Re: carburation and jets
I always used a vacuum gauge. Tuning by ear is good to a point, if your hearing is not screwed up by listening to loud music. When using a vacuum gauge, the gauge will indicate where your engine is set best. And the sound will be good. Also make sure you have no vacuum leaks.
1995 Black S-10 X-Cab 4.3 CPI. '96 Jimmy 4dr Power-leather seats. '97 Camaro gauge needles. '98/99 Bravada core support, headlights and grille. Envoy bumper cover and fog lights. 2" drop spindles. Headlight wire upgraded with relays. Blazer floorshift and console. '96 Blazer leather steering wheel and air bag. '96 Jimmy leather door panels. 310,xxx miles. ZQ8 steering box. SS Mirrors.