Starts then dies

Josh_J

New Member

Jul 17, 2019

5

0

1

Wisconsin

Apr 8, 2020

#1

• Apr 8, 2020

• #1

My 1994 cobra recently had been dieing after starting if it warms up. If I rev it up around 3500k it will go back down and stutter out and stall. If the engine is warmed up, it will start out right after I start it up. If I feather the gas, it stays alive. I don't know where to start or figure out what is going on

 

Noboostedgt

Member

Jan 10, 2019

17

1

13

Vancouver,wa

Apr 12, 2020

#2

• Apr 12, 2020

• #2

Idle air control valve would be a good place to start. Take it off and make sure it's not plugged up. If it is spray it out with some brake cleaner or electrical cleaner.

 

Josh_J

New Member

Jul 17, 2019

5

0

1

Wisconsin

Apr 15, 2020

#3

• Apr 15, 2020

• #3

I cleaned it out nice with mass air sensor, it seemed to work nice. I took it for a sort drive to warm up the car, once I got home it seemed to come back. I tired to start it up and test it and it once again was back to just starting and dieing

 

Noboostedgt

Member

Jan 10, 2019

17

1

13

Vancouver,wa

Apr 16, 2020

#4

• Apr 16, 2020

• #4

Josh_J said:

I cleaned it out nice with mass air sensor, it seemed to work nice. I took it for a sort drive to warm up the car, once I got home it seemed to come back. I tired to start it up and test it and it once again was back to just starting and dieing

Click to expand...

Try to start it with unplugged. I might be wrong but I seem to remember being told that's a way to test it.

 

Noboostedgt

Member

Jan 10, 2019

17

1

13

Vancouver,wa

Apr 16, 2020

#5

• Apr 16, 2020

• #5

Josh_J said:

I cleaned it out nice with mass air sensor, it seemed to work nice. I took it for a sort drive to warm up the car, once I got home it seemed to come back. I tired to start it up and test it and it once again was back to just starting and dieing

Click to expand...

It's most likely sticking open or closed. Since cleaning it temporarilyfixed I'd either try to clean it again or replace the iac.

 

F

Fox86

Member

Nov 9, 2020

22

7

13

Siegen - Germany

Mar 31, 2021

#6

• Mar 31, 2021

• #6

Hi guys, maybe somebody can help me. I have exactly the same problem. 86 Fox without MAF runs great when cold. When the engine is heated up and I start again it dies. I already checked the IAC and cleaned it, but still the same problem. I can keep it alive when feathering the gas, but that is not how it should work. Couldn't find additional ideas, so maybe you can help me. Thanks.

 

Potomus Pete

I'm still waiting for the fully nude shots

5 Year Member

Mar 7, 2019

3,308

1,223

153

Sarasota Florida

Mar 31, 2021

#7

• Mar 31, 2021

• #7

I had that problem six months ago. Throttle Position Sensor was the problem.

 

F

Fox86

Member

Nov 9, 2020

22

7

13

Siegen - Germany

Apr 2, 2021

#8

• Apr 2, 2021

• #8

Thanks! I will check it tomorrow!

 

F

Fox86

Member

Nov 9, 2020

22

7

13

Siegen - Germany

Apr 3, 2021

#9

• Apr 3, 2021

• #9

Checked the TPS, receives 0.95 volt. Should be good. Problem still there. When I restart with warm engine it starts goes up and down and Finally dies. After 5min drive everything works again and it’s stable. Any other ideas?

 

Potomus Pete

I'm still waiting for the fully nude shots

5 Year Member

Mar 7, 2019

3,308

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Sarasota Florida

Apr 3, 2021

#10

• Apr 3, 2021

• #10

Did you ever take off your throttle body and clean it real good.

 

F

Fox86

Member

Nov 9, 2020

22

7

13

Siegen - Germany

Apr 3, 2021

#11

• Apr 3, 2021

• #11

Potomus Pete said:

Did you ever take off your throttle body and clean it real good.

Click to expand...

Yes! One week before...still same behavior:/

 

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

2,745

194

Kearney, NE

Apr 3, 2021

#12

• Apr 3, 2021

• #12

I do not know your answer, but starting and stalling in the morning sounds like a familiar personal problem.

Is there a base idle setting procedure on the modular engines like on the
EEC IV 5.0???