Q: My truck won't start. I put a new fuel pump, cam shaft sensor, cleaned my crank sensor, and put a new battery in it. It will crank but not start.

asked by on

I was driving and before it broke, I noticed that it didn't accelerate as fast as it normally would. A few days later, I went to work, and parked my truck, when I got out of work I went to start it but It didn't turn on, it would crank but it didn't start, so I thought the battery was dead, So i put a brand new battery and still nothing. Finally it started but the rpms went to about 4000 but it dropped and the truck died. I tried again the rpms went up again but this time it controlled it self. I was driving and then it died again. So I tried the something has before. After the second time it didn't was to start anymore so I pulled it home. Put the new fuel pump, it worked and started but then died. After the second time trying it stayed on for about 1hr or more, then took it for a drive, it was doing fine but then I would push the accelerator and the truck wanted to died and it did. So I changed the camshaft sensor and cleaned the crank sensor. The truck will crank but will not start.

My car has 450000 miles.
My car has an automatic transmission.

Check the exhaust system for any leaks before the oxygen sensors. This can contribute to having more oxygen in the exhaust stream causing the sensors to register a false reading. If there is no leaks in the exhaust, then check the engine for any vacuum leaks. Look at all of the vacuum lines, the intake gaskets, and the brake booster. A vacuum leak will cause the engine idle to accelerate fast and also cause the engine to stall when the computer brings the idle down. If you need further assistance with your engine stalling, then seek out a professional, such as one from Your Mechanic, to help you.

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. My truck won't start. I put a new fuel pump, cam shaft sensor, cleaned my crank sensor, and put a new battery in it. It will crank but 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: Transmission will not go into gear when warmed up

Hello. From what you describe it would appear that your vehicle may be experiencing some sort of potentially serious transmission issue. If the transmission was having issues prior to mixing in the additive it may be possible that doing so...

Q: O2 sensor relocation

Hi there. You are 100 percent correct about changing the location of the O2 sensor and it's negative impact on the ECU's ability to adjust on the fly to changing conditions. This is why I never recommend changing the location...

Q: Hello, my car has no spark, no controlled ground for the fuel pump, and no injector pulse. Fuse link close to the battery and relays are good.

Hello and thank you for contacting YourMechanic. The ECU is under your passenger's side seat. You can gain access to it by simply sliding the seat all the way forward and removing the plastic cover from the ECU. You can...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.