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ea 81 Catalytic converter
Posted 23 March 2007 - 08:39 PM
On a positive note I did the rear disc conversion today! Thanks to those who have gone before and left instructions!
Posted 23 March 2007 - 09:49 PM
Hit the cat with your hand and see if it rattles. Last time i had to buy a cat for an ea81 i got it through jcwhitney.
Posted 23 March 2007 - 09:56 PM
I see magnaflow weld-ins on ebay every now and then.
Posted 23 March 2007 - 10:06 PM
Posted 23 March 2007 - 10:08 PM
Starts up from cold very easily. Get almost 30mpg. Runs nice and cool. I'm new to subarus, but I think its running very well. The cat that is on there say subaru on it so I figure it is 24 years old.
I was wondering about the egr valve. Not really sure how to test it. I took the vacuum line off the egr and put a vac gauge on it. I was able to pull 7-8 in, with no load and reving the engine. I put the vac on the egr itself and I applied vac directly to the egr the engine wanted to stall out. I assume this means that the diaphram in there is working to some extent.
If anybody has any advice, I'm listening. I really dont want to shell out for a new cat if I dont have to. Thanks.
Posted 24 March 2007 - 01:50 PM
Posted 26 March 2007 - 11:40 AM
Running lean would cause high NOx (but it would also cause excess HC) but you might want to check your EGR, that is one of the emissions systems that controls NOx emissions... did it fail the NOx emission @ idle or @ high speed?
Yes it only failed nox at both idle and high speed. Hc and co were both fine at low and high speed. I pulled the egr and it holds a vacuum. The vacuum signal going to the egr gets up to 8 in. You can stall the car at idle by opening the egr with your finger, so the passages should be clear. I did clean them as well. I ordered a new catalytic converter ($165).
I'm not sure how much vacuum the egr is supposed to have at various rpms, but when I had the egr off and put a vacuum of 7 in on it, it opened.
I'm considering lower heat range spark plugs with the new cat. I'll post my results. If all else fails I'm just going to have to do an EJ swap:banana:
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