Truck will not move when transmission is shifted into drive

1998 DODGE RAM
225,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
Avatar
SAMANTHA DANIELLE
  • MEMBER
  • 1 POST
Starts rough idle put in drive give it gas it just sputters and wont move. Take the oil cap off and it is pulling sucking a lot of air in. just did a full tune up.
May 18, 2021 at 5:55 PM
Advertisement
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Couple questions to start.

First, was this an issue before you did a full tune up? Next, does it move if you put in reverse or low gear range?

Last, when you pull the oil cap off and it is sucking air then that points to a restriction or issue in the PCV so let's start with this. Also, we are going to have to check for a vacuum leak.

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

I suspect you have two issues but we need to start with this info and go from there. Thanks
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 20, 2021 at 11:27 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.