Skip the auto shop - Our mechanics make house calls

Q: Truck cranks but, doesnt start?

asked by on

Truck cranks but doesn't start. I thought it was the fuel pump because I could not hear it turn on anymore so I bought a new on and nothing. I also checked all the fuses and there all good. But for some weird reason we checked for juice the wires that connect with the fuel pump and when they are not connected they have juice but when connected they done hmmmm... So then I checked the fuel trip button and it was pressed down so I looked a little closer and where the wire plugs into the switch box it seems to be burnt. And keep in mind that when I try to start the truck no fuel comes out of the fuel pressure valve any help will be very appreciated thank you!!

My car has 224000 miles.
My car has an automatic transmission.

Hi there. From the description you have provided, you may have located the problem. The fuel trip button/inertia switch is the there to disable power to the fuel pump in the event of an accident. The connector being burnt may be the result of a poor electrical connection or high current draw from the original fuel pump and would explain the loss of power when the new fuel pump electrical load is placed on this circuit. Replacing the inertia switch and connector, may resolve the lack of power to the fuel pump. I recommend having your vehicle’s no start be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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: Keyless entry

Hi there. Unfortunately, this is one of those things you will have to contact the dealership to complete. Issues with security codes, keys or security systems are only offered by authorized dealerships of the manufacturer to ensure vehicle security protocols...

Q: Missing throughout driving range.

The 2.3 L engine is a very dependable engine that has been around for a long time. If the misfire code is always for cylinder number 3 then you will have to look at the possible problems with that cylinder....

Q: Can a P0455 Code on a 2005 Pathfinder need an ECM reprogram to fix?

Hi there. A P0455 code indicates that there has been a large evaporative system (fuel vapor control system) leak; note the word system as this includes physical and electrical components.. This means that there could be a leak anywhere in...

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 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...