most, if not all, of what is happening.

If replacing a cat is expensive, wait until it does a number on the rest of the engine. Ooof.

I thought it was the timing chain honestly. thanks for the info, the timing chain needed doing so thought id start there.