missing when hot

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Jul 6, 2006

#1

• Jul 6, 2006

• #1

my buddy has a 94 5.0 and it is overheating and we cant figure it out. he now says it is missing when it gets up to temp. Any suggestions?

 

302RollinHard

New Member

Sep 26, 2005

0

0

0

Columbus, OH

Jul 6, 2006

#2

• Jul 6, 2006

• #2

The TFI is very susceptable to heat. I would think that would be the missing problem, as for the overheating (which I would be more concerned about) more information is needed to have an opinion of the problem. ( what was changed before the problem, if anything, if the system will pressure test (are there leaks) etc.

 

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Jul 6, 2006

#3

• Jul 6, 2006

• #3

Im not a 5.0 guy and not sure what a TFI is. Im trying to get more info on the overheating

 

blacksheep2

New Member

Jul 6, 2006

9

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0

Jul 6, 2006

#4

• Jul 6, 2006

• #4

well the car in question happens to be my ride there was some leaks the around the thermostat the goosneck was warped i replaced that also the radiator had a leak and i replaced that also as far as a system will pressure test i have not had that done yet

 

legalize420

Active Member

May 21, 2005

1,541

1

37

South Florida

Jul 6, 2006

#5

• Jul 6, 2006

• #5

when you added the coolant did you burp the system?

 

WHITE94COBRA

New Member

Nov 14, 2003

816

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HUNTINGTON BEACH

Jul 6, 2006

#6

• Jul 6, 2006

• #6

I'm dealing with a warped head on my dads camaro right now, It overheated and warped the heads, so were getting a bad miss....

 

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Jul 7, 2006

#7

• Jul 7, 2006

• #7

anybody else have any ideas?

 

blacksheep2

New Member

Jul 6, 2006

9

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0

Jul 10, 2006

#8

• Jul 10, 2006

• #8

burp

legalize420 said:

when you added the coolant did you burp the system?

Click to expand...

yes I did do that. yesterday i flushed the system again and still she is running hot.

 

Jeffrostang

Founding Member

Jan 4, 2001

335

0

16

Richmond, VA

Jul 10, 2006

#9

• Jul 10, 2006

• #9

My car is doing the same thing... I replaced the water pump and now it runs even hotter. Not sure how to fix it either

 

HISSIN50

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

15 Year Member

Nov 29, 1999

31,179

33

129

Jul 10, 2006

#10

• Jul 10, 2006

• #10

BS2, does it consistantly miss when hot?

First thing is pull codes (even if your CEL is not on). While doing so, get the car to miss and run a cylinder balance test.

The TFI idea is a pretty good one. The parts houses will often test them for free. In your case, You'd ask them to test it multiple times to heat it up.

Anything else is just gonna be wild guessing. Folks need more info to go on.
Good luck and welcome!

 

BlackVert

15 Year Member

Oct 3, 2003

5,589

9

98

Bethesda, MD

Jul 10, 2006

#11

• Jul 10, 2006

• #11

mine was missing when hot and it was a couple of bad spark plug wires

good luck

 

blacksheep2

New Member

Jul 6, 2006

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0

Jul 11, 2006

#12

• Jul 11, 2006

• #12

hot in c-ville

i have had the codes read and none come up even while hot im at a loss as to what to do next

HISSIN50 said:

BS2, does it consistantly miss when hot?

First thing is pull codes (even if your CEL is not on). While doing so, get the car to miss and run a cylinder balance test.

The TFI idea is a pretty good one. The parts houses will often test them for free. In your case, You'd ask them to test it multiple times to heat it up.

Anything else is just gonna be wild guessing. Folks need more info to go on.
Good luck and welcome!

Click to expand...

 

Jeffrostang

Founding Member

Jan 4, 2001

335

0

16

Richmond, VA

Jul 11, 2006

#13

• Jul 11, 2006

• #13

My temp is way high when it is hot out and the other day in the late evening(cooler), the car didn't even get up to temp. Was just over the normal line the entire trip. I'm going to replace the thermostat just to eliminate it and its good insurance anyway.

 

BlackVert

15 Year Member

Oct 3, 2003

5,589

9

98

Bethesda, MD

Jul 12, 2006

#14

• Jul 12, 2006

• #14

done the tuneup stuff lately? replacing the spark plugs, wires, rotor, cap, fuel filter, clean the maf ... ?

 

blacksheep2

New Member

Jul 6, 2006

9

0

0

Jul 13, 2006

#15

• Jul 13, 2006

• #15

doing it

I am going to be doing tis to day also i am going to replace my computer or ecm hope this works.

BlackVert said:

done the tuneup stuff lately? replacing the spark plugs, wires, rotor, cap, fuel filter, clean the maf ... ?

Click to expand...

 

blacksheep2

New Member

Jul 6, 2006

9

0

0

Jul 14, 2006

#16

• Jul 14, 2006

• #16

still hot & missing

did all that except the ecm and im still missing not runing as hot but still up there

 

blacksheep2

New Member

Jul 6, 2006

9

0

0

Aug 2, 2006

#17

• Aug 2, 2006

• #17

hot no more

well come to find out that my fan was not kickning on and my radiator had a crack in it im still heasitating got no clue have changed plugs wires and even the coil what next

 

HISSIN50

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

15 Year Member

Nov 29, 1999

31,179

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129

Aug 2, 2006

#18

• Aug 2, 2006

• #18

Nice work so far - you're replacing stuff that needed replacing even if it didnt help your miss.

If not mentioned: if it misses consistantly at idle, I'd run a cylinder balance test (it's the computer's way of figuring out which cylinder is missing and to what degree).

You do it as part of the code retrieval process (after KOER, as I recall). Takes 1 minute and gives great info that otherwise can take awhile to ascertain.

Good luck with it.

 

QUIKSVT

New Member

May 19, 2006

93

0

0

Aug 2, 2006

#19

• Aug 2, 2006

• #19

blacksheep2 said:

yes I did do that. yesterday i flushed the system again and still she is running hot.

Click to expand...

just out of the blue.. what are you running your timing at???

 

blacksheep2

New Member

Jul 6, 2006

9

0

0

Aug 3, 2006

#20

• Aug 3, 2006

• #20

timing

as of this moment i am wating on a timing light to find out the answer to that question as it stands now ... at idle runs great but when i try to get on her she is heasitating dont know why but the miss is gone now but now i have major heasitation............. Help