Crud in my fuel system?

[Papa]

My car has been on the road for a bit over two years now. My car started to have some drivability issues that I suspected were related to the fuel system, and I've been gathering parts to completely redo my fuel lines. While working with a tuner trying to see what we could do with the Sniper, I discovered that the internal fuel pressure regulator in the Sniper had failed, and I was seeing 100 PSI in the Sniper (explains why it was running so rich). I replaced the internal regulator and I'm getting the proper 60 PSI now. The internal regulator has a small screen filter on it and this is what that looked like:

https://thefactoryfiveforum.com/attachment.php?attachmentid=161846&d=1644078716

I suspect this is likely due to running non-PTFE lined fuel lines (braided -6AN). So, I will proceed swapping my fuel lines as planned. I also invested in a different 10 micron filter with a much larger filter surface. I just spent $8k on a stack injection and want to protect that investment any way I can. Should I be looking at anything else besides what I'm already doing?

[michael everson]

I would also check the little "S" rubber line that conects the pump to the hanger. I have had a couple of those fail.
mike

[Papa]

I would also check the little "S" rubber line that conects the pump to the hanger. I have had a couple of those fail.
mike

Thanks, Mike. I have a new pump and Pro-M hanger waiting to go in the tank.

[PNWTim]

Papa - I read your thread quite a while ago and can't quite remember what you used for fuel lines but when I built my car I first ordered Russel braided fuel line but then realized through forum commentary, reading, etc. that those traditional fuel lines definitely break down from the ethanol component in today's fuel. I ordered PTFE braided line and although a little different to work with when using AN fittings was pretty happy with the result. My lines are a combination of NiCop and braided and I have no fuel odor and there's nothing to break down. I was excited to see you went with Jim's setup as it is my plan also! Good luck.

[Papa]

Papa - I read your thread quite a while ago and can't quite remember what you used for fuel lines but when I built my car I first ordered Russel braided fuel line but then realized through forum commentary, reading, etc. that those traditional fuel lines definitely break down from the ethanol component in today's fuel. I ordered PTFE braided line and although a little different to work with when using AN fittings was pretty happy with the result. My lines are a combination of NiCop and braided and I have no fuel odor and there's nothing to break down. I was excited to see you went with Jim's setup as it is my plan also! Good luck.

Thanks,

I used Fragola -6 hose and fittings. The hose is rated for all fuels but is not lined with PTFE. I later became aware that although rated for various fuels, long-time exposure to Ethanol can cause the rubber lining to break down. I was going to run SS hard lines but may just make new braided lines with PTFE lining.

[egchewy79]

Keep in mind that the PTFE flex lines are slightly smaller than normal braided SS lines and you’ll need new hose separators. The AN fittings are different as well. I had fragola build custom lines for me through mike forte

[D Stand]

These guys have a bunch of good information on fuel lines.


https://hotrodfuelhose.com/

[BRRT]

Does Colorado still mandate some unusual fuel mixtures? If so, that could impact hose and component selection.


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Jeff

[Papa]

Does Colorado still mandate some unusual fuel mixtures? If so, that could impact hose and component selection.


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Jeff

Most pumps are 10-15% ethanol, but there is a new "trend" where we are starting to see ethanol-free gas available at some stations.

[efnfast]

Thanks,

I used Fragola -6 hose and fittings. The hose is rated for all fuels but is not lined with PTFE. I later became aware that although rated for various fuels, long-time exposure to Ethanol can cause the rubber lining to break down. I was going to run SS hard lines but may just make new braided lines with PTFE lining.

that's what you get for not using aeroquip hoses unfortunately.

17yrs later and my aeroquip hoses were still fine for fuel and coolant.