Resolving HPFP corn woes (black death/sticking spill valve)

[Tokay444]

Wanna bet?

[2.3speed06]

I guess we'll find out when I can make it down there.

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[speeding3]

Any updates on this looking forward to seeing results

[Enki]

I'm on the RP but it's too soon to say for sure. So far, so good. I'll have a final answer tomorrow most likely, with regular updates after that, so long as it doesn't shit the bed.

[Enki]

Pressure dropped off halfway through my morning trip; I will say, however, that while cruising on the freeway the engine was "kicking" quite a bit and AFRs were stable, so I take that as a sign that the pressure was trying to come back.

Also, the moment I got home, pressure started to return and at some point was even at target. While it doesn't last long, I hold hope for my next oil change removing more of the old oil which is what I'm thinking is the cause of the current issues.

That said, I'll be pulling the spill valve this afternoon to see if that is the only issue (which I'm hoping is the case). If it isn't, I'll be going back to 50/50 until sometime after next oil change (which will be in the next couple months, and will be RP again).

[Enki]

IT'S ALIVE!

Spill valve had a little sticky. 5 minutes and back at full gumption; 1/4 tank down, let's see how far this goes.

[He Hate Me]

Dunno if this has been discussed, but came across this. Willing to give it a try.

ULX110 Motor Oil E85 Ethanol Fuel Dilution Test - YouTube

ULX110 Motor Oil E85 Ethanol Fuel Dilution Test - YouTube

[Enki]

I can try that with RP too; I'm basically invested in doing the next 2 or so oil changes with it.

[He Hate Me]

Interested to see results of that, to see if it's even worth trying this ULX110. Because it could separate it when it's new but after some cycle through the engine it could break down and allow the E85 to blend with it.

So definitely interested to see how some RP unused mixes (or doesn't) with E85.

Finding this ULX110 looks to be a challenge in the U.S as wel...

[He Hate Me]

Found a contact in the U.S

ULX110 USA Manufacturer
Coolant Control Inc.
5353 Spring Grove Avenue
Cincinnati, Ohio 45217
U.S.A.
Toll-Free Phone: 1-800 535 3885

[Mfinlay04]

Originally Posted by Enki I can try that with RP too; I'm basically invested in doing the next 2 or so oil changes with it.

If the fuel pressure holds, it'd be interesting to see a UOA on the RP after 3000 miles or so. From what I've seen over at bitog rp sucks balls compared to pretty much ever other uoa for most cars.

But if it allows us to run 100% e85 it might be a trade off

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[He Hate Me]

I've also read the same things of RP breaking down pretty fast. I've seen a lot of people say it's good for a few runs down the track and it's broken down pretty fast.

Nevertheless, I'd like to see you mix some fresh RP and E85, and shake it and see how bad(or good)it "dilutes" begin with @Enki.

I have a feeling that any unused oil will separate E85, but it's finding an oil that works for a decent amount of time and how well it works inside the HPFP.

[Enki]

This UOA seems to be decent-ish:
Royal Purple 5W30 UOA

I'll know more for sure when I do my first UOA though; I've asked for two kits, so depending on the results from the first test, I may be changing the oil sooner/later.

[El_Diablo]

There are so many different types of RP that you really cant just say they all suck. Which version are you using currently @Enki;?

[Enki]

As stated in the other thread:

[El_Diablo]

I believe that is their HPS series which might hold up a little better over the long haul.

[Enki]

We will see. I've ordered test kit(s) from Blackstone.

[Enki]

So went out for lunch today, about 40 minutes round trip. Pressure fell out on the way back, but did the same thing it did the previous time; it fought to come back, so I'm pretty sure it's just the spill valve again.

I'll go clean it a little later and see what's up, but I'll probably go back to 50/50 until sometime after the next oil change before I continue testing it, or until the scraper gets built.

If it is just spill valve again (likely), then it's already a huge ass leap forward on this problem.

[Enki]

Update posted here:

Kings of Corn (HPFP + OIL)

[fullboostms3]

Any news in this issue? Started having the p0091 code and car won't boost and hpfp reading is at 60psi at idle. Wondering if anyone has came up with a fix, mods are stage 2 ots with cat less downpipe, tih, auto tech internals, cai, Cbe, turbo smart bpv, fmic. Any help would be appreciated

[Enki]

Epic first post brah.

[bladerunner10121]

Originally Posted by fullboostms3 Any news in this issue? Started having the p0091 code and car won't boost and hpfp reading is at 60psi at idle. Wondering if anyone has came up with a fix, mods are stage 2 ots with cat less downpipe, tih, auto tech internals, cai, Cbe, turbo smart bpv, fmic. Any help would be appreciated

Check the flux-capacitor for the HPFP.

I've seen the "stage 2 OTS" map short the capacitor and cause HPFP issues. If that's your problem good luck finding a replacement.

[mrmonk7663]

60psi at idle is pretty much the pressure from the in-tank fuel pump. Sounds like you might need to pull the hpfp internals and examine

[fullboostms3]

Ended up taking it all apart and cleaning the spill valve, and hpfp and no more problems. Thanks for the help though

[Cheapspeed]

I did not read all 12 pages because I don't feel like it. But just glancing on Mobil 1's website I found this QA:

Question: Which Motor Oil Is Best for Engines Using E85 Fuel I am using E85 fuel in a converted Honda engine originally not designed for its use. One of the primary concerns of this is the formic acid created in the event of water contamination of the fuel. I have always used Mobil 1 5W-20, but am wondering if Mobil Clean or Extended Performance would be a better choice for me. What Mobil oil has the greatest amount of acid neutralizers in it? -- Andrew Champion, Frisco, CO Answer: We recommend you use a heavy duty diesel product if you want additional acid neutralizer. We recommend you try Mobil 1 Turbo Diesel Truck 5W-40 as it is based on HD diesel technology, which contains additional over-based detergents for acid neutralization.

So it sounds like we're on the right track with our Rotella, still.

[SarcasticOne]

http://www.nulon.com.au/products/Ful.../#.VEl6g8szHqB
Found this here in Australia, looks like it has potential...

Meets the desox requirements and also states that it's ethanol happy!

Also comes in a 6L bottle (engine takes 5.7)

[Enki]

Originally Posted by Cheapspeed So it sounds like we're on the right track with our Rotella, still.

My original testing and my current local full corn tester refute that statement completely.

Originally Posted by SarcasticOne Full Synthetic 5W-30 Long Life Engine Oil- Nulon Australia Found this here in Australia, looks like it has potential... Meets the desox requirements and also states that it's ethanol happy! Also comes in a 6L bottle (engine takes 5.7)

Only one way to find out!

[Spectrix]

I wonder if an oils ability to withstand fuel dilution in a crankcase might make it even more prone to adding to black death/sticky problems in an MZR fuel pump. We see this with Rotella.