Got misfire code 1998 blazer what do i fix - 1998 Chevrolet Blazer

If it was just cylinder 2 or 3, the code would be 0302 or 0303. Instead, you have random misfires (probably) such that you should be checking things that affect the whole engine. Vacuum leaks, bad plug wires, bad coil(s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. Yes, a battery can be good enough to start your car but still be bad enough to affect performance. If I had to guess, I would start by testing the ignition module. Most parts stores can test this if you remove it and carry it to them.

po300 is the code for multiple cylinders misfiring Probably tuneup time

If it blinks and goes away, it is a "random misfire" that culminates before the light begins blinking. Sustained misfiring will result in a code, and the light staying on. If the light blinks and goes away, the issue is intermittent. Your problem usually occurs under acceleration or heavy load. The issue can often be solved with new spark plugs, though it could also be dirty injectors. The injectors on that vehicle are infamous, however I have been able to fix your problem with repeated use of highly concentrated fuel system cleaner. I use at least 3 times the recommended concentration of whatever cleaner. People rave about Sea Foam. I have used it and it works -- though I can't say whether it worked better than other brands I have used. I have owned 3 Blazers and 2 S-10's, including my current 2001 Blazer LT.

first check the plug and wire i have seen the distributor caps do some funny stuff as well

Here's a link to your code P0306. P0306 Cylinder 6 Misfire Detected

Random cylinder misfire. How does it run? When is the last time it had a tune-up?

i had same problem distributor gear becomes worn replace it and will most likely fix your problem they are known for distributor issues

CYLINDER 4 MISFIRE...

check your plug wires for tears and dont overlap them

you are getting a misfire and 99% of the time you need a tune up
plugs and wires and clean your throttlebody