Van stalls after driving approx 1/4 mile

RCARLONI

MEMBER
1992 DODGE RAM

I have a Dodge Ram Van with 5.2L FI engine with approx. 145,000 miles. When I start it cold, it starts with no problems and runs good and after it warms up it runs good. But after a cold start and driving it for about 1/8-1/4 mile it stalls out and is hard starting. (Basically have to give it full gas to get it started). Once it warms up it is fine. I replaced the plugs, wires, cap and rotor as well as new EGR valve and pick up coil.

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

This is most likely either fuel related, or it is an air fuel ratio issue when the engine is cold.

Here is a guide that will get us started:

https://www.2carpros.com/articles/engine-stalls

I would suggest starting with checking the fuel pressure when this acts up.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If the fuel pressure is okay, then we need to unplug the MAP sensor and see if the engine still stalls. If it does then it is not reading correctly and so the PCM is not able to match the air with the proper amount of fuel until it warms up and is able to adjust it once it starts us o2 sensor data.

I attached the info below on the MAP sensor for your review.

While you are unplugging the MAP, I would suggest inspecting the throttle bore and make sure it is not restricted.

https://www.2carpros.com/articles/throttle-actuator-service

Please run through all this info and let us know what you find. Thanks

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