[bacon_45]

Hey all, today I was giving it gas (wot) and I had fuel pump cut outs. I was going around 60 mph when the car cut back and I heard two super loud pops and power was cut off. I am on the OTS e30 map, anyone else experience this?

[grassy_91]

I’m not tuned through BM3- I’m with Mission Performance, but I experience this only when I add too much e85. Even with the help from meth injection I still get the cuts. Best advice I can offer to you is to pump maybe .2-.5 gallons less and see how it runs from there. You don’t have many other options at the moment besides WMI/CPI. Hopefully we’ll be able to get some better fuel pumps soon

[bacon_45]

Originally Posted by grassy_91

I’m not tuned through BM3- I’m with Mission Performance, but I experience this only when I add too much e85. Even with the help from meth injection I still get the cuts. Best advice I can offer to you is to pump maybe .2-.5 gallons less and see how it runs from there. You don’t have many other options at the moment besides WMI/CPI. Hopefully we’ll be able to get some better fuel pumps soon

Thanks for the advice brother. Just wanted to see if I was alone, hopefully we get some fuel solutions soon

[OzBMR]

Hey bacon_45 any logs of when it happened? Did you have a drivetrain error? If so what code and did you have, did you have to clear the code to reset the fuel pressure or did it just dump boost close the throttle and then go back to normal?

I've had cuts from the high pressure fuel pump dropping too low with too much boost and E30 and E40 and also had a different one recently related to low pressure fuel pump "adaptions outside of valid range" when testing an E40 set up. The HPFP ones self re-set the LPFP adaption one set a code 11A030 and I had to clear it using the MHD tool then everything went back to normal.

[B58togo]

One thing I’ve experienced with the E30 flash is that as soon as I hit reserve (49 miles to empty), I don’t make full power anymore. The car is markedly slower and I can only hit around 360 on the power guage. As soon as I fill back up, I’m back to the full 480 and the car’s back to full power.

[Solid67]

Originally Posted by B58togo

One thing I’ve experienced with the E30 flash is that as soon as I hit reserve (49 miles to empty), I don’t make full power anymore. The car is markedly slower and I can only hit around 360 on the power guage. As soon as I fill back up, I’m back to the full 480 and the car’s back to full power.

That's really weird because I have been running Stg 2 E30 for three months now and I've never had that happen to me. I still haven't had my HPFP crash and I usually run E35. Lowest its ever been is 1500psi.

[Cringe]

I’ve had it happen to me a couple times when I was running E36 in the first week or so of switching to the E30 map. Now I just run as close to E30 as I can and I haven’t experienced it again. I guess it depends on your HPFP.

[Solid67]

I believe I experienced my first fuel pump cut out tonight. Was in sport+ M3 and I floored it and the car pulled then stuttered and pulled a little more than power went kind of dead and a warning came up saying drivetrain malfunction and power output reduced. I pulled over and turned the car off then turned it back on and the message came up again, but I did some pulls in 5th and it felt fine.

What I didnt realize was that it was 52f outside and after I got home I turned on my Dragy and DA was -227. I can only imagine how bad the HPFP dipped.

[bacon_45]

That hasn't happened to me, but when the fuel cut happens do not push through it. As soon as you hear feel the stuttering and the low pops, stop giving it gas. Those CEL's are worrying to be fair..

[Solid67]

Originally Posted by bacon_45

That hasn't happened to me, but when the fuel cut happens do not push through it. As soon as you hear feel the stuttering and the low pops, stop giving it gas. Those CEL's are worrying to be fair..

To be fair when I first started the pull it felt more like throttle closure since my car suffers terribly from it. So that's what I thought was happening it was only after that it started to really stutter and jerk then the warning sign came on and the car lost power.

Drove to work this morning and the car is perfectly fine. Used BM3 to read codes again and nothing is there. To me, it seems anything under 60f will crash the HPFP.

No worries though, CPI kit should be in today.

[bacon_45]

Originally Posted by Solid67

To be fair when I first started the pull it felt more like throttle closure since my car suffers terribly from it. So that's what I thought was happening it was only after that it started to really stutter and jerk then the warning sign came on and the car lost power.

Drove to work this morning and the car is perfectly fine. Used BM3 to read codes again and nothing is there. To me, it seems anything under 60f will crash the HPFP.

No worries though, CPI kit should be in today.

glad to hear that brother, it seems like everyones fuel pump varys, some guys running e50 without any issues and me over here a little over e30 getting those nasty cuts.

[kern417]

Originally Posted by Solid67

To be fair when I first started the pull it felt more like throttle closure since my car suffers terribly from it. So that's what I thought was happening it was only after that it started to really stutter and jerk then the warning sign came on and the car lost power.

Drove to work this morning and the car is perfectly fine. Used BM3 to read codes again and nothing is there. To me, it seems anything under 60f will crash the HPFP.

No worries though, CPI kit should be in today.

Your boost spike is likely causing the throttle closures and the fuel cuts. you were spiking over 20psi, right? I don't have any of these issues on E30, but i verify my ethanol content and mix every other fill up. I target e33.

[SC_B5X]

Get an ethanol test kit so you know what the E85 content is and then use an E85 calculator. I personally use one that uses excel, i'll attach a link below if you'd like to download it.

https://docs.google.com/spreadsheets...it?usp=sharing

[Solid67]

Originally Posted by kern417

Your boost spike is likely causing the throttle closures and the fuel cuts. you were spiking over 20psi, right? I don't have any of these issues on E30, but i verify my ethanol content and mix every other fill up. I target e33.

Hey man sorry I missed this. You are correct that the boost spike (sometimes as high as 22psi) is causing throttle closure issues (sometimes gets as low as 39%). I also test my E85 every so often (only get it from one location - Mobil) and it's tested at E83 consistently.

My fuel mix usually puts me at about E35-E36 (rather be safe than sorry). The whole issues with throttle closure is definitely a tuning issue on PTF side. I thought I was the only one with this problem but other forum members have said the same thing happens on the Stg 2 93 map as well. Not sure why PTF has the boost spike so high instead of it ramping up in a linear fashion. Another issue is that I am running straight piping from the turbo back (ER Catless DP + MPPSK Exhaust) which is definitely not helping the boost spike issue. I even get low burbles in comfort mode and slight pops. Again, from what i've read and talked with other forum members, its due to being straight pipped.

Regardless, I havent had any fuel pump cut issues until the weather dropped into the 50s. Even in the 60s it comes close but still holds. Anyway, I was supposed to get my oil changed Monday at the dealer, but had to postpone it until tomorrow. I've talked with my mechanic and we are going to install the CPI kit next weekend. Once it's installed, I'll get to work with F80Paul and then post a full review.

[kern417]

Originally Posted by Solid67

Hey man sorry I missed this. You are correct that the boost spike (sometimes as high as 22psi) is causing throttle closure issues (sometimes gets as low as 39%). I also test my E85 every so often (only get it from one location - Mobil) and it's tested at E83 consistently.

My fuel mix usually puts me at about E35-E36 (rather be safe than sorry). The whole issues with throttle closure is definitely a tuning issue on PTF side. I thought I was the only one with this problem but other forum members have said the same thing happens on the Stg 2 93 map as well. Not sure why PTF has the boost spike so high instead of it ramping up in a linear fashion. Another issue is that I am running straight piping from the turbo back (ER Catless DP + MPPSK Exhaust) which is definitely not helping the boost spike issue. I even get low burbles in comfort mode and slight pops. Again, from what i've read and talked with other forum members, its due to being straight pipped.

Regardless, I havent had any fuel pump cut issues until the weather dropped into the 50s. Even in the 60s it comes close but still holds. Anyway, I was supposed to get my oil changed Monday at the dealer, but had to postpone it until tomorrow. I've talked with my mechanic and we are going to install the CPI kit next weekend. Once it's installed, I'll get to work with F80Paul and then post a full review.

This might sound crazy, but would you be willing to try the stage 1 e30 tune and see if it's any different? I have a theory about the difference between the two, but I don't know anyone that's gone back and forth to compare how they behave.

My thoughts are Stage 1 + disable cat monitoring is the same as stage 2 and *could* fix your issue.

[Solid67]

Originally Posted by kern417

This might sound crazy, but would you be willing to try the stage 1 e30 tune and see if it's any different? I have a theory about the difference between the two, but I don't know anyone that's gone back and forth to compare how they behave.

My thoughts are Stage 1 + disable cat monitoring is the same as stage 2 and *could* fix your issue.

I am picking up my car from the dealership today. I reflashed back to stock and locked the DME only because they are doing the MPPSK service bulletin on my car. Otherwise, my SA told me there were no scheduled updates or recalls for my car so I could have left the car flashed. I'll give Stg 1 E30 a shot on the way home and take some logs.

[SystemOfUrdaW]

Guys could those misfires have anything to do with spark plugs or coils ignition???

[M140_BCS]

Had a first fuel cut today on pump 93.

Range was quite low - just under 50miles.

Drivetrain malfunction came on at WOT 6.5k rpm.

Cleared active codes and refuelled, all seems good now.

https://datazap.me/u/m140bcs/log-158...41-42-43-44-48

[InstigatorX]

Ambient temp below about 55F caused same issue for me. Now that temps are consistently above 60F, no issues with E34 with MHD E30 ST1.

[MeByName]

Originally Posted by M140_BCS

Had a first fuel cut today on pump 93.

Range was quite low - just under 50miles.

Drivetrain malfunction came on at WOT 6.5k rpm.

Cleared active codes and refuelled, all seems good now.

https://datazap.me/u/m140bcs/log-158...41-42-43-44-48

Having the same on 98ron. Tested spark plugs, new injectors. All seems fine, but getting the same behaviour on tu fuel pump. Have you moved any further?

[M140_BCS]

Originally Posted by MeByName

Having the same on 98ron. Tested spark plugs, new injectors. All seems fine, but getting the same behaviour on tu fuel pump. Have you moved any further?

Only had the problem a few times when at WOT and low on fuel (under 10 litres)

[MeByName]

Originally Posted by M140_BCS

Only had the problem a few times when at WOT and low on fuel (under 10 litres)

3/4 of tank.
Will check tank ventilation system.