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Help diagnosing random, sudden power loss
I have a recently transplanted 2001-ish 6 liter in a 66 LandCruiser that I'm have had trouble with since the install. At random times, it's like the power goes out completely for a fraction of a second or several seconds - then goes back to running fine.
I've attached a log file. When it does it you can see the (narrow band) O2 go to zero and then the short term trims start to climb - but the engine keeps running the entire time. I have a manual fuel pressure gauge that is showing steady pressure. It is not related to throttle position and can happen at any time. Where do I look? Are the O2 sensors telling the truth? If they are, why is the engine still running. I only sense the loss of power for a very short period of time, but the O2 sensors and trims continue to act like there's no fuel in the system for much longer after that. Are there other parameters I could be looking at that might give me more information?
Peter