Knock sensor

You are welcome.

Roy

Roy, I got the fuel pressure test done and it was 47 and dropped to 45 but did not go down anymore. I hit the gas a few times and it did not go any lower. The book says 55/61.

That is correct. You need a fuel pump.

That will make a good difference in the running.

Roy

I just replaced the whole thing in June.

Does not matter if you replaced it yesterday. You need a pump.

Roy

Why would the live data say that O2B1S3 when I only have one sensor on bank 1?

Do not worry about that as there is no sensor 3 anywhere.
That is the tool.

Okay.

It should be under warranty if you replaced it in June.

Roy

Bought it on eBay, but I will look into it. Thank you

You are welcome.

Try rock auto they have warranties that they stand behind.

Roy

I will look into it. But let me ask you a question, if it is the pump, then why do I not have any problems starting in the cold mornings? Most of what I see on bad pumps shows a long duration of start time before starting, mine starts really quick. And what does the pump have to do with my timing being off like it is?

The pump has enough pressure to start but does not supply enough fuel to the injectors and the ECM sees that. That is why it is running lean.

The long term trims at 25% are the key. Running very lean.

Roy

Roy, seeing as though my timing is off as it is, would that or a low voltage at the pump cause my readings to be low?

Forget the timing, we are way beyond that issue.

Yes, low voltage could do it but I doubt it very much. There would be other issues if that was the case.

Roy

Well, I guess so I guess that is it then! Winter is setting in and I work on it outside, so I will have to wait until spring to pull the bed and the pump. Thanks for the help.

You are welcome.