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

ROBERMUDEZ

MEMBER
2014 NISSAN ALTIMA
2.5L
4 CYL
2WD
AUTOMATIC
140,000 MILES

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?

Tuesday, June 27th, 2023 AT 1:46 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

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

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Tuesday, June 27th, 2023 AT 8:27 PM