HPFP E-85 misfires

Randomaccess335 · 04-04-2019, 11:56 AM

I have been getting several misfires lately I have been on full E85 for at least four years, common misfires are cylinder 1,5,&6 but occasionally I get 2 & 4 so I took care of the usual suspects brand new plugs brand new coils but same issues. I put in a tank of 93 octane to find out that I no longer have misfires. I go back E 85 and I continue to get the same misfire.
I guessing High pressure fuel pump is going out I've been going back-and-forth from E 85 to 93 octane only get misfires with E 85.

I have not checked yet if I have leaky injectors not sure whether I should check those first or swap a new high-pressure fuel pump in.

Any ideas which I should do first thank you and advance
R
Also I have stage one in tank fuel pump upgrade

type-dRew · 04-04-2019, 12:08 PM

We could throw a bunch of guesses around to start or you can expedite the process with a datalog.

Also, stage 1 IN TANK? Do you have an additional fuel pump outside the tank or do you have an upgraded one in the tank?

Aside from the issue at hand, if you're running straight e85, it is a good idea to run gas through it every so often periodically.

Randomaccess335 · 04-04-2019, 08:01 PM

Stage 1
Fuel it stage 1 in line with lpfp
I'll upload A log as soon as I can

NoGuru · 04-05-2019, 06:33 AM

Quote:

Originally Posted by Randomaccess335

Stage 1
Fuel it stage 1 in line with lpfp
I'll upload A log as soon as I can

That's not enough fuel to keep up with running full e85. You can maybe run up to E50 with that setup.

Randomaccess335 · 04-05-2019, 07:29 AM

Maybe the stage one pump is wearing out I have to upload a log eventually but I was running full e85 for four years
My stage one kit was one of his first test kits

type-dRew · 04-05-2019, 07:44 AM

What back end flash are/were you using?

Randomaccess335 · 04-05-2019, 08:04 AM

E 85 race
I know it could be quite a few things but maybe that in-line pump is getting old seeing how it is four years old

tisdrew · 04-05-2019, 08:30 AM

Good, you've addressed ignition so we can table that.

0. Please post data logs showing high pressure, low pressure, AFRs, STFTs in a 4th gear pull. Additionally, there should be shadow engine codes from running your setup. Can you show us what codes you have?
1. Stage 1 pump shouldn't be enough to run e85 with higher boost demands. And yes, this in-tank/low pressure pump could be dying as well.
2. Check your fuel filter. E85 is never really 'pure' so all types of contaminants could be clogging this.
3. Have you ever inspected your FPR?
4. Data logs might help us determine if your HPFP is going out.
5. What index are your injectors?
6. Have you checked all fuel lines and connections going from lpfp to hpfp?

type-dRew · 04-05-2019, 08:31 AM

Really need the data log and then we can see a couple things.

Walnut blasted recently? Running straight ethanol for years, did you use fuel system cleaner periodically?

04-04-2019, 11:56 AM	#1
Randomaccess335 Captain 69 Rep 868 Posts Drives: 07' 335I Join Date: Mar 2011 Location: boynton beach, Fl iTrader: (11)	I have been getting several misfires lately I have been on full E85 for at least four years, common misfires are cylinder 1,5,&6 but occasionally I get 2 & 4 so I took care of the usual suspects brand new plugs brand new coils but same issues. I put in a tank of 93 octane to find out that I no longer have misfires. I go back E 85 and I continue to get the same misfire. I guessing High pressure fuel pump is going out I've been going back-and-forth from E 85 to 93 octane only get misfires with E 85. I have not checked yet if I have leaky injectors not sure whether I should check those first or swap a new high-pressure fuel pump in. Any ideas which I should do first thank you and advance R Also I have stage one in tank fuel pump upgrade __________________ JB4 G5 ISO , AR DP's, DO Meth kit Trunk Mount, ETS 5" Intercooler, M6 Rims, ER Charge Pipe, Fordged DV's, MMp relocated inlets, Ebay 4" chrome Tips, Lux Angel Eyes ********11.910 @ 117.091.851 60'*********
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04-04-2019, 12:08 PM	#2
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	We could throw a bunch of guesses around to start or you can expedite the process with a datalog. Also, stage 1 IN TANK? Do you have an additional fuel pump outside the tank or do you have an upgraded one in the tank? Aside from the issue at hand, if you're running straight e85, it is a good idea to run gas through it every so often periodically.
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04-04-2019, 08:01 PM	#3
Randomaccess335 Captain 69 Rep 868 Posts Drives: 07' 335I Join Date: Mar 2011 Location: boynton beach, Fl iTrader: (11)	Stage 1 Fuel it stage 1 in line with lpfp I'll upload A log as soon as I can __________________ JB4 G5 ISO , AR DP's, DO Meth kit Trunk Mount, ETS 5" Intercooler, M6 Rims, ER Charge Pipe, Fordged DV's, MMp relocated inlets, Ebay 4" chrome Tips, Lux Angel Eyes ********11.910 @ 117.091.851 60'*********
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04-05-2019, 07:29 AM	#5
Randomaccess335 Captain 69 Rep 868 Posts Drives: 07' 335I Join Date: Mar 2011 Location: boynton beach, Fl iTrader: (11)	Maybe the stage one pump is wearing out I have to upload a log eventually but I was running full e85 for four years My stage one kit was one of his first test kits __________________ JB4 G5 ISO , AR DP's, DO Meth kit Trunk Mount, ETS 5" Intercooler, M6 Rims, ER Charge Pipe, Fordged DV's, MMp relocated inlets, Ebay 4" chrome Tips, Lux Angel Eyes ********11.910 @ 117.091.851 60'*********
	Appreciate 0 Quote

04-05-2019, 07:44 AM	#6
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	What back end flash are/were you using?
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04-05-2019, 08:04 AM	#7
Randomaccess335 Captain 69 Rep 868 Posts Drives: 07' 335I Join Date: Mar 2011 Location: boynton beach, Fl iTrader: (11)	E 85 race I know it could be quite a few things but maybe that in-line pump is getting old seeing how it is four years old __________________ JB4 G5 ISO , AR DP's, DO Meth kit Trunk Mount, ETS 5" Intercooler, M6 Rims, ER Charge Pipe, Fordged DV's, MMp relocated inlets, Ebay 4" chrome Tips, Lux Angel Eyes ********11.910 @ 117.091.851 60'*********
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04-05-2019, 08:30 AM	#8
tisdrew First Lieutenant 98 Rep 300 Posts Drives: 2009 335i Join Date: Dec 2015 Location: Melbourne, FL iTrader: (0)	Good, you've addressed ignition so we can table that. 0. Please post data logs showing high pressure, low pressure, AFRs, STFTs in a 4th gear pull. Additionally, there should be shadow engine codes from running your setup. Can you show us what codes you have? 1. Stage 1 pump shouldn't be enough to run e85 with higher boost demands. And yes, this in-tank/low pressure pump could be dying as well. 2. Check your fuel filter. E85 is never really 'pure' so all types of contaminants could be clogging this. 3. Have you ever inspected your FPR? 4. Data logs might help us determine if your HPFP is going out. 5. What index are your injectors? 6. Have you checked all fuel lines and connections going from lpfp to hpfp? __________________ "Wheels and exhaust aren't a build"
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04-05-2019, 08:31 AM	#9
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	Really need the data log and then we can see a couple things. Walnut blasted recently? Running straight ethanol for years, did you use fuel system cleaner periodically?
	Appreciate 0 Quote