Nasty Enginer Noise - Help needed - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

elchote · 01-17-2016, 05:15 PM

Hello guys, have this nasty engine noise that I need help diagnosing. Hope it's not the awfulness I'm imagining. Happened on a fresh tank of E85, at about 6500 rpm on second gear.

Mod list:
Borla UEL headers
Nameless hi flow cat uppipe
Isis catback
K&N drop in filter
Moto east E85 tune

swarb · 01-17-2016, 05:29 PM

Seriously don't leave it on.
Any smoke when it happened?
Do you have a flex fuel kit?
How reliable is your fuel?
Did you put the wrong fuel in? Are you 100% sure?
Do you have any thing to read from the ecu? fuel trims etc?
Did you immediately make a pass after fueling?
Check your oil.
If you think it is the fuel, drain it from the tank and refill and hope the damage hasn't already been done.

elchote · 01-17-2016, 05:47 PM

Didn't see any smoke. No flex fuel kit. Filled up with e85 with gas gauge reading empty and drove about 30 miles before I got on it. Not sure what the mix exactly was when it happened but it was definitely ethanol i put in because of the smell. Will check oil, and hook up ecutek cable to see if i can grab anything

elchote · 01-17-2016, 05:55 PM

Could it be a manifold leak? Header has been rattling for the past couple days

Apoc · 01-17-2016, 05:57 PM

Sounds like a hole in your exhaust.

Ultramaroon · 01-17-2016, 06:06 PM

cracked flexible coupling on the Borla? Sounds like you filmed a cold start. Smell exhaust in the engine bay?

elchote · 01-17-2016, 06:36 PM

Yeah, it was a cold start, that's why you hear the noise go away when the idle dips. Was trying to smell for the exhaust but didn't smell it as too obvious, possible it was there though. When I first installed my Borla, I had a nasty rattle/resonance from the flexible couplings. I covered them up with exhaust wrap which helped a lot with the rattle. It could be that they finally cracked.

Aztec · 01-17-2016, 06:42 PM

+1 for exhaust leak. Jack that thing up and take off the header

swarb · 01-17-2016, 06:54 PM

Quote:

Originally Posted by elchote

Could it be a manifold leak? Header has been rattling for the past couple days

Ultramaroon · 01-17-2016, 07:16 PM

Quote:

Originally Posted by swarb

be nice

humfrz · 01-17-2016, 08:56 PM

Quote:

Originally Posted by elchote

Could it be a manifold leak? Header has been rattling for the past couple days

............

humfrz

FRSBRZGT86FAN · 01-17-2016, 10:07 PM

Quote:

Originally Posted by swarb

Seriously don't leave it on.
Any smoke when it happened?
Do you have a flex fuel kit?
How reliable is your fuel?
Did you put the wrong fuel in? Are you 100% sure?
Do you have any thing to read from the ecu? fuel trims etc?
Did you immediately make a pass after fueling?
Check your oil.
If you think it is the fuel, drain it from the tank and refill and hope the damage hasn't already been done.

Quote:

Originally Posted by elchote

Hello guys, have this nasty engine noise that I need help diagnosing. Hope it's not the awfulness I'm imagining. Happened on a fresh tank of E85, at about 6500 rpm on second gear.

Mod list:
Borla UEL headers
Nameless hi flow cat uppipe
Isis catback
K&N drop in filter
Moto east E85 tune

Quote:

Originally Posted by elchote

Could it be a manifold leak? Header has been rattling for the past couple days

Quote:

Originally Posted by Apoc

Sounds like a hole in your exhaust.

Quote:

Originally Posted by elchote

Yeah, it was a cold start, that's why you hear the noise go away when the idle dips. Was trying to smell for the exhaust but didn't smell it as too obvious, possible it was there though. When I first installed my Borla, I had a nasty rattle/resonance from the flexible couplings. I covered them up with exhaust wrap which helped a lot with the rattle. It could be that they finally cracked.

Sounds alot like a manifold exhaust leak to me as well, as you increase revs the sound becomes faster and more prominent?

pantdino · 01-17-2016, 11:06 PM

Almost certainly an exhaust leak-- so about the cheapest of the possible problems to fix.

elchote · 01-18-2016, 09:50 AM

Thanks guys, I have to go out of town this week but I will put it up on the jack and check this Friday.

01-17-2016, 05:15 PM	#1
elchote Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Alabama Posts: 16 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Nasty Enginer Noise - Help needed Hello guys, have this nasty engine noise that I need help diagnosing. Hope it's not the awfulness I'm imagining. Happened on a fresh tank of E85, at about 6500 rpm on second gear. Mod list: Borla UEL headers Nameless hi flow cat uppipe Isis catback K&N drop in filter Moto east E85 tune

01-17-2016, 05:57 PM	#5
Apoc Senior Member Join Date: Jul 2012 Drives: Raven FR-S 6M Location: Calgary, Canada Posts: 638 Thanks: 348 Thanked 375 Times in 232 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	Sounds like a hole in your exhaust. __________________ “The World is Flat” [\|\|•]=(86)=[•\|\|]

01-17-2016, 06:06 PM	#6
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,878 Thanks: 52,148 Thanked 36,528 Times in 18,928 Posts Mentioned: 1108 Post(s) Tagged: 9 Thread(s)	cracked flexible coupling on the Borla? Sounds like you filmed a cold start. Smell exhaust in the engine bay? __________________ service manuals

01-17-2016, 06:42 PM	#8
Aztec Lost in the twisties Join Date: Sep 2014 Drives: 2014 BRZ Dark Gray Metallic Location: Beaverton, OR Posts: 661 Thanks: 436 Thanked 297 Times in 187 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	+1 for exhaust leak. Jack that thing up and take off the header __________________ NEW CAR!🚨🏎️⛽ 2014 BRZ: Edelbrock SC, CSG ZachTune, Jackson Radiator/Oil cooler, lightweight flywheel, CNT UEL, Berk OP/FP, Ark Grip Catback, Carbon fiber Driveshaft Aztec's Build Thread

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01-17-2016, 05:29 PM	#2
swarb Senior Member Join Date: Sep 2014 Drives: BRZ Location: Los Angeles Posts: 3,053 Thanks: 1,773 Thanked 2,451 Times in 1,271 Posts Mentioned: 79 Post(s) Tagged: 0 Thread(s)	Seriously don't leave it on. Any smoke when it happened? Do you have a flex fuel kit? How reliable is your fuel? Did you put the wrong fuel in? Are you 100% sure? Do you have any thing to read from the ecu? fuel trims etc? Did you immediately make a pass after fueling? Check your oil. If you think it is the fuel, drain it from the tank and refill and hope the damage hasn't already been done.

01-17-2016, 05:47 PM	#3
elchote Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Alabama Posts: 16 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Didn't see any smoke. No flex fuel kit. Filled up with e85 with gas gauge reading empty and drove about 30 miles before I got on it. Not sure what the mix exactly was when it happened but it was definitely ethanol i put in because of the smell. Will check oil, and hook up ecutek cable to see if i can grab anything

01-17-2016, 05:55 PM	#4
elchote Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Alabama Posts: 16 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Could it be a manifold leak? Header has been rattling for the past couple days

01-17-2016, 06:36 PM	#7
elchote Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Alabama Posts: 16 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yeah, it was a cold start, that's why you hear the noise go away when the idle dips. Was trying to smell for the exhaust but didn't smell it as too obvious, possible it was there though. When I first installed my Borla, I had a nasty rattle/resonance from the flexible couplings. I covered them up with exhaust wrap which helped a lot with the rattle. It could be that they finally cracked.

01-18-2016, 09:50 AM	#14
elchote Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Alabama Posts: 16 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks guys, I have to go out of town this week but I will put it up on the jack and check this Friday.

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