suddenly rough idle

[dwitczak]

I have a 96 blazer with 4.3 engine. The engine is new, but due to leaking oil lines, and me forgetting to check oil, I ran it 3 qt low. Now the lifters are constantly rattling. That is backround info.

Yesterday all of a sudden the idle went really rough. Just after I started it up. There is a loss of power when pulling out from an intersection. But it seems ok at curze. I though maybe EGR, I replaced the gasket and cleaned the egr with carb cleaner.

The spark plugs, wires and dist cap are only 1 yr old with about 15k miles on it. The engine was replace witha Jasper about 17k miles ago.

Is it vaccuum, egr or what?

I am sorry to ask a question which surely has been asked before, but I am confused with the Google search engine on this website.

*also the check engine light now flashes at me, before this it stayed on. The autozone guy said it was, "random miss fire" & "too lean" there might have been a third error.

[TheBrettster]

is it missfiring at all.

[dwitczak]

It is real rough idle, but it appears to cruise just fine. I am not sure how else to describe it or to find out if it is actually misfiring. Something suddenly changed on it yesterday. I turned the engine off and 20 minutes later when I started it up there was the rough idle. It actually makes the truck shake at an idle.

[Jon Teeter]

Could be EGR.You said you cleaned it.Was it bad(build up)if it was try cleaning the ports that go into the intak