Yes, M112 engine. ( R170 platform )

As to the 2 rear hangers, that what wire cutters and a new set are for

 

Actually if you were able to separate the pipe at the rear cats, the muffler section will swing backwards somewhat and the hangers are way easier to get off and on then.

James

 

Thank you

and

DOH!

 

Thanks, I had to cut the bolts even with the exhaust off car , I had no chance of separating it, they where a right mess. Everything was so rusted I couldn't tell what was bolt and what was clamp. I jacked the muffler up to release a bit of tension on them and removed the two rear splash shields which made things a bit easier and help save my remaining knuckles.

 

I got the exhaust apart today and found that cat 2 bank 1 has no cat in it, it also had a drill hole in the casing. I was a bit confused as it seemed very smooth and clean to have had the cat taken out but it wasn't long before I heard something rattling around in the muffler, gave it a shake and out drops a piece of cat


Pre cat sensors

Post cat sensors

Something missing

Something found

 

Turns out the misfire trouble was due to the remaining rear cat on bank 2. A 24 hour soak with the occasional in and out, in a mix of detergent, citric acid and water done the trick. I rinsed it out for over for over an hour but soapy suds just kept coming out, I gave up in the end, I think the cat absorbs the detergent.
Unfortunately I never got to the bottom of the DTC's
Anyways thanks for the input everyone and hopefully this might help others out.
Tommy.

Forgot to mention, since cleaning the contacts on the ESP unit the warning light has not been back.