Check engine light after warm?

fox racer

Member

Jun 22, 2004

577

0

16

Staten Island, NYC

May 20, 2005

#1

• May 20, 2005

• #1

ok, when i let my car idle for liek ten minutes or so the check engine light comes on. i just finished gt-40 (aluminum) headswap, roller rockers and exhaust. it runs a littel warm too.. but im guessing thats the heads right? it has a newer radiator, newer water pump, new coolant etc. please help.

 

stang22

Active Member

Jan 29, 2003

1,318

7

38

Washington, D.C.

May 20, 2005

#2

• May 20, 2005

• #2

Hook a tester up to the computer and see what codes you are pulling. AutoZone will let you use thiers and show you how to use it.

Tim

 

ALMOSTFINISHED

Member

Jan 8, 2004

315

0

17

Westchester County NY

May 20, 2005

#3

• May 20, 2005

• #3

I would try and burp the cooling system to make sure all the air pockets have gotten out. You don't want to run aluminum heads to warm. Jack up the drivers side of the car, open the rad cap then let the car run and cycle, (t-stat open and cooling fan cycle if applicable). That should get the air, if any,, out of the system. Whcih may get the temp back down to the right spot. As for the CEL, I would go ahead and have the codes read like stang22 said. Then you can post what # code it was up here on stangnet and we all can help ya get it in the right direction.

Nick

 

fox racer

Member

Jun 22, 2004

577

0

16

Staten Island, NYC

May 20, 2005

#4

• May 20, 2005

• #4

sounds good.. i didnt kno they would let me use it.. ill check for codes and do the coolant thing tomorow... im not driving th car yet anyway

 

camarokiller5.0

New Member

Nov 3, 2004

48

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0

Dallas

May 20, 2005

#5

• May 20, 2005

• #5

if your running a stock two core radiator you might have heating problems, might have to go to a three core or a alum. radiator, i had the same problem after my h/c/i swap, three core fixed it for me. every time i would get on it the needle would start to rise fast! now it wont budge above 1/4

 

fox racer

Member

Jun 22, 2004

577

0

16

Staten Island, NYC

May 20, 2005

#6

• May 20, 2005

• #6

thats the thing.. the needle doesnt move fast. it will rise just a little past stock, and sit there... and not go back down. im gunna check the coolant tomorow.

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

17

89

Dallas, GA

May 20, 2005

#7

• May 20, 2005

• #7

Check your wiring and vaccume connections and read the codes. You might have left something loose. I bet it is most likley an O2 related code due to the fact that it only shows on closed loop.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

May 21, 2005

#8

• May 21, 2005

• #8

with those nice parts, I would really look into tossing an aftermarket temp gauge in there. iron heads can take some heat, but not alum. I would want to know exactly what my temps are.

good luck.