Shuddering and Stall issue?

Hi,

Since you feel this when it's placed in gear, I would start by checking for engine mounts. Additionally, I would suggest checking if there are vacuum leak.

First, check if there are leaks. Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, inspect the motor mounts for worn or dried rubber grommets.

Let me know what you find, additionally, let me know if you have access to a live data scanner.

Joe

Hi,

No, that wouldn't cause a stall. Since this isn't an issue when the engine is warm, it is not likely to be an issue with the idle control.

Do me a favor. Since you have a live data scan tool, try this. Before starting the engine cold in the morning, hook up the scan tool and see what the engine coolant temperature is signaling to the PCM. The temperature should be really close to the ambient temperature. If it is off, that can cause an issue like this.

Next, after driving it and the engine reaches operating temperature, check the short-term fuel trims. Let me know what they are. This will tell me if there is too much or too little fuel getting to the engine.

Let me know what you find.

Take care,

Joe

Hi,

Did you try finding the leak using the link I attached above?

Let me know.

Joe