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Car getting hot at hight speeds for extended periods.

  • Thread starter Thread starter The Green GT
  • Start date Start date Apr 23, 2006

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
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99
Louisiana
Apr 23, 2006
#1
  • Apr 23, 2006
  • #1
I normally drive my car to work and back, and to my friends and back, no really long trips. Today I went on a 70 mile trip and once I get on the highway my temp gauge goes up to the M in NORMAL. Its actually between the M and A. Once I get to the place I was going and start having to slow down, stop, and start, it goes back to normal.

 

bill302

Active Member
Nov 2, 2005
2,131
1
46
alabama,gadsden
Apr 23, 2006
#2
  • Apr 23, 2006
  • #2
have you checked your coolant level.
 

KasperG

New Member
May 20, 2005
38
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0
Apr 23, 2006
#3
  • Apr 23, 2006
  • #3
Check all the things that have to do with the fan. I think the ccrm on some years had a dual speed fan relay in it. It might be bad. The first thing I would do is check to see if the fan motor is working. Start with the simple things and then spend money.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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Apr 23, 2006
#4
  • Apr 23, 2006
  • #4
If it is only an issue at speed, I would not look at the fan (if the car cools while going slow and stopped, the fan should be working). Look for something more like a slightly clogged radiator and make sure the little air dam under the car is present. It helps a little with the radiator's air flow dynamic (it's not real important, but every bit helps).

What kind of RPM do you turn on the highway? Aftermarket gears?

Good luck.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
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Apr 24, 2006
#5
  • Apr 24, 2006
  • #5
Coolant is fine, actually a little over full. But not much. And its usually around 2200-2500 once I get to about 80-85. Stock gears. The air dam isnt those two peices of plastic along the outside of the radiatior right by the air bag impact sensors is it? Cause they are fine but I was cursing them when I was putting my headlights on.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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129
Apr 24, 2006
#6
  • Apr 24, 2006
  • #6
The Green GT said:
Coolant is fine, actually a little over full. But not much. And its usually around 2200-2500 once I get to about 80-85. Stock gears. The air dam isnt those two peices of plastic along the outside of the radiatior right by the air bag impact sensors is it? Cause they are fine but I was cursing them when I was putting my headlights on.
Click to expand...
Nope - I know which ones you mean though. Wait, you got mad while installing your headlights? I had no idea.

It's the little strip that's under the car itself (it will be what gets torn off by a curb, steep driveway, etc). It helps create a low pressure area behind the radiator.

Turning those RPM might simply be more heat than the radiator can reject with that amount of load on the motor.............. But only you would be able to judge that.

Good luck.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
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99
Louisiana
Apr 24, 2006
#7
  • Apr 24, 2006
  • #7
I dont think its too many RPM's for the radiator to handle. I have driven this route many times and it never got this hot. And is the air dam the lip under the bumper?
 
S

slocomo

New Member
Mar 19, 2006
48
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0
Apr 24, 2006
#8
  • Apr 24, 2006
  • #8
install a 180 degree thermostat.
 
S

slocomo

New Member
Mar 19, 2006
48
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0
Apr 24, 2006
#9
  • Apr 24, 2006
  • #9
reply

I say install a 180 degree thermostat.
 
D

dallas863

New Member
May 30, 2005
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0
Clinton, Mississippi
Apr 24, 2006
#10
  • Apr 24, 2006
  • #10
I had the same problem. It turned out that I didn't have a chin spoiler. Once I installed a new one the temp ran normal at highway speeds.
 

mo_dingo

20+ Year Stangneter
Aug 26, 2003
3,031
2
58
Tucson, AZ
Apr 24, 2006
#11
  • Apr 24, 2006
  • #11
I wonder if this is a egr problem (doubt it though). Because that is the only thing I can think of that runs at part throttle but not idle and wot.

Just out of curiousity, when you ran it on the highway, did you have the a/c on? What about when you were in the city?
Scott
 

chefster

New Member
May 24, 2004
426
1
0
michigan
Apr 25, 2006
#12
  • Apr 25, 2006
  • #12
check out my thread on air dam,it works great,had the same problem;gone
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
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Louisiana
Apr 25, 2006
#13
  • Apr 25, 2006
  • #13
mo_dingo said:
I wonder if this is a egr problem (doubt it though). Because that is the only thing I can think of that runs at part throttle but not idle and wot.

Just out of curiousity, when you ran it on the highway, did you have the a/c on? What about when you were in the city?
Scott
Click to expand...
I usually have the A/C off in the city but when I was on this particular trip I had it on the whole time.

And i have a chis spoiler but mine looks like its never went all the way around, just aobut 2 feet on each side.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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Apr 25, 2006
#14
  • Apr 25, 2006
  • #14
The Green GT said:
And i have a chis spoiler but mine looks like its never went all the way around, just aobut 2 feet on each side.
Click to expand...
Actually, you are missing it. The important piece is the one that goes in between those two side pieces (there is a piece that goes across the middle). It cost me about 15 bucks at the dealer or from LRS to get one. A curb and previous owner might have taken care of your old one...........
 
S

STM1965

Member
Mar 24, 2003
185
0
16
Ontario
Apr 25, 2006
#15
  • Apr 25, 2006
  • #15
Is it doing anything else weird?

There is a second control module that regulates RPM, ABS, AC & TEMP at which the fans cycle. Mine was idling & stalling and would do this several times when cold starting in the morning, it would then allow the temp to shoot up into the M/A area as you describe, before the fans came on which is way to late to pull the heat back out.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
19
99
Louisiana
Apr 25, 2006
#16
  • Apr 25, 2006
  • #16
HISSIN50 said:
Actually, you are missing it. The important piece is the one that goes in between those two side pieces (there is a piece that goes across the middle). It cost me about 15 bucks at the dealer or from LRS to get one. A curb and previous owner might have taken care of your old one...........
Click to expand...
But why would it JUST start doing this?


EDIT: Do you think taking off that black plastic radiator cover in combination with the missing dam would make it do that? I took it off to put on my lights and decided to repaint it black and do the letters blue so I havent put it back on yet.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Apr 25, 2006
#17
  • Apr 25, 2006
  • #17
The Green GT said:
But why would it JUST start doing this?


EDIT: Do you think taking off that black plastic radiator cover in combination with the missing dam would make it do that? I took it off to put on my lights and decided to repaint it black and do the letters blue so I havent put it back on yet.
Click to expand...
I dont think the lack of the vanity cover above the radiator has one thing at all to do with it. I now get it about the issues just now cropping up with your cooling system. I thought it might have gotten warmer (ambiently) in recent weeks, enough-so to perhaps show a new issue. We dont know the exact situation nearly as intimately as you; the best we can do is toss out ideas, some of which you can immediately shoot down because you know better than us.

Good luck.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
1,269
19
99
Louisiana
Apr 26, 2006
#18
  • Apr 26, 2006
  • #18
HISSIN50 said:
I dont think the lack of the vanity cover above the radiator has one thing at all to do with it. I now get it about the issues just now cropping up with your cooling system. I thought it might have gotten warmer (ambiently) in recent weeks, enough-so to perhaps show a new issue. We dont know the exact situation nearly as intimately as you; the best we can do is toss out ideas, some of which you can immediately shoot down because you know better than us.

Good luck.
Click to expand...
Yea, I have started to think that its the rise in temp around here recently. Its gets pretty hot in LA.
 

SeventyMach1

Keep it lubed .... keep it straight .... and keep
Mar 30, 2005
1,940
3
36
North Carolina
Apr 26, 2006
#19
  • Apr 26, 2006
  • #19
This is the piece. I need to get one as well. My question is .... does the type of bumper you have (GT ... Cobra ... etc.) effect anything? Does this piece still work with all bumpers?


 
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