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Discussion Starter · #1 ·
Has any turbo cars have problems with cold weather. Suddenly my car has been running like crap. More importantly have any one found a cure. I just dyno tuned my car and don't want to touch my maps.

Derek happy 2004


Blocked off the intercooler and rehooked the heater hose through the throttle body. No miss fires. My thinking is too much dense air, way to cold. Gas probably could not atomize properly in sub zero temps. What are your thought's on this. Thanks kaine and other folks who helped.

Update
Doing it again, no codes. misfires at 4250 in any gear. in or out of boost. new plugs @ .30 any ideas guy's?
 

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Re: Cold Weather and F/I problems

maxxpsi said:
Has any turbo cars have problems with cold weather. Suddenly my car has been running like crap. More importantly have any one found a cure. I just dyno tuned my car and don't want to touch my maps.

Derek happy 2004
My cold starting has been getting worse in the cold weather. I tuned a little yesterday and richened up the cranking enrichments. Starts a bit better now.

But as far as running the car, it loves the cold weather even more.

Hook your water hose back up to the throttle body for a while, see if that helps. If your IC is cooling the air THAT much, then your TB could be freezing, causing erroneous problems.

It's worth a shot. I'm going to hook mine back up tomorrow, too cold out.


Kane
 

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Same here, starts fine (even though its not EXTREME cold...pretty nice today actually), but it loves the coool air!
 

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Discussion Starter · #5 ·
mine loved the cold weather until about 44 and below. The air temp going into my motor is about 18 degrees cooler than that with my intercooler and snow or rain on it. Mine starts great just hella rich at 3000 rpm then at 4200 it starts to back fire. You can see the raw fuel at night against other cars head lights. Oh my god when it back fires there are huge flames. Last night i must of shot a good 6ft bastard out my pipe.

Derek
 

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maxxpsi said:
mine loved the cold weather until about 44 and below. The air temp going into my motor is about 18 degrees cooler than that with my intercooler and snow or rain on it. Mine starts great just hella rich at 3000 rpm then at 4200 it starts to back fire. You can see the raw fuel at night against other cars head lights. Oh my god when it back fires there are huge flames. Last night i must of shot a good 6ft nastard out my pipe.

Derek
:eek:
 

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Since you are a custom kit, why don't you go back to the guy who installed it? This is the huge disadvantage of installing a custom kit. First if you actually can get by the ecu, then you are doing R&D on your own car. That can be a costly adventure.
 

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Discussion Starter · #9 ·
Wxman said:
Since you are a custom kit, why don't you go back to the guy who installed it? This is the huge disadvantage of installing a custom kit. First if you actually can get by the ecu, then you are doing R&D on your own car. That can be a costly adventure.
He is out of town unitl the 9th. When i turbo'd my car there was no kits avalible. PFS did not have one. Power house did not have one, TBKO was in development, area51 would not return calls on their sc. So I went to one of the biggest supra shops on the west coast. Have had no porblems at all untill be got really cold. Todays highs are a balmy 26. Hooking up the heater hoses again to my manifold. By the way who had the first turbo is300. Mine was done the week of aug 2,2001.
 

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What heater hose are you talking about?
 

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Mr. Negative
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he's probably talking about the heater core hose that connects below the throttle body. It sends the warm water through it and will warm the throttle body in the cold weather. Mine's disconnected, but I live in Ga so it doesn't get that cold here.

SophieSleeps said:
What heater hose are you talking about?
 

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Do you drive your IS daily? If not, you can always check the plugs. I know isman was having that problem.
 

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IS_Dude said:
he's probably talking about the heater core hose that connects below the throttle body. It sends the warm water through it and will warm the throttle body in the cold weather. Mine's disconnected, but I live in Ga so it doesn't get that cold here.

SophieSleeps said:
What heater hose are you talking about?
Ahhh... I get.

But I'm wondering...why would you disconnect it. Is it for the temp differences or for some other reason?

And when you say disconnect, do you mean re-route it so it doesn't pass underneat the TB?
 

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Glad you got it fingered out Derek.

De: Yes, the water hose is bypassing the tb. This is good in the summer for when you don't need 200 degree coolant flowing through the TB increasing air temps slightly. But in the winter it should be put back on if your in a cold climate like we're experiencing right now up here.

BTW, Welcome back... How was the cruise? Any pics of the chika chika's?


Kane

SophieSleeps said:
IS_Dude said:
he's probably talking about the heater core hose that connects below the throttle body. It sends the warm water through it and will warm the throttle body in the cold weather. Mine's disconnected, but I live in Ga so it doesn't get that cold here.

SophieSleeps said:
What heater hose are you talking about?
Ahhh... I get.

But I'm wondering...why would you disconnect it. Is it for the temp differences or for some other reason?

And when you say disconnect, do you mean re-route it so it doesn't pass underneat the TB?
 

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Kanine21 said:
Glad you got it fingered out Derek.

De: Yes, the water hose is bypassing the tb. This is good in the summer for when you don't need 200 degree coolant flowing through the TB increasing air temps slightly. But in the winter it should be put back on if your in a cold climate like we're experiencing right now up here.

BTW, Welcome back... How was the cruise? Any pics of the chika chika's?


Kane

SophieSleeps said:
IS_Dude said:
he's probably talking about the heater core hose that connects below the throttle body. It sends the warm water through it and will warm the throttle body in the cold weather. Mine's disconnected, but I live in Ga so it doesn't get that cold here.

SophieSleeps said:
What heater hose are you talking about?
Ahhh... I get.

But I'm wondering...why would you disconnect it. Is it for the temp differences or for some other reason?

And when you say disconnect, do you mean re-route it so it doesn't pass underneat the TB?

How do you disconnect it/bypass it by the TB?
 

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Mr. Negative
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you take where it goes into the throttle body and connect it to where it comes out of the throttle body.

It flows from the front side to the backside of the throttle body from what I remember. Maybe someone will remember for sure.

stick said:
Kanine21 said:
Glad you got it fingered out Derek.

De: Yes, the water hose is bypassing the tb. This is good in the summer for when you don't need 200 degree coolant flowing through the TB increasing air temps slightly. But in the winter it should be put back on if your in a cold climate like we're experiencing right now up here.

BTW, Welcome back... How was the cruise? Any pics of the chika chika's?


Kane

SophieSleeps said:
IS_Dude said:
he's probably talking about the heater core hose that connects below the throttle body. It sends the warm water through it and will warm the throttle body in the cold weather. Mine's disconnected, but I live in Ga so it doesn't get that cold here.

SophieSleeps said:
What heater hose are you talking about?
Ahhh... I get.

But I'm wondering...why would you disconnect it. Is it for the temp differences or for some other reason?

And when you say disconnect, do you mean re-route it so it doesn't pass underneat the TB?

How do you disconnect it/bypass it by the TB?
 

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The coolant tube goes from near the firewall to the underside of the TB that is closest to the firewall. The outlet is where the TB connects to the Y on the intake manifold.
 

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Mr. Negative
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thanks De! I wasn't sure so I'm glad someone spoke up.

SophieSleeps said:
The coolant tube goes from near the firewall to the underside of the TB that is closest to the firewall. The outlet is where the TB connects to the Y on the intake manifold.
 

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Discussion Starter · #19 ·
yip thats heater hose helped, but the problem returned today. 4250rpm the car starts to miss fire. No codes.
 

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what plugs are you running?
 
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