Cold weather knocking during start ups. - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

whtchocla7e · 02-18-2013, 08:03 AM

Today I went to start the car after more than 24h. It was 15*F outside.
I got like five or so good (loud) knocks in the first few seconds.

I was expecting this so I set up two cams for recording. The bulit-in mics blow but maybe I'll be able to salvage something.

Not happy..

getbent · 02-19-2013, 03:33 PM

I wonder if the anti-drainback valve in the oil filter isn't functioning properly and the oil is draining out of the filter.

Hanakuso · 02-19-2013, 04:29 PM

I've noticed a "knock" a few times while warming the engine up. It sounds more like something is loose and slightly rattling.

Btw weather is 40-60F

Wattage · 02-22-2013, 08:31 AM

I think this happened to me today. Went to start my car in the morning, first try it would not start, second try it started after about 5 or more seconds with the same kind of knocking you guys are describing. It went away after about a minute and the drive to work seemed normal, although i kept the revs as low as possible. The temp was zero celcius. Ive never had this issue before today, even when it was minus 20 C.

Kinda concerned, really thinking of going to the dealership about this.

shu5892001 · 02-22-2013, 10:02 AM

My car does this every cold morning, coughs a few times during the first 10 seconds

Tt3Sheppard · 02-22-2013, 11:22 AM

I've run into this issue in the past few weeks. I went to start my car after work and it started but then sounded like it was going to stall and then was ok. This past weekend I started the car and it hesitated like it wasn't fully on.

whtchocla7e · 02-23-2013, 10:21 AM

Dropped my car off at the dealer and got a rental. I recorded the knocking and gave them a video. Interested in what they find.

A5D5TRYR · 02-23-2013, 10:28 AM

I'm interested to hear what they have to say. Seems a number of people are running into this to some degree or another.

Wattage · 02-23-2013, 02:52 PM

I'm curious, how much fuel did you guys have left in your tanks when you encountered this?

After asking around a bit, people have told me this can happen in cold temps with low fuel levels due to condensation. My Dad said it happens occasionally in low temps with his BMW M coupe when it is low on fuel.

When it happened to me, I had a quarter tank of fuel at 0 Celcius.

Nevermore · 02-23-2013, 04:20 PM

I wouldn't call it a knock, but my dad said it's got a miss on start up. Not sure if it's only the cold starts though since I've only had it since it's been cold. It misses for the first few minutes of idle. Not sure if this similar.

A5D5TRYR · 02-24-2013, 10:12 AM

Quote:

Originally Posted by Nevermore

I wouldn't call it a knock, but my dad said it's got a miss on start up. Not sure if it's only the cold starts though since I've only had it since it's been cold. It misses for the first few minutes of idle. Not sure if this similar.

Yeah that sounds EXACTLY like what mine does. But if I just start driving it's fine. Even if I only drive for 30 seconds or so and come to a stop again it's gone.

A5D5TRYR · 02-24-2013, 10:13 AM

Quote:

Originally Posted by Wattage

I'm curious, how much fuel did you guys have left in your tanks when you encountered this?

After asking around a bit, people have told me this can happen in cold temps with low fuel levels due to condensation. My Dad said it happens occasionally in low temps with his BMW M coupe when it is low on fuel.

When it happened to me, I had a quarter tank of fuel at 0 Celcius.

Happens at every fuel level for me. And it seemed a little bit worse on Shell 91 than it did with Ultra 94, but that could be me.

Laika · 02-24-2013, 11:43 AM

I get one bad hiccup on start up and that's pretty much it. Not completely positive if it's knock but I can't suggest anything else it could be.

I was so sure it was due to my tune until I flashed to stock and still had the same issue. I'll try to take a video and see if other people can agree they have a similar issue.

Opposed · 02-24-2013, 01:13 PM

Mine has been doing this all winter when its below maybe 10 degrees. Mostly sounds like its oil starved (valve tick, piston slap, ect)

02-18-2013, 08:03 AM	#15
whtchocla7e Senior Member Join Date: May 2012 Drives: 2013 FR-S Hot Lava Location: CT Posts: 424 Thanks: 30 Thanked 222 Times in 81 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Today I went to start the car after more than 24h. It was 15*F outside. I got like five or so good (loud) knocks in the first few seconds. I was expecting this so I set up two cams for recording. The bulit-in mics blow but maybe I'll be able to salvage something. Not happy.. __________________ Live to drive another day

02-19-2013, 03:33 PM	#16
getbent Senior Member Join Date: May 2012 Drives: 2013 FR-S Blue MT Location: Raleigh, NC Posts: 162 Thanks: 4 Thanked 37 Times in 26 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I wonder if the anti-drainback valve in the oil filter isn't functioning properly and the oil is draining out of the filter. __________________ 2013 Scion FR-S \| 6MT \| UltraMarine

02-23-2013, 10:21 AM	#21
whtchocla7e Senior Member Join Date: May 2012 Drives: 2013 FR-S Hot Lava Location: CT Posts: 424 Thanks: 30 Thanked 222 Times in 81 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Dropped my car off at the dealer and got a rental. I recorded the knocking and gave them a video. Interested in what they find. __________________ Live to drive another day

02-23-2013, 10:28 AM	#22
A5D5TRYR Senior Member Join Date: Nov 2012 Drives: FR-S 6MT Ultramarine (BeeDrill) Location: London, Canada Posts: 238 Thanks: 104 Thanked 56 Times in 38 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I'm interested to hear what they have to say. Seems a number of people are running into this to some degree or another. __________________ 2013 Scion FR-S - Ultramarine 6MT

02-23-2013, 04:20 PM	#24
Nevermore Wayward Member Join Date: May 2012 Drives: Hot Lava 86 Location: Bust of Pallas Posts: 3,336 Thanks: 1,669 Thanked 2,312 Times in 1,386 Posts Mentioned: 50 Post(s) Tagged: 3 Thread(s)	I wouldn't call it a knock, but my dad said it's got a miss on start up. Not sure if it's only the cold starts though since I've only had it since it's been cold. It misses for the first few minutes of idle. Not sure if this similar. __________________

02-19-2013, 04:29 PM	#17
Hanakuso Senior Member Join Date: Apr 2012 Drives: FR-S Location: California Posts: 1,956 Thanks: 294 Thanked 673 Times in 390 Posts Mentioned: 11 Post(s) Tagged: 2 Thread(s)	I've noticed a "knock" a few times while warming the engine up. It sounds more like something is loose and slightly rattling. Btw weather is 40-60F

02-22-2013, 08:31 AM	#18
Wattage Member Join Date: Nov 2012 Drives: scion fr-s MT Location: Toronto Posts: 96 Thanks: 61 Thanked 56 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I think this happened to me today. Went to start my car in the morning, first try it would not start, second try it started after about 5 or more seconds with the same kind of knocking you guys are describing. It went away after about a minute and the drive to work seemed normal, although i kept the revs as low as possible. The temp was zero celcius. Ive never had this issue before today, even when it was minus 20 C. Kinda concerned, really thinking of going to the dealership about this.

02-22-2013, 10:02 AM	#19
shu5892001 Ontario's FT86 Join Date: Aug 2012 Drives: 2016 Lexus GS-F Location: Toronto Posts: 685 Thanks: 261 Thanked 165 Times in 111 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	My car does this every cold morning, coughs a few times during the first 10 seconds

02-23-2013, 02:52 PM	#23
Wattage Member Join Date: Nov 2012 Drives: scion fr-s MT Location: Toronto Posts: 96 Thanks: 61 Thanked 56 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'm curious, how much fuel did you guys have left in your tanks when you encountered this? After asking around a bit, people have told me this can happen in cold temps with low fuel levels due to condensation. My Dad said it happens occasionally in low temps with his BMW M coupe when it is low on fuel. When it happened to me, I had a quarter tank of fuel at 0 Celcius.

02-24-2013, 11:43 AM	#27
Laika When In Doubt... Join Date: May 2011 Drives: Slowww Location: PA215 Posts: 1,844 Thanks: 1,023 Thanked 752 Times in 412 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	I get one bad hiccup on start up and that's pretty much it. Not completely positive if it's knock but I can't suggest anything else it could be. I was so sure it was due to my tune until I flashed to stock and still had the same issue. I'll try to take a video and see if other people can agree they have a similar issue. __________________ Join the Galaxy Blue Silica BRZ registry below: https://docs.google.com/spreadsheet/...2c&usp=sharing

02-24-2013, 01:13 PM	#28
Opposed Senior Member Join Date: Jun 2012 Drives: 2013 Asphalt FR-S Location: Bloomington, MN Posts: 1,156 Thanks: 499 Thanked 447 Times in 294 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Mine has been doing this all winter when its below maybe 10 degrees. Mostly sounds like its oil starved (valve tick, piston slap, ect) __________________ Asphalt FR-S: EcuTek Visconti STG2 tune, MAPerformance turbo kit, MAPerformance 3" exhaust, Hotchkis springs, Mach-V 17x9 Awesomes. Build thread: http://www.ft86club.com/forums/showthread.php?t=30703

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