Skip the auto shop - Our mechanics make house calls

Q: Key won't turn over, 2009 Pontiac G8

asked by on

I went out to my car this morning, and it wouldn’t start. I turned the key, and it turns over but nothing else. I took a guess that it’s the fuel pump, and so I replaced that. But my car still won't start. Do you have any ideas of what I should look at? What else could it be?

A: An engine that cranks but doesn’t start is ...

An engine that cranks but doesn’t start is lacking one or more of the following: compression, fuel, or spark. You need to check for each of the following to determine the cause. You can check fuel pressure using a dedicated gauge at the fuel rail. Proper injector control can be checked using a noid light inserted into the harness side of the injector connector. Spark can be checked using an inline spark tester and compression can be checked using a compression and or leak down gauge. I recommend that you have a trained professional diagnose the starting issue for you firsthand. The team at YourMechanic is an excellent option since we make house calls and can save you a tow bill.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car will not start, no spark - 1994 Ford E-350 Econoline Club Wagon

Besides checking the engine and fuel injection fuses and relays, it is possible the oil pressure cutoff switch may be malfunctioning since the vehicle sat up so long without oil pressure. If the engine oil pump isn't priming, there might...

Q: What grade of gas should I put in my 2008 grand prix

Your car should run just fine on 87 octane fuel unless you have other modifications to your car such as a super charger or turbo charger. The knocking may suggest that you have something else wrong with your engine. Your...

Q: Very slow acceleration starting. 1990 Volkswagen Cabriolet

Hello. There could be a problem with the throttle cable that goes from the gas pedal to the throttle body. There could also be a problem with the throttle position sensor in that it may not be reading the proper...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...