After engine swap the car will not accelerate past five MPH?

2014 NISSAN ALTIMA
140,000 MILES • 2.5L • 4 CYL • 2WD • AUTOMATIC
Avatar
ROBERMUDEZ
  • MEMBER
  • 1 POST
The car had a bad engine, so I got the engine swapped. The car would run fine before engine swap. Now that the engine has been swapped it won't pick up speed. I hold the pedal down and it just doesn’t go above 5 MPH. What could be the problem?
Jun 27, 2023 at 1:46 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

If you place it in neutral or park, does the engine rev normally? Also, have you scanned for diagnostic trouble codes?

If you haven't checked for codes, that is where I would recommend starting. Actually, I would suggest scanning the can-bus.

CAN stands for controller area network. Basically, the different modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing a code.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Also, when it is running, let me know if there are any odd odors from it or sounds.

Let me know.

Joe



Jun 27, 2023 at 8:27 PM
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.