It's lean. You have to figure out why.
In late 1987 chevy went to fuel injection on ALL there engines. From 1987 down will have a carburetor.
When an engine backfires aka (burps) back through the carburetor this usually indicates a lean fuel to air mixture or an intake leak( which is more noticable at low RPM). When the an engine afterfires, aka (farts) out the tailpipe it usually means too rich of a mixture or unburnt fuel is entering the exhaust system
on top of the engine, under the air cleaner
Start and run, no. Cough, backfire, yes.
Backfiring is usually an indication of a lean condition. When it does it during cranking, it's probably timing related.
17-22 Hg
When a 1986 Chevy Caprice leaks oil through the carburetor, it typically indicates a problem with the engine's internal components, such as worn piston rings or valve seals, allowing oil to enter the intake manifold. This can lead to poor engine performance, excessive oil consumption, and potential engine damage if not addressed. Additionally, a faulty or improperly sealed carburetor could exacerbate the issue by failing to contain the oil. It's essential to diagnose the root cause promptly to prevent further engine problems.
The 1996 4.3L engine doesn't have a carburetor, it is fuel injected.
Chevy 409 is a big block V8 engine. It was produced by Chevrolet from 1961 to 1965. It was a 6.7L engine, with a single or dual four barrel carburetor.
If your engine has a carburetor the filter is in the supply line into the carburetor. If your engine is fuel injected the filter is right next to the gas tank in the fuel line.
Chevy stopped using carburetors on there engines in 1987. Your engine is fuel injected if it's factory. And the unit on the top of the engine that you call a carburetor, is really called a Throttle body