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Nox readings nosedive down, down, down 240 1990

I put in rebuilt Amm. No noticeable mpg gain with that. Then just regular maintenace. I do have the egr but I didnt touch it. Except for removing the pipe from the manifold, and putting it back when I resealed the manifold. EGR Pipe appeared properly attached as I removed it. Not leaking.
All is tight now, and the car runs much better.
To find those leaks you have to get down there and do some serious eyeballing. Lots of little cracks and crannys.
A small inspection mirror and a good source of light as well.

Happy motoring.






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