Recent content by Peva

You didn't read everything posted - that was already addressed. I quoted the FSM for two of a certain car I owned in the past - I actually posted (attached) photos of those statements in the FSM. It explicitly stated that the valves open to ambient air close with engine/ignition off. In...

Ahh! I feel better about the hopeful/jingoistic comment. 😬 Volume to surface area - yes, Good point. They need to make the fuel tanks long thin tubes sticking up through the roof - like a big straw. 🤣 As with most things, everything's a compromise of competing goals/requirements/laws of...

Makes sense about keeping higher levels of fuel to keep *ratio* of volume of fuel to volume of open space (air + other vapors) in the tank relatively high. On what you said about effects being different with fuel volume of car vs. less fuel volume with a lawnmower, I would say it's not volume...

Taking one more pass at this - I think where we're talking past each other is that you think there has to be a valve or breather left open to allow for fuel usage emptying the tank and the diurnal temperature changes, while I see in the factory service manual that the valves are in fact closed...

We're probably not going to agree. I addressed the differences and quoted the factory manual explicitly stating that the system is closed off to the atmosphere with engine off by the n.c. (closed when de-energized, i.e., ignition off) valves. With some further reading, I see that the diurnal...

I wondered about that too. Distillation does leave calcium behind.

Here's information from the FSM of one of my vehicles (see the 2 attachments including the evaporative emissions system diagram and some text descriptions). The only paths from the canister to atmosphere are through the purge valve (ports under vacuum to the plenum downstream of the throttle...

"Sealed" was too strong a word. You can fault me for oversimplifying to keep my post less verbose. 😁👍 (Putting on my tap shoes...) Car systems allow a controlled pressure relief, and of course, as you suggest, allow air to enter to displace the freed up tank volume as fuel is used. The...

I'll add one piece of info. to the discussion: A few years ago, I remarked on an automotive forum that it puzzled me that consumer lawnmower engines definitely have a lot of problems with old 10% ethanol fuel, but cars did not. A guy who frequented that forum and that worked on the technical...

Well yes - that switch is definitely wireless as it sits now. 😁 Good luck! 😱

Yeah - I thought about the possibility that CA would be a special case (evap system). Perhaps the Honda aftermarket sells only the 4-line pump to simplify their inventory system (one less part number and part manufacturing/sourcing variation that has to be managed) - perhaps the 4-line pump is...

On the purge line, I don't know the answer for sure (I'm not a lawnmower pro), but I try to be helpful. So I searched "fuel pump purge line" in the context of lawnmowers. Some resulting hits said that, while cars have purge lines as part of their (fuel) evaporative emissions systems...

And post #8: 👍