Skip the auto shop - Our mechanics make house calls

Q: Dodge Charger will not run after engine swap

asked by on

My 2006 Dodge Charger R/T was swapped from a 5.7L to a 3.5L v6. The car would not run so the mechanic swapped the transmission to fit the 3.5L. He also swapped the throttle body, wire harness, control module, and the starter. The computer was not working so it got swapped and reprogrammed. The car still won't run. Any suggestions?

My car has 10000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. If the 3.5l V6 &...

Hi, thanks for writing in. If the 3.5l V6 "donor" engine/transmission was verified as running before the swap, make sure EVERYTHING from that running combination is installed and configured as it was previously in the running vehicle - components, wiring, software levels in the engine/transmission controllers, etc. Any variation from that configuration means an unknown configuration and problems - as you have experienced.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Automatic transmission problems after engine swap

Hello there, thanks for writing in. If the issue occurred after the engine was swapped, then it may be possible that the issue is related to the swap. The symptoms you describe can be caused by a variety of issues...

Q: When I go to crank my car the key stays in the start position and the car is constantly trying to crank itself.

First, let's make sure about some terminology before I proceed. I will assume the motor is actually turning over. If the car is trying to start, the motor has to be turning over or it is not trying to start....

Q: AC makes hissing noise on a 2000 Dodge Durango

If it's actually hissing, it must have a pretty big leak. You can try adding some refrigerant and it might work. But, if it's hissing, it's not going to last long because it has a pretty big leak there. Knowing...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.