Can Bus flex question

[GL95]

Think of it this way, if you turn off the garden hose with no end on it and leave it on the ground, it will gravity gulp until the remaining water runs out onto your lawn. If you place the end of the hose submerged in water, even though it's trying to gravity draw down, it can't move very much because it has to replace the displaced water with air and it doesn't have an air source to gulp.

Sure it makes sense in theory, but then why are there 4 other people including a vendor saying they have air in their lines with this system

I'm going to move the sensor to the feed to the passenger fuel rail this weekend and install a fore check valve after the fuel filter, if that doesn't fix it I'll pull the hat and see what's going on inside, but from watching install videos for a few minutes it appears it comes preartached to a hose going to the botttom of the bucket

Sponsored

 

[Angrey]

Sure it makes sense in theory, but then why are there 4 other people including a vendor saying they have air in their lines with this system

I'm going to move the sensor to the feed to the passenger fuel rail this weekend and install a fore check valve after the fuel filter, if that doesn't fix it I'll pull the hat and see what's going on inside, but from watching install videos for a few minutes it appears it comes preartached to a hose going to the botttom of the bucket

Suit yourself. I'm giving you an easy check as to why you're having issues. I have a radium bucket with a return line and an ethanol sensor on the return side and no check valve and I don't have issues. Why not simply check to verify they plumbed it correctly?

 

[K4fxd]

Sure it makes sense in theory, but then why are there 4 other people including a vendor saying they have air in their lines with this system

Maybe that is the way they designed the system? or it was installed wrong all 4 times or it is correct and you have an air leak somewhere else.

 

[GL95]

Suit yourself. I'm giving you an easy check as to why you're having issues. I have a radium bucket with a return line and an ethanol sensor on the return side and no check valve and I don't have issues. Why not simply check to verify they plumbed it correctly?

Because my tuner does not want to tune any further with the sensor in the return line anyway, so either way I need to move it

It's not like im saying that's a bad idea, just easier for me since I need to move it anyway, but I agree that is probably the most likely source of air, if there even is air

 

[GL95]

Maybe that is the way they designed the system? or it was installed wrong all 4 times or it is correct and you have an air leak somewhere else.

Thanks for the insight

 

[GL95]

So pretty much as expected, I added a check valve and moved the sensor to the feed line and I have zero issues with the set up now.

I did take a video of what the car did prior just to post here as example in case anyone else has an issue but for whatever reason the video will not load to the site

 

[Angrey]

So pretty much as expected, I added a check valve and moved the sensor to the feed line and I have zero issues with the set up now.

I did take a video of what the car did prior just to post here as example in case anyone else has an issue but for whatever reason the video will not load to the site

Everyone suspected that would resolve the issue. The reason most don't employ this solution is because it adds unnecessary restrictions to the feed side. If you have additional pump capacity beyond your power level, that's probably not a deal breaker.

Point is, all across the nation, tuners and enthusiasts put the sensor on the return line and when plumbed properly, doesn't create this condition. I suspect the return line in your hat is NOT plumbed optimally and you have an air gap between the return line end and the fuel level. Which is potentially creating the voids and introducing air into the return side. The other reason that you might want to check the plumbing inside the bucket is if the return feed is air gapped it will create splashing and turbidity inside the bucket. Again, not usually a HUGE issue but you want the fuel that surrounds the pump pre filter to be as unaerated and consolidated as possible. With a hard enough flow, it could actually foam inside the bucket. The pump inlets are at the bottom so again, probably not a HUGE deal, but something you might want to double check, JUST to ensure that it's never an issue.

Sponsored