Dodge Repair: Blazer Stalling, fuel filter replacement, chevy blazer

Question
Hi and thanks in advance for your help.

I know that you specialize in Dodges, but I was wondering if you might be able to help with a Chevy too. It may not be a Chevy specific problem. If you can’t help, thanks for considering it. I apologize for the lengthiness.

I have a 96 Chevy Blazer, 4x4, four door, with a 4.3 vortec and automatic trans. I purchased it around last September, and about a week later is when the trouble started. While cruising down the interstate at normal speeds for maybe ten miles, I hit the offramp and started to accelerate and it just lost power. It was like I completely removed my foot from the gas pedal. After a few seconds, and after turning the a/c off to maybe help the situation, it seemed ok. But if I immediately pressed the gas a bit harder, it would do it again After maybe less than a mile, it seemed to be back to normal.. So the first thing I did after a couple of these same instances was to replace the fuel filter. At that point, it began to get cooler outside, and didn’t have the problem again, so I figured the fuel filter replacement fixed the issue. So all winter and until about a few months ago, it was fine. Then it started again. Checked the fuel filter, blew right through it like a straw. Soon after, the check engine light came on, so I took it to autozone, and it showed a bad o2 sensor on bank 2. Had my brother replace it, but forgot to tell him it was bank 2. He obviously replaced the wrong one, but the engine light didn’t come back on for a while, so I dismissed it. So it’s coming back on again, and after talking to a friend about a rattle underneath at startup, we determined it was the catalytic converter. It was bad. Thought that was it, but guess what. So then I noticed a pattern. It would only act up when the fuel level was less than a half tank. It would never do it at half or above. I’ve tested it over and over again. So the engine light comes on again, this time it’s the map sensor. Changed it and it’s still doing it. The funny thing is it seems to do it after I’ve been sitting at a red light for a few moments, and then accelerate. Always when I accelerate. With the a/c going too. When I shut down the a/c, it seems to help a bit. It did it today, but after it did it, it was fine, and wouldn’t do it again even after!
 I pushe
d it. Twice it shut off a while back and it wouldn’t immediately crank back up. It sounded like it was dieseling or jumped timing at that point. The rpm’s would go high and low. Then it would crank and be fine. Thought about changing the fuel pump, but wanted to check this out before I spent anymore money on this. A mechanic friend of mine seems to think it’s the pump or some trash in the gas tank. But I get a different story from other people. So, it seems it’s doing it only when it’s hot outside, and at half tank or less.
I understand you may not nail the problem on the head (or you may), but any suggestions would be appreciated.

Thanks again, Chris


Answer
Hello
you are louseing prime on the gad it could just be a lot of dirt in the tank or bulding up moistore in the tank this would explainy it at galf a tank in hot weather . before you drop the tank i would go to the parts store and get some dry gas will clear up mostouer
And give it a week and then let me know what happens

pete