cat converter glowing red problem, with temp measured

Before you start changing everything, get a set of compression readings to be sure you don’t have a leaking valve. Leaking exhaust valve or timing out will cause this

 

there can only be one thing causing popping in the exhaust - gas

doesn't make sense that a weak or failing fuel pump would be pumping excess gas into the exhaust to me. Injectors are last line of regulation after fuel pressure regulator.

 

So you are now back to injector or a coil. Take the bottom cover off the engine, start car from cold and take the exhaust temps using a laser as the engine warms up- you are looking for the odd one out

 

Since in a previous post you mentioned new coils and plugs were installed, you could try swapping the coil with an adjacent cylinder and see if the misfire moves to that cylinder. If not, then try moving injectors. While you are doing these procedures, I would be examining the condition of the connector plugs to cylinder #2, and the pins, to ensure they are okay. I have heard of pins not locking in the connector, so each time the connection was made the pin was pushed back not making good connection. (btw, I am not a mechanic, just a hack do it yourselfer)

 

Any misfire is going to put unburnt fuel down the exhaust.. Any way of checking the supply volts at each coil

 

Or one of them is misfiring?


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I think I would be solving the problem of the glowing red cat before racking up another 200 miles.

 

if you have 2 identical 360s and you're concerned one of the cats is no good and you know the other one is good, why not swap the 2 cats between both cars and see if the good car has glowing cats after the swap.

 

He could also remove the catalyst that glows to inspect for damage internally. But there may still be a problem with the way the engine is running. Glowing catalysts are usually an issue with something the engine is doing. Are there exhaust manifold test ports on the 360 exhaust manifolds (there are on a 355)? If so, check the exhaust readings. Maybe there is a cam timing, fuel or ignition problem that is not yet detected.

 

Now you have good compression readings, changed coils etc we seem to be back to injectors.
Either an injector is pouring fuel into 1 unit or you have a problem with the fuel metering to the units- not sure how it works so cant help on that one.

 

I would be very tempted to pull the injectors and get them cleaned and balanced.
It’s not a lot of work, and pretty cheap. On 15 yr old cars, it should prob be part of a maintenance regime. It was a pretty common thing to do on our twin turbo stealth/vr4s.

And I’d still be tempted to swap the coil from the offending cylinder with one from another bank to see what happens.

After that, I’d focus on the cat.