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#1
05-17-2008, 01:48 PM
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4.3 vortec ,CPI
I,ve got a problem i thought i fixed but, it did not i was getting low power the sulfer smell and gas drinking problem. CODE 44,45 which turns out to go to o2
sensor so i was told so i replaced it ,reset the codes (disconect battery for 5 min.) and started it up got no codes and took off trying to blow the carbon out and got on interstate ran 55 for 10 min. to set the computer and bang same problem but now im getting no codes ,checked vacuum lines cleaned and check plugs and wires. ANy help would be appreaciated ,could it be my converter and if so is their a way to check it . thank you. 
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#2
05-17-2008, 04:44 PM
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Re: 4.3 vortec ,CPI
Welcome to AF.
The codes were rich and lean exhaust. Code do not say replace sensors but to check things out. Check fuel pressure for to high or to low and for a fast leak down, I would drive it a day or two and see if any codes come back. You may need to get it on a engine capable scanner and read out all sensors and fuel trims. How many miles and what year and engine code? How is the basic tune up? Good AC delco plugs and other stuff?
__________________
Remember proper testing gives us the answer to many problems. MT
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