Skip the auto shop - Our mechanics make house calls

Q: I can't get the car to turn over

asked by on

It like there no when you try to turn it over theres nothing i have all the dash lites working and iv change the starter put a different computer on it and I don't have fuel pressure either
My car has an automatic transmission.

To start, computers, aka PCM (powertrain control modules) rarely fail. They are complex units that require many different inputs to initiate the desired response. Having replaced your PCM already, you may have already traded in your old PCM as a core. If you happen to still have it, I would plug it back in and continue by doing some testing at the starter relay. From the relay you can check to see if it is the PCM that isn’t commanding the relay to supply power to the starter ored if there is something else wrong.

It is possible the relay is the source of the problem. You will need a wiring diagram and then you can use a jumper wire to supply power to the starter solenoid from the relay connector. If the starter turns over, you have confirmed that this part of the starter system is good.

Having replaced the PCM, this is likely the cause of the lack of fuel pressure. As far as why it won’t crank, you have complicated the issue by replacing the PCM. The new PCM needs to be programmed using a professional scan tool. If you have already done this, then you can begin diagnosing the no crank, assuming the PCM has been successfully programmed.

If you should still need help with this diagnosis, I recommend the following inspection to help you out. A certified professional from YourMechanic can come to your car’s location to diagnose the starting issue and assist with repairs.

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
  1. Home
  2. Questions
  3. I can't get the car to turn over

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Dash lights not working

It sounds like you are having a problem with the dimmer switch that controls the brightness of your dash lights. Either that, or you have blown a fuse for the dash lights. The dimmer switch malfunctioning would be a more...

Q: Heater Core

The clicking noise may not necessarily be associated with a faulty heater core as this is usually also accompanied by the heater not generating heat and in some cases the motor overheating as you know. The heater core is a...

Q: Fuel pressure low - 1991 Plymouth Voyager

Hi there. If the fuel pump pressure is lower than it should be, it may impact the vehicle's ability to start and run efficiently. However, 3 lbs. shouldn't be the only item that may be faulty on your Voyager. You...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...