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I got this in an email and he wanted me to post this up. I dunno the answer.
A coworker of mine has an old S-10 that originally had a "fuel injected" 2.8 - I suspect that it was throttle body injected, not multiport. He recently swapped a carbed version of the same motor (it was the only one he could find locally) into the truck and apparently it runs okay, but he's burning up spark plugs like crazy. That makes me think "lean mixture" right away. I know he knows how to tune carbed engines, but I suspect that he may have overlooked the fuel system external to the engine bay. I don't think that the fuel pump/filter/lines got swapped along with the motor. I'm nearly positive the carbed version would need much less fuel pressure coming in than the TBI motor, is that correct? What I'm struggling with is how running too much fuel pressure to the carb could cause a lean condition. I know extremely little about carbs (I'm into fuel injected VWs), do you think it could be possible that excessive fuel pressure to the carb could cause it to run lean?
A coworker of mine has an old S-10 that originally had a "fuel injected" 2.8 - I suspect that it was throttle body injected, not multiport. He recently swapped a carbed version of the same motor (it was the only one he could find locally) into the truck and apparently it runs okay, but he's burning up spark plugs like crazy. That makes me think "lean mixture" right away. I know he knows how to tune carbed engines, but I suspect that he may have overlooked the fuel system external to the engine bay. I don't think that the fuel pump/filter/lines got swapped along with the motor. I'm nearly positive the carbed version would need much less fuel pressure coming in than the TBI motor, is that correct? What I'm struggling with is how running too much fuel pressure to the carb could cause a lean condition. I know extremely little about carbs (I'm into fuel injected VWs), do you think it could be possible that excessive fuel pressure to the carb could cause it to run lean?
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