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I was waiting for someone to point that out but didn't think it would be you :)

I'm well aware of the NB sensor's purpose and that a lack of feedback will cause problems with Vf however it's very unlikely to be causing this particular symptom. That's why I said "shouldn't". As for how the learned value is calculated perhaps you should review Toyota's documentation on the...

1) Yes. All brown wires in the car are grounds. However not all grounds are brown wires... 2) I see no blue/white wire in that diagram. Do you mean the black/white and if so what is the question again?

He claims to be getting spark. Belt may have jumped though...

Then what makes you think they're wired wrong?

As I said it could be lots of things. The system is adding fuel to compensate for an imbalance. It doesn't necessarily mean the mixture is lean although it could be. There's not much harm in this other than it may slightly effect fuel economy. First clear the learned value and see what happens...

Lmao. Touche...

Why don't you tell us how they're wired now and we'll go from there...

Mine was actually very low (measured by manometer) but it was in good health. In that case blade erosion might be less. Or so I reason. I dunno. Ah well...it's not my engine ;)

With it running past the valve covers on the way to the TB. One would think the direction of flow would prevent entry into the covers though.

There's lots of things that can cause high Vf but worrying about it at idle is a bit anal. What is it at 2500 rpm? And it's supposed to read zero when you let off...

Me too. Takes more than a few beers to make me happy :) Now you have me wondering how much dirt can enter through the PCV system...

True. Didn't think of that. What I get for having too many beers. For some reason they won't let me drink at work so I have to make up for it on my days off ;)

It does? Damn :) Most people put way to much stock in the TPS when it comes to driveability. Try it: once you get everything fixed warm the engine up, unplug the TPS, go for a drive and see how much throttle response is effected. There may be a slight hesitation upon tip in but there usually...

Yeah, I think the typical bypass setting on most filters for this engine is around 16 psid. And you're right, the cause behind his problem is all speculation without knowing more. Iirc the saddle material is pretty soft although I don't recall if it's babbitted. Been too long ;)

Kind of. When the ECU sees 5 volts it knows the idle switch has opened. When it sees 0 volts it knows the idle switch is closed. It uses that for a bunch of things, mainly for idle speed control and emissions fuel cut. The other part of the TPS is used to determine throttle angle. That part you...

The oil filter could have gone into bypass but studies have shown full flow filters don't do much of anything anyway. It's what makes the huge marketing behind them so amusing. A good air filter is far more important to the engine's health. That's my story and I'm sticking to it ;)

It does but that's easy for most oil filters, especially if they're changed too often which is what most people do. The tip off would be compressor blade leading edge erosion like the kind typically seen with K & N air filters.

6 of one 1/2 dozen of the other although his method is good in that it verifies the type of signal the ECU actually uses. You can also use rpm. There are several ways of doing it once you understand how it works and what the ECU requires. Not that it needs to be done very accurately for stuff to...

Or a POS air filter...