- Joined
- Oct 27, 2016
- Posts
- 2,618
- Reaction score
- 6,900
- Location
- MO
- First Name
- Spencer
- Truck Year
- 1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
- Truck Model
- Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
- Engine Size
- 225/6, 350 c.i., 350 c.i., 5.9l Cummins
I'm reasonably sure it its that rear cat causing most of the issues. I've been having a **** drive today where it seems to block up (can hear a lot of exhust trying to escape from a pin hole leak) and then I loose a heap of power and then she overheats. Dosent help when the weather has been hot either. I'm going to cut the cat off when I get home and see how it goes.
On a side note, I cannot figure out how the "egr" does anything as its not hooked up to the exhaust in anyway that I can see
The egr is connected via the intake manifold. In the cylinder heads there are cross over ports that run through the intake, so on a carbureted non egr engine the butterfly valve on the passenger manifold would be closed when cold and idling sending exhaust gasses under the carb to warm it up. So when egr's started to be put on engines they used that cross over in the manifold, so the egr gets exhaust gasses from the intake itself. Lots of times they get plugged up with carbon and other deposits and will stick open or closed and fail to function correctly.
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