I have a 95 4.3 that when you slow down to come to a stop or turn, It will die. It does this most the time when you drive it. It runs fine except for that. I have put new TPS, IACV, Fuel filter, and cleaned the EGR. I am stuck. Its my kids car and he is just wanting to get rid of it now. But it is a very good vehicle. Someone told me something about the torque converter.
Thanks and PLEASE HELP ME.

 

The first thing I would do run through the entire vacuum system, making sure that you do not have a leak.

 

I have also done that and there does not seem to be any. There are not alot of vacuum lines on the blazer , but there does not seem to be any that are broke.

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Blazer now seems to want to surge a little bit about 40. When you give it gas it doesnt react to it. Once again this does not always happen just most of the time. Thanks

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I forgot to add that now the check engine light comes on now. It says low voltage for the #1 o2 sensor.

 

Blazer now seems to want to surge a little bit about 40. When you give it gas it doesnt react to it. Once again this does not always happen just most of the time. Thanks

 

I forgot to add that now the check engine light comes on now. It says low voltage for the #1 o2 sensor.

 

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Now, low voltage sensor one could be caused by an exhaust leak ahead of the upstream O2 sensor (the one closest to the engine on the exhaust manifold). Do you hear any ticking? It is also possible that a plugged fuel filter could cause this, but that would have symptoms at higher RPM (higher fuel demand) as well.

How is the voltage at idle? It is possible that the voltage is dipping, causing inadequate voltage to the fuel pump, resulting in poor fuel delivery at idle...

I'm just throwing out ideas here.

 

Sorry for that,Wont happen again. I put a new fuel filter on. It also runs fine when I start it up and its in park. It now says both o2 sensors are bad.
My kid just told me that the fuel tank has a hole in it. He can only fill it about 3/4 full. dont know if that has something to do with it or not. Thanks again

 

The rear most O2 sensor is a catalyst monitoring sensor only. The only sensor that has anything to do with the fuel system is the upstream sensor which, as I said, is the closest one to the engine. Being a CPI motor, you only have one upstream sensor.

What are the codes that it is giving out?

 

P1133, P0131, P0133, and P0140 are the codes. Thanks

 

P0131 - HO2S Circuit Low Voltage Bank 1 Sensor 1
P0133 - HO2S Slow Response Bank 1 Sensor 1
P0140 - HO2S Circuit Insufficient Activity Bank 1 Sensor 2
P1133 - HO2S Insufficient Switching Bank 1 Sensor 1
For now, I would ignore the P0140 code and concentrate on the B1S1 codes. This looks like it is a sensor failure if not a large scale exhaust leak. I would first check over all of the wiring for damage. Inspect the exhaust system for any leaks. If the wiring appears to be good and the exhaust system has no leaks, then I would change the sensor.

As for sensors, I would recommend only using the AC Delco sensors. The price and availability of some of the other aftermarket sensors make them seem attractive, but it my own testing of many of these sensors, they are not as active out of the box as the AC Delco sensor in the same application. Initial activity of a sensor is a direct measure of its life.