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

asked by on October 18, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

My 2002 Saturn Vue's rpms started revving into 4-5k when up shifting. Later that day the clutch went out. Now the starter is out.

Hello, thank you for writing in. The decision to invest in an older car is difficult, even more so when you do not have the car in front of you. A failed clutch can interfere with the flywheel causing the...

My car won't start after replacing flex pipe and Muffler

Technically, there is no connection at all between what was done on the exhaust system and the subsequent no start problem. Of course, it's always possible the Mechanic damaged something on the vehicle but such, if it occurred and if...

Low oil pressure light

Oil pump failure can happen on high mileage vehicles. This is normal due to engine wear and oil pump wear. Before replacing the oil pump, I would suggest having it properly inspected. A qualified mechanic can perform an oil pressure...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Silverado Hybrid
If If you’re looking for a half-ton pickup truck that also gets great gas mileage, look no further than the 2012 Chevrolet Silverado Hybrid. While it has the towing and carrying capacity you’d look for in any regular truck, it...
The Best Used Cars to Buy If You Need a Lot of Trunk Space
Many Many people focus more on interior room than cargo carrying capacity. That’s natural if you have a large family or regularly carpool, but what about drivers who need to carry a lot of stuff most of the time and...
A Buyer’s Guide to the 2013 Chevrolet Spark
The The Chevy Spark nimbly walks the line between being functional and being totally adorable. In the spirit of mini cars past like the Ford Festiva and the Yugo, this spritely little creation offers improved safety combined with the tech...