Tank to pump hose routing

[Zed Head]

On 1/14/2025 at 5:20 AM, Captain Obvious said:

Are you able to see the fuel pressure gauge WHILE you are driving?

For the time that you're spending on the problem it might be worth the length of hose and the clamps to get that real-time data.

Borrowed this from a Corvette forum.

[chaseincats]

1 minute ago, Zed Head said:

For the time that you're spending on the problem it might be worth the length of hose and the clamps to get that real-time data.

Borrowed this from a Corvette forum.

Ya, I'll give that a shot this weekend I'm thinking

[Zed Head]

On 1/12/2025 at 5:46 PM, Captain Obvious said:

I wonder if maybe you've got air in that line which somehow can't get purged out because of the routing. Not sure if that's a thing, but maybe something to think about and look into?

Maybe it's sucking air through the inlet side. Any signs of seepage back there?  A tiny liquid leak could be a big air leak.

[chaseincats]

27 minutes ago, Zed Head said:

Maybe it's sucking air through the inlet side. Any signs of seepage back there?  A tiny liquid leak could be a big air leak.

I'll give it another look, but nothing as of now and you can't smell gas.  We didn't see any leaks when we were under the car with the pressure gauge over the weekend.

[Yarb]

There are many connections on the harness that need addressing. AFM etc. Are you doing the work yourself or having it done. That makes a huge difference in moving forwards as far as cost goes and I truly understand. Looking back and have known what I have learned fighting mine for a very long time I should have done that first. You also have the sub-harness that others were mentioning. Those connections are critical temp wise where the ECU determines the richness. Replaced that harness as well although you can fabricate that yourself as well. All this will give you a peace of mind moving forward. I wish you luck. 

[chaseincats]

6 minutes ago, Yarb said:

There are many connections on the harness that need addressing. AFM etc. Are you doing the work yourself or having it done. That makes a huge difference in moving forwards as far as cost goes and I truly understand. Looking back and have known what I have learned fighting mine for a very long time I should have done that first. You also have the sub-harness that others were mentioning. Those connections are critical temp wise where the ECU determines the richness. Replaced that harness as well although you can fabricate that yourself as well. All this will give you a peace of mind moving forward. I wish you luck. 

Thanks.  All the sensors on the front and their connections are new.  It really doesn't make sense to me that the fuel line blowing can suddenly make a car running great suddenly have an issue with the EFI connectors but stranger things have happened.

[chaseincats]

7 hours ago, Zed Head said:

For the time that you're spending on the problem it might be worth the length of hose and the clamps to get that real-time data.

Borrowed this from a Corvette forum.

This is a dumb question, but I'm going to ask it anyway.  Wouldn't holding the pedal at 3k in my garage be the same as driving around or does the pump work harder when the car is under load?

[Captain Obvious]

10 hours ago, chaseincats said:

Wouldn't holding the pedal at 3k in my garage be the same as driving around or does the pump work harder when the car is under load?

It's not the same. It takes a lot less fuel sitting still at 3K sitting than driving around. The load is so much lower.

Try this... Sit in the driver's seat and with the engine running, push the gas pedal down until the engine is spinning at 3K. Note how little pedal it takes to do that. Way less pedal to do that than do drive around under load.

Hope you can make some headway with this issue. I'm sure you're tired of dealing with it.

[siteunseen]

 

 

These are important. Pull them apart and shine the connections up, maybe some dialectic grease too.

http://www.atlanticz.ca/zclub/techtips/runningrich/bullets.jpg

 

 

Edited January 23 by siteunseen

[chaseincats]

22 minutes ago, siteunseen said:

 

 

These are important. Pull them apart and shine the connections up, maybe some dialectic grease too.

http://www.atlanticz.ca/zclub/techtips/runningrich/bullets.jpg

 

 

i snipped those off and soldered on new connectors there a few years back 😞.  it definitely did make a huge difference though.

[siteunseen]

19 hours ago, Zed Head said:

For the time that you're spending on the problem it might be worth the length of hose and the clamps to get that real-time data.

Borrowed this from a Corvette forum.

This is easy to do if you already have a gauge spliced in. I put about 4ft of 5/16 hose between the fitting and the gauge. Unscrewed the gauge from the fitting, put the hose on the fitting with a good clamp, shoved the gauge into the other end of the hose and put on another EFI clamp. Zip tied it to driver's wiper arm and drove around for a day or two. Put the PSI numbers on here.

 

[chaseincats]

26 minutes ago, siteunseen said:

This is easy to do if you already have a gauge spliced in. I put about 4ft of 5/16 hose between the fitting and the gauge. Unscrewed the gauge from the fitting, put the hose on the fitting with a good clamp, shoved the gauge into the other end of the hose and put on another EFI clamp. Zip tied it to driver's wiper arm and drove around for a day or two. Put the PSI numbers on here.

 

That's a great idea since that is currently my exact setup.  I'll give that a try this weekend - thanks for that