92 S-10 Blazer

[BlazerLT]

if it is a CPI Vin W 4.3L, chances are the injector has went before valve overlap occurs which is hardly does with our engines.

Should be kept in mind though.

[blazermans-10]

Sounds like fuel line is leaking under the plenium(manifold) And Burning the gas
This Will Cause stinky smell at exhaust
Black smoke
hard starting ,will drive better at highway speed
set off oxygen sensor code (check engine lite)

The fix is replace the 2 fuel lines under manifold . The lines can be checked when the manifold is removed. by turning key to acc. on (not start) and look at hoses see if shooting gas.(Be Very Carefull Raw Gas ,Use Eye Protection) And No Smoking!!
They Are Very Easily Replaced.