Radiator busted, now misfires on cylinders 5 & 4

[paramax55]

Go old school. Pull the plugs and see if 4 and 5 look any different than the others. Also, is it overheating now? If you warped/cracked something, it should be blowing exhaust gasses into the cooling system - especially something bad enough to throw all those codes.

[jac]

Originally Posted by paramax55

Go old school. Pull the plugs and see if 4 and 5 look any different than the others.

Thank you, great idea! I just checked them all. Not a ton of difference between them all. #4 did have a bit of oil on it. Photos below.

Originally Posted by paramax55

Also, is it overheating now? If you warped/cracked something, it should be blowing exhaust gasses into the cooling system - especially something bad enough to throw all those codes.

No, not overheating at all. If I don't accelerate quickly and just drive it like I am going for my Sunday morning drive, it behaves ok. It starts throwing the codes and complaining after I step on it.

[jac]

I did the smoke test (using a cigar), and did not see any smoke escaping anywhere.

However, I do see that the system does not hold pressure very long (whatever pressure I can manage to apply with my small handpump), is that normal? I assume not as it is supposed to build a vacuum?

The balloon I used to connect myn hand pump's outlet hose to the "Rubber boot with resonator" deflates in about 2 minutes. So, not a quick leak, but definitely not holding. Note that, for this test, I did cap off the small outlet that's on the "tube elbow" that connects to the throttle housing assembly.

I will try the smoke test again when it gets dark as it is easier for me to see the smoke at night.