4.3 vortec engine misfire

SOURCE: engine miss firing

Check compression on engine and if that's good then check injectors(may be bad) . The key to use when checking compression with a compression guage is NOT have your reading be more than psi difference between cylinders. For example is cylinder #1 is 150 psi and cylinder #2 is 172psi then there is a problem like a burnt valve or something . From my experience these types of misses usual come from bad plugs, wires or bad injectors. Good luck and thanks for using FIX YA

SOURCE: 2001 silverado 4.3-v6 miss fire

check the coil pack

SOURCE: Only when it rains, I get an engine misfire and the check

i had the same problem with my truck...(i have a 99 silverado 4.3L also) i took off the cap, cleaned all of the electrical areas on the inside of the cap and rotor....and put a small thin layor of die electric grease on it all....then before i put the cap back on...i ran a bead of silicone around the cap surface that seats to the distributor...and i havent had a problem for the month that i have done that......hope this helps!

SOURCE: i have a po 300

PO300 - Random/Multiple Cylinder Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak
- The ignition signal circuit is open or shorted

Solutions:
- Perform Injector Service
- Replace Spark Plugs
- Replace Injectors
- Replace Ignition Coils

SOURCE: 4.3 L vortec firing orcer and wiring diagram

need firing order for a 95 chevy 4.3 vortic engine thank you