HPFP@ 99.99%

[ANMS4]

Hey guys anyone know wth my IE HPFP would be at 99.99% at like 6k :O

https://datazap.me/u/anmvq/log-16170...20-24-25-26-27

[Rodizzle]

Iv been seen this a lot lately . I mean a lot like 2-3 different DMs off Facebook . Both on IE and 034 .
Your LPFP flow is fine and so with others that Iv seen . I’m staying to think it’s a tuning issue on one of the latest updates . I could be wrong

-Ro


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[ANMS4]

Iv been seen this a lot lately . I mean a lot like 2-3 different DMs off Facebook . Both on IE and 034 .
Your LPFP flow is fine and so with others that Iv seen . I’m staying to think it’s a tuning issue on one of the latest updates . I could be wrong

-Ro


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Hey thanx man, Just wonder if that's why I saw a lean code on Saturday and then yesterday I hit what seemed to be fuel cut( Very Violent) when passing someone :/

[poppachulo]

Hey thanx man, Just wonder if that's why I saw a lean code on Saturday and then yesterday I hit what seemed to be fuel cut( Very Violent) when passing someone :/

I'm DP/e40 exclusively for the last 2 years and recently have been experiencing a violent power cut on WOT as well as hard starts/failed starts only when the car is hot.

Have you experienced any hard starting issues? How long have you been running ethanol with the IE HPFP?

Because of the problems I've experienced, I swapped out my autotech piston into another HPFP and have a new LPFP on the way. When I removed the autotech piston from the HPFP, it was clear that the piston travel was getting hung up due to a sticky buildup between the piston/cylinder in the HPFP. I cleaned the piston/cylinder well and resinstalled in the new HPFP, but haven't recently had a chance to mash on the car (awaiting new motor mounts which failed from all the violent bucking over the last few months). However, it seems that at least my hard start issues have gone away.

My thought is that the ethanol gunk stickiness prevents or slows the HPFP piston from returning to its completely extended position before the cam hits it again. This could explain why the HPFP duty cycle is so high at times - because we're getting an incomplete stroke of the HPFP. Maybe regular cleaning of the HPFP would help or a stiffer HPFP spring would overcome some of the inevitable ethanol gunk stickiness.

The strange thing about this is that I have no codes at all...

[ANMS4]

I'm DP/e40 exclusively for the last 2 years and recently have been experiencing a violent power cut on WOT as well as hard starts/failed starts only when the car is hot.

Have you experienced any hard starting issues? How long have you been running ethanol with the IE HPFP?

Because of the problems I've experienced, I swapped out my autotech piston into another HPFP and have a new LPFP on the way. When I removed the autotech piston from the HPFP, it was clear that the piston travel was getting hung up due to a sticky buildup between the piston/cylinder in the HPFP. I cleaned the piston/cylinder well and resinstalled in the new HPFP, but haven't recently had a chance to mash on the car (awaiting new motor mounts which failed from all the violent bucking over the last few months). However, it seems that at least my hard start issues have gone away.

My thought is that the ethanol gunk stickiness prevents or slows the HPFP piston from returning to its completely extended position before the cam hits it again. This could explain why the HPFP duty cycle is so high at times - because we're getting an incomplete stroke of the HPFP. Maybe regular cleaning of the HPFP would help or a stiffer HPFP spring would overcome some of the inevitable ethanol gunk stickiness.

The strange thing about this is that I have no codes at all...

I’ve been running the IE pump for a little over a year, E40 about 8 months.
Hard staring yes but I’m in the winter when it very cold. Never a failed start, and this is the second time I’ve had the lean code in the last 6 months, and first time the car hit fuel cut. My blend runs between E40 and E45. I had asked a while back about running a cleaner every other month or so and people said no need? Makes me wonder now, might try some today.

[BrokeBichB8]

Hey thanx man, Just wonder if that's why I saw a lean code on Saturday and then yesterday I hit what seemed to be fuel cut( Very Violent) when passing someone :/

What kind of lean code? I recently got a idle lean code on one bank as well and thought it may be from my generous E25 mix but I figured ecu had enough leeway to compensate.

How much ethanol did you run? Ever tried some fuel system cleaner?

[ANMS4]

I put some cleaner in yesterday, I run between E40-E45. Code I got was P0171. Which is scaring me because that was the same code I was seeing before my motor went south :/

[djn876]

I put some cleaner in yesterday, I run between E40-E45. Code I got was P0171. Which is scaring me because that was the same code I was seeing before my motor went south :/

I don't see your LTFTs logged here, your STFT is OK, but without the LTFT its hard to tell how far out it really is. Your lambda is lean though and you should be cautious until you get this resolved. Your target is 0.85 and in a lot of that run you are running closer to 0.9, which is a fairly significant difference. For ethanol cleaners to work well, you need to give them time. Put some in the tank, run it, let it sit, run it, let it sit, etc. If you just pour it in and run the whole tank it is less effective.

Personally I would just get a new HPFP and swap the piston over. Either that or you are having an injector problem, rail pressure overall looks OK, but it shouldn't be operating that high. Max should really be in the low 80s and then tapering off from there.

[djn876]

What kind of lean code? I recently got a idle lean code on one bank as well and thought it may be from my generous E25 mix but I figured ecu had enough leeway to compensate.

How much ethanol did you run? Ever tried some fuel system cleaner?

If you are running e25 on the stock HPFP or on a 93 tune, that is why you got a lean code. Your fuel trims are all super high and the ECU is out of room to compensate. If you aren't logging lambda frequently on that blend, just know you may actually be leaning out, especially if the weather gets cold. I'd recommend backing off a little on the ethanol if that's the case so the ECU can still compensate for any changes or issues.

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[BrokeBichB8]

If you are running e25 on the stock HPFP or on a 93 tune, that is why you got a lean code. Your fuel trims are all super high and the ECU is out of room to compensate. If you aren't logging lambda frequently on that blend, just know you may actually be leaning out, especially if the weather gets cold. I'd recommend backing off a little on the ethanol if that's the case so the ECU can still compensate for any changes or issues.

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Initially your statement is exactly what I thought, but at WOT runs my HPFP is keeping up and barely reaching max duty cycle at max rpm. Max value for pump_vol_vcv is 96. I get a P1136 at idle in the driveway which I thought could be amended by fuel trims even with a decent amount of ethanol no?

[djn876]

The HPFP isn't controlled via the tune, it will control duty cycle to meet the demanded rail pressure, so indirectly I guess. More likely it is failing and struggling to maintain pressure. That or your ethanol content is way too high, but that would impact the low side eventually too. Ethanol is really hard on components so it just could be a seal or the internal relief failing penis clogged.

Could try running some cleaner through it, I doubt any residue is enough to create sufficient drag on the pump, some of the passages are very small though, so they could get blocked.

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[djn876]

You should be running something to clean things up every now and then. Hard starts when cold are because high ethanol content fuels are harder to vaporize so it results in the harder starting you are experiencing. This could be fixed in the tune.

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[TD1 Motorsports]

You should be running something to clean things up every now and then. Hard starts when cold are because high ethanol content fuels are harder to vaporize so it results in the harder starting you are experiencing. This could be fixed in the tune.

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Anything beyond bumping rail pressure during start?

[jcutia]

So i bought a new pump assembly and 034 piston.. still hitting 99.99% hpfp duty.

Most recent log. Ie dp throttle 2+ with ported charger on e40.

[Shane Horning]

So i bought a new pump assembly and 034 piston.. still hitting 99.99% hpfp duty.

Most recent log. Ie dp throttle 2+ with ported charger on e40.

If you are close to sea level with ported charger no hpfp will keep up with e40. Throw 1000cc meth at it and call it a day

[RoofRails]

If you are close to sea level with ported charger no hpfp will keep up with e40. Throw 1000cc meth at it and call it a day

I think that's a accurate statement. The people who think they aren't having issues probably aren't logging and wouldn't know what's going on unless they get break up or a EPC during a run.

[RoofRails]

So i bought a new pump assembly and 034 piston.. still hitting 99.99% hpfp duty.

Most recent log. Ie dp throttle 2+ with ported charger on e40.

Do you have spacers on your secondary O2 sensors ? How about Meth injection ? If so what's your ratio ? That log looks strange to me , your HPFP was pegged at 99% but it was keeping up with the requested pressure. Your STFT was negative and your LTFT was positive and they were almost offsetting to a zero trim. Your Lamda did not look good , it was creeping up to a .9 and yet you still had room to go in the injector duration. The ECU opened up your BPV at 7300 to save your engine. Your LPFP is keeping up great. I'm so confused LOL !!!

I wouldn't keep beating on your car like this until you can get this figured out.

[ANMS4]

So just talked to IE they think the HPFP pump maybe bad, they want me to flash to 93 and log it, I’ll have an up date in a few days I got like 3/4 tank of E40 in there :/

[Shane Horning]

So just talked to IE they think the HPFP pump maybe bad, they want me to flash to 93 and log it, I’ll have an up date in a few days I got like 3/4 tank of E40 in there :/

I've had issues with hpfp gumming up when running e40 for awhile. I throw in a bottle of lucas deep clean once a month and no issues anymore

[ANMS4]

I've had issues with hpfp gumming up when running e40 for awhile. I throw in a bottle of lucas deep clean once a month and no issues anymore

Hey Shane! So you had the duty cycle that high? I’ll try this also, I just tossed in an once of the Star Tron Enzyme Fuel Treatment , I toss that in at my next fill up!

[Shane Horning]

Hey Shane! So you had the duty cycle that high? I’ll try this also, I just tossed in an once of the Star Tron Enzyme Fuel Treatment , I toss that in at my next fill up!

Yes I've struggled with 99% duty cycle multiple times. With both dirty hpfp and a weak hpfp

[ANMS4]

Would running spacers on the IE tune which is a TP tune cause the AF to be lean, or any other issues? I was reading 034 says do not run spacers on their TP tune?

[Rodizzle]

Would running spacers on the IE tune which is a TP tune cause the AF to be lean, or any other issues? I was reading 034 says do not run spacers on their TP tune?

No . Iv ran spacers since day one and it’s been 3 years with testpipes/spacers


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[ANMS4]

No . Iv ran spacers since day one and it’s been 3 years with testpipes/spacers


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Ok cool, thanx man. Flashing back to 93 tomorrow , and grabbing a log.

[ANMS4]

Hers a log of the 93 everything looks good ?
https://datazap.me/u/anmvq/2014-a6-3...20-21-22-26-27

[Rodizzle]

Hers a log of the 93 everything looks good ?
https://datazap.me/u/anmvq/2014-a6-3...20-21-22-26-27

More then good , wow 93 request got higher then last 93 file I saw .


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[ANMS4]

Thanx man!! But what’s my issue on E40 :(

[jcutia]

Im having this same issue on e40 ie dp throttle tune... autotech hpfp for over a year now..

[jcutia]

Waiting to install meth, but i hate how IE's response is "bad pump" odds of having a bad pump and piston only to buy a new pump and piston then seeing the same issue is pretty low imo, either that or i should buy the lottery.

[Loe]

I hit a similar roadblock with my Autotech unit a while back and found it was the LPFP bucket draining faster than it can replenish.

If your fuel rail pressures are dropping with a 99.99% cycle duty on the HPFP side, it's likely because it's trying to over compensation for a lack of fuel supplied by the LPFP.

I also found during my journey that this occurred more as the gas level in the tank drops.

The OE LPFP is more than capable of supplying up to e65 @ DP+TB+ported blower levels without dropping pressures as long as the LPFP bucket has sufficient fuel in it.

[jcutia]

I hit a similar roadblock with my Autotech unit a while back and found it was the LPFP bucket draining faster than it can replenish.

If your fuel rail pressures are dropping with a 99.99% cycle duty on the HPFP side, it's likely because it's trying to over compensation for a lack of fuel supplied by the LPFP.

I also found during my journey that this occurred more as the gas level in the tank drops.

The OE LPFP is more than capable of supplying up to e65 @ DP+TB+ported blower levels without dropping pressures as long as the LPFP bucket has sufficient fuel in it.

Can you modify the bucket, or will a new pump resolve the issue?

[BrokeBichB8]

I hit a similar roadblock with my Autotech unit a while back and found it was the LPFP bucket draining faster than it can replenish.

If your fuel rail pressures are dropping with a 99.99% cycle duty on the HPFP side, it's likely because it's trying to over compensation for a lack of fuel supplied by the LPFP.

I also found during my journey that this occurred more as the gas level in the tank drops.

The OE LPFP is more than capable of supplying up to e65 @ DP+TB+ported blower levels without dropping pressures as long as the LPFP bucket has sufficient fuel in it.

Loe, so what can you interpret if fuel rail pressures are dropping and but the HPFP is not maxed out? Basically once into boost my HPFP cannot keep up. But is there any way to determine if its actually the pump or a regulator issue from logs and driving method? When i do a pull on 91 octane tune my fuel pump exceeds requested by a decent amount throughout the pull so I don't think its a autotech pump issue? I have a brand new LPFP unit, which drastically improved low pressure (was misfiring at high rpm fuel cut before) but now my hpfp has issue throughout the pull. This is on a full tank of e40 btw so shouldnt be a bucket issue.


https://datazap.me/u/brokebichb8/new...45&zoom=22-133

[Loe]

Loe, so what can you interpret if fuel rail pressures are dropping and but the HPFP is not maxed out? Basically once into boost my HPFP cannot keep up. But is there any way to determine if its actually the pump or a regulator issue from logs and driving method? When i do a pull on 91 octane tune my fuel pump exceeds requested by a decent amount throughout the pull so I don't think its a autotech pump issue? I have a brand new LPFP unit, which drastically improved low pressure (was misfiring at high rpm fuel cut before) but now my hpfp has issue throughout the pull. This is on a full tank of e40 btw so shouldnt be a bucket issue.


https://datazap.me/u/brokebichb8/new...45&zoom=22-133

Is this an upgraded HPFP? Also can you add to the log the cycle duty of both the low pressure and high pressure sides? And which gear into the pull does it occur? and B8 or B8.5?

[BrokeBichB8]

Is this an upgraded HPFP? Also can you add to the log the cycle duty of both the low pressure and high pressure sides? And which gear into the pull does it occur? and B8 or B8.5?

Thanks for reply Loe! Yes this is an upgraded HPFP piston from Autotech. (uh-oh right?). I can definitely try to add those parameters but could you tell me what they would be under the logger? I thought on my log that "pump_vol_vcv" would be an effective indicator of duty cycle of HPFP and "efppwm" would be indicative of duty cycle of lpfp duty? I mean my first e40 logs were showing "efppwm" (lpfp duty?) maxing at about 4k rpm. After LPFP replacement it now maxes out at 6.5k rpm. Appreciate the guidance.

[Loe]

For the B8.5, no. But you can side-strap a 255lph to the outside of the bucket and feed the outlet into the bucket to always keep it full.

Keep in mind my symptoms were typically experienced on multi-gear runs giving time for the bucket to drain.

If you are experiencing this at the on-set of any degree of throttle input, then I'd point fingers at something else.

[Loe]

Which logging tool is it? They are labled differently between different tools.

Also any chance you can log just driving normally in town with varying degrees of throttle?, just a short 5 mins worth of logs. What immediately sticks out to me is your fuel pressures after you lift of the throttle, and stuck/static value's afterwards signalling to me its a potential harness issue and not hardware issue, but id like to see the normal driving logs if possible.

[Shane Horning]

Which logging tool is it? They are labled differently between different tools.

Also any chance you can log just driving normally in town with varying degrees of throttle?, just a short 5 mins worth of logs. What immediately sticks out to me is your fuel pressures after you lift of the throttle, and stuck/static value's afterwards signalling to me its a potential harness issue and not hardware issue, but id like to see the normal driving logs if possible.

Pretty sure its 034 logger. They have a good logger but their way of labeling sucks to the point I don't use it

[BrokeBichB8]

Pretty sure its 034 logger. They have a good logger but their way of labeling sucks to the point I don't use it

Correct. 034 logger. And I am looking to have an updated log at the end of this week. I actually just received a new hpfp so I will be swapping that out and then should be able to provide a log with some improvements hopefully.

[BrokeBichB8]

Have nearly new fuel system and am still having trouble. e40 ported charger 3.26 PR. W/ 034 upgraded hpfp. 034 has told me that they think there is something awry with the installation of my LPFP but I am not sure what it could be, I pulled it out and everything was fine. I noticed I have not heard the lpfp priming sound anymore, and I think it came after install of my 034 piston. Is there any way to say the lpfp issue could be acutally HPFP caused? thanks

Following log is with E40 and about 2 weeks before my crank pulley separated.
https://datazap.me/u/brokebichb8/log...g=1&data=15-45

Log at idle:
https://datazap.me/u/brokebichb8/log...?log=2&data=57

Log easy shifting:
https://datazap.me/u/brokebichb8/log...?log=1&data=45

[Rawbb]

I'm currently having this issue, but I'm not on ethanol.

034 tune, Stage 2+ - 93 R7.2 +High Rev 7600 +Advanced Launch

So 93 octane, I've got the 034 intake tube with aFE filter, modded stock air box, Merc racing s6 hx, 3.247 s/c pulley ratio - the EPL sc pulley and JHM 187 crank pulley.

Sent 034 a log last week and they followed up with this same thing. HPFP duty cycle is consistently around or over 90% for the majority of the pull, which is abnormal given the file/fuel that I am running. There was a also a brief spike where HPFP duty cycle was pinned at 99.99%.

Their suggestion is to replace the entire HPFP so I'm thinking of just going to the IE unit. This was just a single third gear pull so I don't think this is the same situation as Loe described with the LPFP bucket... Hoping replacing this actually does resolve the issue...