1997 Blazer 4.3L V6 misfires when fuel level is low.
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1997 Blazer 4.3L V6 misfires when fuel level is low.
It runs better once it warms up. Recently replaced plugs and wires and had a wire routed incorrectly...re-routing seemed to fix the misfire but it's back. Looking for ideas on what the problem may be. Got a service engine soon light(Random: Multiple misfires detected).
#2
Did you do as I suggested and change the cap and rotor?
Did you change the fuel filter?
You need to do a pressure test on the fuel rail to make sure the regulator is ok.
Then what is the 8th digit in the VIN #? X or W. The will tell me what motor you have and fuel system. Cant remember what yr they stopped the poppets with the spider injectors.
What model is the blazer? 4x4?
Mike NJ
Did you change the fuel filter?
You need to do a pressure test on the fuel rail to make sure the regulator is ok.
Then what is the 8th digit in the VIN #? X or W. The will tell me what motor you have and fuel system. Cant remember what yr they stopped the poppets with the spider injectors.
What model is the blazer? 4x4?
Mike NJ
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Did you do as I suggested and change the cap and rotor?
Did you change the fuel filter?
You need to do a pressure test on the fuel rail to make sure the regulator is ok.
Then what is the 8th digit in the VIN #? X or W. The will tell me what motor you have and fuel system. Cant remember what yr they stopped the poppets with the spider injectors.
What model is the blazer? 4x4?
Mike NJ
Did you change the fuel filter?
You need to do a pressure test on the fuel rail to make sure the regulator is ok.
Then what is the 8th digit in the VIN #? X or W. The will tell me what motor you have and fuel system. Cant remember what yr they stopped the poppets with the spider injectors.
What model is the blazer? 4x4?
Mike NJ
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Cap and rotor has apparently solved the misfiring issue. However in the course of climbing all over the engine I managed to cause a vacuum leak in the intake leading to the loping and dying that I previously described. Found it! I don't know what it's called, but, it's a long black hardened polymer hose that runs from the intake into the top of the engine on the passengers' side...just had to push it back in and now it runs like its new! I will be changing the fuel pump as soon as I find a convenient time to do so. Thanks for the help!
#5
However in the course of climbing all over the engine
I think that tube is PCV (Positive Crankcase Ventilation) tube. Runs rough without it.
Glad its running good.
Mike NJ