hi guys i have a 1995 dodge dakota and it idles fine when cold and drives fine when cold but when warm it idles fine but as soon as you give it gas when its warm it sputters and dies replaced the iac valve already made a little difference but still stalls when you press on the gas any help would be great

 

Have you tried reading the codes with the key on-off 3 times?

 

coolant temp sensors?

 

Check in order:

Oxygen sensor
Throttle position sensor
Crankshaft position sensor
Fuel pump (check pressure and volume)

I would check the oxygen sensor first. When you start cold, the truck uses open loop mode - no feedback from oxygen sensor to adjust the fueling. When it warms up, it will use the oxygen sensor to adjust the mixture.

Malfunctioning crankshaft position sensors can cause temperature related problems. Sometimes these sensors behave erratically when hot / cold.

It seems like a sensor related problem. Incorrect calculation of the fuel mixture or insufficient fuel going to the engine.

 

agree

 

If the coolant temp sensor was acting up, I would think the truck would run like crap when cold, not warmed up.

To me it seems like something in closed loop mode (with oxygen sensor feedback) or something changing with temperature (crankshaft position sensor, fuel pump).

But go ahead and check the coolant temp sensor as well. Won't hurt.

When coolant temp sensors fail, they usually have infinite resistance, which means the truck will run very rich to start.

 

mine went bad on my 90, acted the same as OP describes

 

Interesting. If you find out what it is let us know. Would be interested to hear what it was.