Cold weather start - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

oppiee · 01-07-2015, 06:23 PM

Freezing today, took a good 5 seconds before the car started.
Then I hear some knocking. I have had that knocking since winter, but its worse in the cold. Anyone have the same issue?

Bergen23 · 01-07-2015, 06:27 PM

I once had a long start. However, I let the fuel injectors warm up before I start the car. Usually 15-20 seconds before I crank it. That could be the long start issue if you tried to just turn it over immediately.

As for the knocking, not a clue. Have you ever taken it to the dealer or a shop to get it diagnosed?

BRZZZZZZZZZZ · 01-07-2015, 07:16 PM

Quote:

Originally Posted by Bergen23

I let the fuel injectors warm up before I start the car.

Uhmmmm wat?

Do you mean let the fuel pump prime to build pressure?

Sweet48 · 01-07-2015, 07:28 PM

Knocking could be from the ultra cold oil and it not flowing into the motor fast enough. Not 100% on that one but someone feel free to say "shut up, you dont know what you're talking about".

Also priming the fuel pump prior to very cold starts is a good practice.

D_Thissen · 01-07-2015, 07:42 PM

It was freezing up here in Tbay (-30 before the wind last night). I plugged in the block heater for about an hour and a half this morning and she fired right up. 0W20 oil is amazing! I never had a problem in Whitby with the cold though.

Bergen23 · 01-07-2015, 07:59 PM

Quote:

Originally Posted by BRZZZZZZZZZZ

Uhmmmm wat?

Do you mean let the fuel pump prime to build pressure?

Oh dear, sorry I used an incorrect terminology. Maybe for someone who I presume has been an auto enthusiast for a while, you could be less of a ****head to someone new to the game and cut the condescension.

pushrod · 01-07-2015, 09:46 PM

Quote:

Originally Posted by oppiee

Freezing today, took a good 5 seconds before the car started.
Then I hear some knocking. I have had that knocking since winter, but its worse in the cold. Anyone have the same issue?

Don't worry about the "knocking". It's just small afterfires. Anyone that has heard an old rotary starting up will know exactly what I'm talking about.

The only thing I do in the winter is let the fuel pump run before turning the key, and then I let the engine run while I scrape all the snow and ice off of the car.

After that, I drive in first gear slowly all the way down my street. That helps circulate things in the transmission a bit. Without it, I can't get into second gear easily.

Two minutes later the car is as ready as it will ever be. HTH.

pushrod · 01-07-2015, 09:48 PM

Quote:

Originally Posted by Bergen23

Oh dear, sorry I used an incorrect terminology. Maybe for someone who I presume has been an auto enthusiast for a while, you could be less of a ****head to someone new to the game and cut the condescension.

Welcome to the internet.

Bergen23 · 01-07-2015, 10:03 PM

Quote:

Originally Posted by pushrod

Welcome to the internet.

I always forget that people aren't exactly patient, or polite. I blame my motorcycle, as it has a red light with FI underneath it while the fuel pump is priming and that's what I thought of when I typed the post.

wparsons · 01-08-2015, 06:57 AM

Forget about cold starts, you *should* always let the pump fully prime before cranking the engine over. You can hear it if you listen, but if you wait for the fuel gauge to move to however much gas you have left that's typically long enough.

As for the cold starts, I definitely get some after fires or mis fires when it's really cold, they go away once there's a bit of heat in the engine (like 30 seconds of idling).

It was cold enough last night that with the clutch out in neutral the idle actually dropped a couple hundred RPM from the drag of the gearbox fluid, and even made the car lurch forward a couple inches.

BRZZZZZZZZZZ · 01-08-2015, 08:53 AM

Quote:

Originally Posted by Bergen23

Oh dear, sorry I used an incorrect terminology. Maybe for someone who I presume has been an auto enthusiast for a while, you could be less of a ****head to someone new to the game and cut the condescension.

I suggest you leave the forum now if you think that was rude, because your gonna be butthurt about a lot more things around here.

FLYFISHR · 01-08-2015, 11:13 AM

[QUOTE=wparsons;208215
It was cold enough last night that with the clutch out in neutral the idle actually dropped a couple hundred RPM from the drag of the gearbox fluid, and even made the car lurch forward a couple inches.[/QUOTE]

I find mine does the same any time it's been sitting in the real cold weather.

FRSBRZGT86FAN · 01-08-2015, 11:22 AM

Don't boxer engines get piston slap when really cold?

daiheadjai · 01-08-2015, 12:00 PM

Good to know - I have not been priming my fuel pump before starting.
It hasn't been an issue since I park in underground garages most of the time, but this is certainly going to be useful...

01-07-2015, 06:23 PM	#1
oppiee Senior Member Join Date: Feb 2014 Drives: 2014 Scion FRS (Red) Location: Toronto Posts: 148 Thanks: 15 Thanked 15 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Cold weather start Freezing today, took a good 5 seconds before the car started. Then I hear some knocking. I have had that knocking since winter, but its worse in the cold. Anyone have the same issue?

01-07-2015, 07:42 PM	#5
D_Thissen Senior Member Join Date: Jan 2014 Drives: '13 Argento FR-S (Sold) Location: Ontario Posts: 2,126 Thanks: 3,209 Thanked 1,439 Times in 855 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	It was freezing up here in Tbay (-30 before the wind last night). I plugged in the block heater for about an hour and a half this morning and she fired right up. 0W20 oil is amazing! I never had a problem in Whitby with the cold though. __________________ My FR-S Build IG: dthissen

01-08-2015, 11:13 AM	#12
FLYFISHR Senior Member Join Date: Aug 2013 Drives: 2014 BR"ZED" Sport-tech DGM MT Location: GTA CANADA Posts: 722 Thanks: 464 Thanked 253 Times in 162 Posts Mentioned: 7 Post(s) Tagged: 3 Thread(s)	[QUOTE=wparsons;208215 It was cold enough last night that with the clutch out in neutral the idle actually dropped a couple hundred RPM from the drag of the gearbox fluid, and even made the car lurch forward a couple inches.[/QUOTE] I find mine does the same any time it's been sitting in the real cold weather. __________________ Old enough to know better but young enough to do it again

01-08-2015, 11:22 AM	#13
FRSBRZGT86FAN Senior Member Join Date: Jun 2013 Drives: 2023 GR SUPRA,15 FR-S (SOLD) Location: Philadelphia, PA Posts: 4,235 Thanks: 3,086 Thanked 2,100 Times in 1,397 Posts Mentioned: 31 Post(s) Tagged: 2 Thread(s)	Don't boxer engines get piston slap when really cold? __________________ SOLDOFT Stage 2 UEL E85/Nameless Performance 3 inch axleback with 5 inch mufflers/ TRD CAI / CNT UEL/ Cusco Strut BAR & LHD Brake Stop / "JDM" Toyota Badges / WinJet JDM headlights - DRL MOD from fteightysix.com - 5000K Diode Dynamics HID kit / Diode Dynamics LED interior Lights and sidemarker bulbs / JDM Clear Sidemarkers / Diode Dynamics LED switchbacks/ OLM LED rear turn signals / Tap Turn RelaySOLD

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01-07-2015, 06:27 PM	#2
Bergen23 Banned Join Date: Dec 2014 Drives: '15 Halo FR-S Location: Ontario, Canada Posts: 1,317 Thanks: 922 Thanked 950 Times in 492 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	I once had a long start. However, I let the fuel injectors warm up before I start the car. Usually 15-20 seconds before I crank it. That could be the long start issue if you tried to just turn it over immediately. As for the knocking, not a clue. Have you ever taken it to the dealer or a shop to get it diagnosed?

01-07-2015, 07:28 PM	#4
Sweet48 Member Join Date: Dec 2013 Drives: 2013 Subaru BRZ Location: Toronto Posts: 84 Thanks: 9 Thanked 44 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Knocking could be from the ultra cold oil and it not flowing into the motor fast enough. Not 100% on that one but someone feel free to say "shut up, you dont know what you're talking about". Also priming the fuel pump prior to very cold starts is a good practice.

01-08-2015, 12:00 PM	#14
daiheadjai Senior Member Join Date: Feb 2012 Drives: 2003 S2000, 2008 Fit Location: Toronto, ON, Canada Posts: 1,990 Thanks: 2,584 Thanked 1,154 Times in 688 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Good to know - I have not been priming my fuel pump before starting. It hasn't been an issue since I park in underground garages most of the time, but this is certainly going to be useful...

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