Still struggling with a p0171 code. Ruled out pretty much everything except injectors.

it doesn’t seem right to me that all 4 injectors would be going bad but who knows. How can I test them?
I know they all open and close, but can I accurately see if they are functioning properly beyond that without sending them in?

 

View spray pattern. Remove injectors. Plug in to electrical connector, injector set to spray into empty water bottle.

View spray pattern. Looking for fine mist, no dripping, etc.

 

This is a pretty easy to follow tutorial.

 

Thought this was funny enough to share:

Clicked on the video and took the link to the Amazon site selling it.

At the bottom of the page, below the massive number of 1-star rankings. was Items You May Enjoy: dental WaterPiks.

-- Chuck

 

Ha! Same concept different applications.