Car chokes bad when air temp sensor gets above 85 degrees

[Turbo_D]

So it has been going on for years now, but I really am getting tired of not being able to drive my GN when it gets warm outside. I can read my air temp sensor on my scanmaster and any time it gets above 85 degrees or so the car just chokes out. It will idle fine but when you hit the gas the car just chokes out and stumbles. You basically have to floor it to get it to go. It will never actually stall, but you definitely look like an idiot with a beautiful GN choking and sputtering down the road.

It is definitely worse when you get stuck in traffic or are leaving a parking lot and the motor is completely saturated by heat.

I have thought maybe the mass air flow? I know these cars are not meant for hot weather especially when modded but if I get stuck in traffic on even an 80 degree day it will do it until I can get the air temp back down by moving down the road.

I do not have a front mount but have an oil and trans cooler in front of the radiator. I don't remember my car doing this when completely stock years ago.

Thanks in advance!

 

[Turbo_D]

Monday morning bump so I can actually drive my car

 

[bogies87]

When it is acting up what does your coolant temp say on the scan master, also what about o2 numbers?

 

[Turbo_D]

I will look next time I'm driving but I'm pretty sure they're both normal. It seems to only have to do with air temp. It chokes like clockwork when that sensor reads hot.

 

[Turbo_D]

If I'm moving down the road I'm fine but if i get stuck at a red light on a hot day I'm screwed. As soon as I get the air temp back down in the 80's it stops doing it.

 

[Slow91z]

Sounds like a chip problem, the fueling should change with temp but sounds like yours needs some tweaking.

 

[Turbo_D]

You're probably right. I don't have another chip for those injectors. Who is the man for custom chips these days?

 

[toomanymodz]

I'd contact Eric
http://www.turbotweak.com/

 

[Slow91z]

I'd contact Eric
http://www.turbotweak.com/

X2

 

[aminga]

The fueling doesn't change THAT much with air temperature. You can unplug the Air Temp sensor and it should still run. I'm guessing (and only guessing based on the evidence) that something else is wrong like a MAF.

Try uplugging that after startup and going for a drive.

 

[Turbo_D]

I'm pretty sure there is a turbotweak chip in the car but I will check.

So you can unplug the MAF after the car is running and it will drive normally? Crazy, I will try it.

 

[aminga]

I'm pretty sure there is a turbotweak chip in the car but I will check.

So you can unplug the MAF after the car is running and it will drive normally? Crazy, I will try it.

Define "Normally". It will run in failsafe mode, set a code and fall back to the calpac. It won't run well but I've used that trick for diagnosing MAF's that pass the tap test but still won't run the car.

 

[Turbo_D]

Understood. I will try it this weekend.