Catalytic converter red hot

tony123 · Post by **tony123** » 20 Sep 2011, 06:14

Just installed a Cylinder head on Volvo 1996 960,replaced O2 sensors,Catalytic converter red hot. What would be dumping fuel. Car also knocks.
Any hints on the ususal suspects?

Post by **vjaneczko** » 20 Sep 2011, 09:58

Is it a generic cat or one specific for the 960? Same question for the O2 sensors.

danr960 · Post by **danr960** » 20 Sep 2011, 14:55

How is it running? Check for vacuum leaks, temp sensor, maybe even the knock sensors? How do you know it was glowing? Was it dark? Did it run a long time, would the convertor you took off glow? I don't know about that, never looked at a hot convertor at night.

It very well might be running lean, so check the vacuum lines, also check for functionality of the air valve in the air filter case, the one that will draw air from a hot exhaust manifold.

DanR '94 964 360,000 miles (126,000 on the new engine)

tony123 · Post by **tony123** » 20 Sep 2011, 21:52

Is it a generic cat or one specific for the 960?Specific to 960
Same question for the O2 sensors= Bosch - Said Oem eq (generic)
How is it running? Like it is skipping
How do you know it was glowing? I was beet red in broad daylight
Did it run a long time, less than 10 min was trying to make sure pressure was up

would the convertor you took off glow--yes

Will work on it again this weekend Car is in Columbia I am in Charlotte

Post by **phils94850** » 21 Sep 2011, 03:43

sounds like you could possibly have it out of time causing the other problems.. how did it run before the head replace ?

tony123 · Post by **tony123** » 21 Sep 2011, 19:11

Ok until my daughter blew the head gasket

tony123 · Post by **tony123** » 30 Sep 2011, 18:18

I got around to testing after all of the rain I have a P304 code. I pulled offf igniton coil from number 4 cyc,.Still ran the same > I switched the ignition coil from 2 to 4 still ran the same. What could it be?