Skip the auto shop - Our mechanics make house calls

Q: Truck will crank but will not start

asked by on

One day my truck wouldn't start, after two tries she started right up. Slowly this got worse to the point that it will only crank. It will crank, but it won't start. Replaced the fuel pump and the crankshaft position sensor because we thought they were the solution to the problem, but it still won't start. Out of coincidence, it has randomly started twice; once when testing the inertia switch under the glovebox with a light tester, and once when we removed the positive line from the battery. In both cases we turned off the car and tried once again to start it up, but it refused and only cranks. One thing is that the theft light rapidly blinks when the key is turned to the on position, and when the vehicle is off the theft light casually blinks. Once the key is turned to the on position for a minute or two, the theft light blinks more slowly, but truck still won't start. Battery was also replaced about a month or two ago.

My car has 155000 miles.
My car has an automatic transmission.

A: The best way to approach a starting issue l...

The best way to approach a starting issue like this is to break it down and start with one system at a time. Keep it as simple as possible. If you have not already checked for spark, you will want to use a tester to do so. Check every plug. The fuel system will have needed a new fuel filter with the pump, and if you did not replace the filter, do that immediately.

You will also want to test the fuel pressure when starting and make sure the system is providing the engine with what it needs. You can also test the resistance and other stats on the injectors and make sure they are within specifications. And as always when making multiple repairs, verify the repairs you made previously are holding. Check all electrical connections, mounting bolts, torque specs, ect.

To avoid any unnecessary repairs, have a certified technician, like one from YourMechanic, diagnose your no start condition and help you fix it accordingly.

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: Ticking noise in engine - 2002 Ford Explorer

Hi there. First, check the oil level to the engine. If the level is low, then fill up the oil and check for any leaks. If the level is normal, then I recommend adding 1 quart of ATF (automatic transmission...

Q: Car dies after going 5 to 20 miles. If it sets for 2 to 24 hours it starts again and goes 5 to 20 miles.

Hi there. The issue is with the ignition switch. The switch has a faulty tumbler and disconnects the wiring in the steering column. The best thing to do is replace the ignition switch and check the wiring in the steering...

Q: My car sounds really loud when I crank it every morning

Hi there. Not sure what you mean by "extremely loud"; whether you have an exhaust leak (sounds like there is hole in the muffler), mechanical noises (cam actuators have leaked down, and are noisy until oil pressure comes up), worn...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.