Mine horibly misses when its wet out and will even stall if its raining real hard enough. Its done that for awhile now. Ever since I moved to ferry actually. After you changed her cap and rotor was it all good again?

 

Yea it usually cured it. BUT...it may not yours. Could be wires, coil, worn plugs. But it does sound like the secondary side of your ignition system needs some work.

 

Give it a good full tuneup, using the right parts.

btw, what is the secondary side of my ignition? Is that the cap and rotor etc..? never heard any of it called the secondary side of ignition ha ha ha

Also, the more deeper I dive, the more I find out. Such as those autolites that are in it now, are copper plugs. And from what ive seen here and there, copper + Blazer = big no no. The wires, I inspected lastnight after it got dark, seen no arcing from them or the cap.

 

If you divide the ignition system in half, The primary side would be everything on the low voltage side of the coil. In the old days, it would be all the wiring, ignition switch, battery, points and condensor. Secondary side would be the high voltage side. Coil, Coil wire, distributor cap and rotor, Plug wires and Plugs.

The coil is basically a transformer. In the electrical world, the primary side of the transformer is the side you would supply power too. The transformer does it's magic and the power comes out of the secondary side.

The primary side and secondary side both have their unique problems. Back in the day when you had to tweak stuff every 3000 - 5000 miles, it was important to understand the problems each side could have. That way when it misbehaved, you could actually cut your troubleshoot in half and get the job done quicker.

 

Ahhh i see. That can work out better for me since im more of a mathmatical, divide and conquer kind of guy.

Well ill give it a full tune up using delco parts for the secondary and see what happens.

Thanks for the assistance. Definitely takes my full blown migraine down to a headache hahahaha

Ill keep you posted as to what happens.

 

talking nice to it doesnt hurt either.

 

Im always talking nice to it. I have good 15-20 minute conversations with him.. its probably not mentally healthy to be able to talk to your vehicle for 20 minutes though.. oh well. My blazer is my baby and he knows it. Hes more spoiled then my wife and child combined.

 

not that your problem really sounds like what I've experienced in the past. but check your fuel pressure. I replaced about $1000 in crap when I got a p0300 & it turned out to be the fuel pump.

 

I really hope you figure it out. It sounds exactly like what I had going on in my 96 4.3 4x4. I had it at the chevy dealer and they did a full continuity test on all wires. They checked for spark. They did fuel pressure tests ect...they said your CAT is broken inside. Replace it and it will fix it. So I replaced it with a direct fit magnaflo and magnaflo muffler with larger tail pipe. My blazer sounded great but it did not fix my problem. They they said the fuel pressure is way too low. These blazers need a lot of pressure and it has to stay high. I started with the chepest thing. I changed my fuel filter out(couldnt even blow air through it and sludge came out.) and also had my fuel lines flushed and a portion replaced. The problem was still not fixed. So then I had my fuel pump and fuel pressure regulator changed. Did not help. Then I changed my plugs,wires,cap,rotor. Problem still was not fixed. So I said screw it and replaced the really expensive injectors. PROBLEM FIXED. I guess it could have been a combination of things but the way these spider injectors are,when one is off it throws them all off. So I got a random cylinder misfire. Once I replaced them it idled at 2,000rpm. After about a minute it worked its way down to normal. I took it for a spin and the check engine light blinked a lot of times(I didnt count...I was freaking out) and then it went off. It took a few drives to "re-learn" but now my gas mileage is way up,oil doesnt smell like gas.
So in a nut shell do not count out the injectors. My blazer has 150k and the fuel pump,filter,cap,rotor and injectors were all original. Good luck.

 

Thanks, the fuel pump actually did fix it. Before i got to that though, I replaced the plugs, distributor, TPS, fuel filter & had the spider upgraded from the cpi to efi ($$$). Finally I took it to the dealer. They checked the fuel pressure & it was low / all over the place. New fuel pump did the trick.