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Possible simple fix 200 1979

Yeah, I wish my 79 had an 02 sensor or just the hole for one. I've got it in my mind to pull the headpipe and weld on a bung.

On the back of the manifold, probably where yours is, I have an EGR pipe with a fitting that looks like the M18 1.5(?) needed for an O2, but now you know how far I went to try it. The two manifolds are different.

Last emissions go-round I had with the car was OK on NOx, but too rich, so I backed the 3mm screw about one flat to get it passed. I hate trying to go by ear, when retests cost money. I think my 79 is the same as California's newest Volvo owner's.


--
Art Benstein near Baltimore






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