Cold effects

d3ll · Nov 24, 2007

I purchased a 99 GT in April 07. It had 126K miles on it, but I wanted it badly. I live in the south, and now that it is colder, I noticed that the colder it is outside, the harder it is for the car to start. I brought it to AutoZone and my friend tested it. He said the starter code appeared. The car starts fine when the weather is warm. I have a new Optima Red Top under the hood. The other issue I have is that randomly now the engine shuts down while on the interstate. Could this also be the starter causing the vehicle to shut down, or do I have bigger issues. Lastly, I have 17x8 front and 17x9.5 rears. I need to put new tires on the car, what sizes do you all suggest for good performance, rough roads, and a daily driver all in one?

2000fordstanggt · Nov 24, 2007

sounds like classic iac symptoms. not sure about the tires though.

d3ll · Nov 25, 2007

2000fordstanggt said:
sounds like classic iac symptoms. not sure about the tires though.

What is that, I'm newer than tomorrow.

Killa · Nov 25, 2007

Idle air control . its in front of the Throatle body, it connect to the intake and look like a letter L.

Mustang5L5 · Nov 25, 2007

What was the code number?

Starter code doesn't really say much. The starter doesn't have a sensor, so i don't know how the car would know there was an issue with it.

Is the battery brand spanking new? Did you load test the battery? Not starting easily in cold weather is usually a battery problem. If youve ever had to jump start the car on a dead battery, the batt is now pretty much junk and will never hold the charge the same way.

d3ll · Nov 25, 2007

Mustang5L5 said:
What was the code number?

Starter code doesn't really say much. The starter doesn't have a sensor, so i don't know how the car would know there was an issue with it.

Is the battery brand spanking new? Did you load test the battery? Not starting easily in cold weather is usually a battery problem. If youve ever had to jump start the car on a dead battery, the batt is now pretty much junk and will never hold the charge the same way.

I thought about that too. Here's the answers: Brand new Optima Red Top Battery, load test showed that battery is good as new, never had to jump start even in the coldest weather. I'm MECP 1st Class so I troubleshooted all of the electrical issues that I normally encounter with customer cars.

I google the IAC and found that other people shared my exact pain and a somple solution cured it. Cleaning the IAC seemed to have work for them, so I'll try that also. If that doesn't work, I'll buy a new one. Thanks for all the input though.

Anyone have any suggestions about the tires though?

2000fordstanggt · Nov 25, 2007

d3ll said:
I thought about that too. Here's the answers: Brand new Optima Red Top Battery, load test showed that battery is good as new, never had to jump start even in the coldest weather. I'm MECP 1st Class so I troubleshooted all of the electrical issues that I normally encounter with customer cars.

I google the IAC and found that other people shared my exact pain and a somple solution cured it. Cleaning the IAC seemed to have work for them, so I'll try that also. If that doesn't work, I'll buy a new one. Thanks for all the input though.

Anyone have any suggestions about the tires though?

at that mileage i would recommend just buying a new iac from the dealer. cleaning it would only be a temporary anyway, if that even works at all.

btw- welcome to :SNSign:
oh and just incase you werent 100% sure:

and please make sure you DO NOT buy the autozone iac..i just read your friend works there. go to the dealer for it.

Pearl02 · Nov 25, 2007

A bad IAC will effect the way the car starts. I replaced one on my Mazda B4000 a few yrs back. It was a very cold day and the truck wouldn't start. I removed the IAC and took inside to warm up for 30min. I put it back on and the truck started right up. Sounds like your going down the right track. Pearl02.

Mustang5L5 · Nov 25, 2007

d3ll said:
Anyone have any suggestions about the tires though?

17x8 go with 245/45/17

17x9.5 go with either 275/40/17 or 285/40/17

the 275 will keep the same tire size front and back but the 285 will fill the rim better but be 0.4" taller than the front. You could prob get a 295 on there

fobra559 · Nov 25, 2007

Mustang5L5 said:
17x8 go with 245/45/17

17x9.5 go with either 275/40/17 or 285/40/17

the 275 will keep the same tire size front and back but the 285 will fill the rim better but be 0.4" taller than the front. You could prob get a 295 on there

I got 275/40/17's all around and it does a great job for me so far. I have Conti-Extreme tires. Not bad at all but these tires are pricey for me

d3ll · Nov 25, 2007

Mustang5L5 said:
17x8 go with 245/45/17

17x9.5 go with either 275/40/17 or 285/40/17

the 275 will keep the same tire size front and back but the 285 will fill the rim better but be 0.4" taller than the front. You could prob get a 295 on there

&
at that mileage i would recommend just buying a new iac from the dealer. cleaning it would only be a temporary anyway, if that even works at all.

Thanks, will do both, and will post results.

d3ll · Nov 25, 2007

Mustang5L5 said:
17x8 go with 245/45/17

17x9.5 go with either 275/40/17 or 285/40/17

the 275 will keep the same tire size front and back but the 285 will fill the rim better but be 0.4" taller than the front. You could prob get a 295 on there

BTW, Anyone have any pix?

Mustang5L5 · Nov 25, 2007

When the car stalls on you on the interstate, does it stall when you push the clutch in or at say 2500RPM?

d3ll · Nov 25, 2007

Not with the clutch, not to sure what the RPMs are though. Will check next time I drive.
It seems to happen on the interstate or while turning into a parking lot (like cruising in at about 5-10 mph). Anyway, what could that be if it's at 2500 rpm.

Mustang5L5 · Nov 25, 2007

Well i'm wondering when it's stalling.

Does it stall when you close the TB by letting off the gas? Or can you be crusing part throttle and just have it randomly stall on you.

Stalling when you let off the throttle is more of an indicator it's the IAC.

d3ll · Nov 26, 2007

Mustang5L5 said:
Well i'm wondering when it's stalling.

Does it stall when you close the TB by letting off the gas? Or can you be crusing part throttle and just have it randomly stall on you.

Stalling when you let off the throttle is more of an indicator it's the IAC.

I notice it when I let off the gas.

d3ll · Dec 3, 2007

Thanks all, I changed the idle air control and it runs perfect now (bought a new one from Ford). Also, I got the 245/45r17 and 275/40r17 and it looks and rides great. Thanks again.

2000fordstanggt · Dec 3, 2007

d3ll said:
Thanks all, I changed the idle air control and it runs perfect now (bought a new one from Ford). Also, I got the 245/45r17 and 275/40r17 and it looks and rides great. Thanks again.

and thanks for actually letting everyone know how it turned out.

Cold effects

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That is…until I whipped out my Bissell

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That is…until I whipped out my Bissell

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At least it's more erect and not floppy anymore.

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That is…until I whipped out my Bissell

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