Q: 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.

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?
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. Q: Truck will crank but will not start

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: Auto transmission is not going into overdrive.

Hi there. The transmission may have burnt clutches in the overdrive clutch pack. The solenoids for this transmission would not go out without effecting more gears. Check the fluid to the transmission and see if it is dark red or...

Q: Q: Car has problems starting.

This code means that there is a configuration problem with your instrument cluster module. This could mean that the instrument cluster module was not reprogrammed after installation. I would contact the shop where you had the work done and ask...

Q: S10 2.8 to 3.4 engine swap. Crank but no start.

Hi there. Check the spark plugs and make sure that they are creating enough spark to allow the fuel to burn. If there is great spark and the engine acts like it does not want to start, then there could...

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...