Why does the fuel pump not do well with ethanol? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kochinopride · 05-22-2013, 02:16 PM

I've been running e85 for about 8,000 miles and nothing. I get clutch chatter

boredom.is.me · 05-23-2013, 05:45 AM

I couldn't find my own thread.

Good stuff guys. I'm just here learning.

StormTrooper · 05-23-2013, 12:33 PM

I'm pretty sure none of the cars I've driven have this. At 3k miles I can and feel the rear diff and hear the injectors....

tripjammer · 05-23-2013, 12:39 PM

I also have no chirp yet...close in on 5500 miles...

Pure Automotive · 05-23-2013, 12:49 PM

The first turbo car we did runs e85 and has no chirps either

fistpoint · 05-23-2013, 10:41 PM

I thought the latest theory on the crickets was an improperly installed valve inside the pump itself during manufacture?

SportInjected · 05-23-2013, 11:25 PM

I run e85 daily and unless I got used to them, the crickets haven't gotten any louder at all since I switched over from 93.

midnightfrolic · 05-24-2013, 12:59 AM

I've had squeaks with every gasoline I've used. I've tried different branches of the same company in different cities. The Crickets are relentless. Maybe I need to drive it till near empty and fill up?

Fuel companies I've used:
76
Shell
Costco
Arco AM/PM
Chevron

swpbrz · 03-16-2014, 08:08 PM

Quote:

Originally Posted by mad_sb

I believe toyota at one time thought it was related to ethanol content but from the reports we have on the forum, ethanol content makes zero difference as there are some folks on E Free fuels exclusively that have chirps all the way to people on E85 that have seen no change from E10.

Not to mention the change in lubricating properties from E0 to E10 are minimal at best.....

It for sure has to do with the ethanol. The day I bought my car it was fine. The very first fill up with 10 % ethanol was immediate chirps. It really isn't even a question. At least one cause for the chirping is this. I left the state and as soon as I fill up with a non ethanol blend it goes away. Again for sure atleast one thing for sure 100 % is the ethanol. It sucks your on here diluting a possible solution because you dont have identical symptoms

swpbrz · 03-16-2014, 08:11 PM

Quote:

Originally Posted by midnightfrolic

I've had squeaks with every gasoline I've used. I've tried different branches of the same company in different cities. The Crickets are relentless. Maybe I need to drive it till near empty and fill up?

Fuel companies I've used:
76
Shell
Costco
Arco AM/PM
Chevron

You're out of luck without leaving the state. CA allows or mandates an ethanol blend. We are screwed unless they make a piece that can handle the ethanol.

mad_sb · 03-16-2014, 08:58 PM

Quote:

Originally Posted by swpbrz

It for sure has to do with the ethanol. The day I bought my car it was fine. The very first fill up with 10 % ethanol was immediate chirps. It really isn't even a question. At least one cause for the chirping is this. I left the state and as soon as I fill up with a non ethanol blend it goes away. Again for sure atleast one thing for sure 100 % is the ethanol. It sucks your on here diluting a possible solution because you dont have identical symptoms

How do you know it had ethanol free gas in it when you purchased it?

The Ethanol issue has be suspected since day 1, and some people seem to have success in running different brands of gas but I believe it was dis-proven to be the root issue in all cases (meaning it does not eliminate the crickets in all cases), looking for the detailed thread where the pump was torn down now. And if I am providing this one little bit of "bad" information it is more than made for by the many threads i have posted about tuning tech etc.

Edit:
Found the Subaru tsb that explains it is to do with the clearances on the pump internals, looks like this latest revision says that fuel formulation may contribute so if running E0 works for you that's great, but i believe the root cause is still the pump design or rather the way tolerances stack up on some pumps in comparison to others. That does not mean it works in all cases, nor that it will always work in yours.

boredom.is.me · 03-16-2014, 09:45 PM

Well they must have fixed it. I replaced my pump around Christmas and haven't chirped yet.

quasi86 · 03-17-2014, 12:35 AM

With me they've been gone since the weather turned cold here in St Louis. However on the couple of days recently that it has gotten warmer I can definitely hear them again.

We have 93 around here and it is 10% ethanol. I almost exclusively use Quiktrip to refill.

Temperature has effected/eliminated the crickets for the time being, but I fear they will return.

Sent from my EVO using Tapatalk

mike the snake · 03-17-2014, 01:22 AM

I posted this in the "crickets" thread a while back. On my old BMW they had probs with the DI fuel pump, and someone suggested running a capfull of synthetic 2-stroke oil per tankfull of gas, and that was supposed to help.

I haven't had the crickets, but I bet this trick would work. It certainly wouldn't hurt anything to try.

05-22-2013, 02:16 PM	#15
Kochinopride Senior Member Join Date: Aug 2012 Drives: 13 FR-S, 12 CLS AMG, 05 Lotus Elise Location: Edgewater, NJ Posts: 532 Thanks: 103 Thanked 143 Times in 103 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	I've been running e85 for about 8,000 miles and nothing. I get clutch chatter __________________ 2005 Lotus Elise 2012 Mercedes Benz CLS AMG 6.3 2013 Scion FR-S 2011 Land Rover LR4 2013 Lamborghini Gallardo LP570-4 Superleggera

03-17-2014, 12:35 AM	#27
quasi86 Senior Member Join Date: Feb 2013 Drives: 2013 Scion FR-S m/t Raven Location: St Peters, MO Posts: 142 Thanks: 71 Thanked 55 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	With me they've been gone since the weather turned cold here in St Louis. However on the couple of days recently that it has gotten warmer I can definitely hear them again. We have 93 around here and it is 10% ethanol. I almost exclusively use Quiktrip to refill. Temperature has effected/eliminated the crickets for the time being, but I fear they will return. Sent from my EVO using Tapatalk __________________ Everyone, Including The Office Girls And Ladies, Came To See This Come Off The Truck For The Very First Time!

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05-23-2013, 12:49 PM	#19
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05-23-2013, 10:41 PM	#20
fistpoint Senior Member Join Date: Dec 2011 Drives: Supercharged Golf Cart Location: Estados Unitos Posts: 1,196 Thanks: 75 Thanked 364 Times in 206 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I thought the latest theory on the crickets was an improperly installed valve inside the pump itself during manufacture?

05-24-2013, 12:59 AM	#22
midnightfrolic Senior Member Join Date: Oct 2012 Drives: Scion FRS A/T raven Location: California Posts: 242 Thanks: 136 Thanked 51 Times in 33 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I've had squeaks with every gasoline I've used. I've tried different branches of the same company in different cities. The Crickets are relentless. Maybe I need to drive it till near empty and fill up? Fuel companies I've used: 76 Shell Costco Arco AM/PM Chevron

03-17-2014, 01:22 AM	#28
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I posted this in the "crickets" thread a while back. On my old BMW they had probs with the DI fuel pump, and someone suggested running a capfull of synthetic 2-stroke oil per tankfull of gas, and that was supposed to help. I haven't had the crickets, but I bet this trick would work. It certainly wouldn't hurt anything to try.

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