Q: Ok my car will not start it had the same issue a week ago I changed the cam and crank sensors. It cranks but wont start ...HELP!

asked by on

My 04 dodge neon will crank but not start the fuel pump is working I have sparks to all cylinders. This problem happened last week and I changed the cam and crank sensors. I just started working on cars and have a limited idea of cars please help me

My car has 157000 miles.
My car has an automatic transmission.

Prior to performing diagnostics be sure you have a fully charged battery that passes a load test. Then, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. To temporarily override the immobilizer system, see these instructions.


Be sure there is adequate fuel in the fuel tank and that the fuel is not old. Check for adequate fuel pressure, injector operation, and a spark at the spark plugs. Basically, if the starter motor is turning the engine over rapidly, at sufficient RPM, but the engine does not catch and run, that means that there is an ignition, fuel, air induction, or mechanical fault in the engine that will have to be repaired. Strictly speaking, you should first check engine compression in the cylinders because if there is no, or inadequate, compression the engine won’t run under any circumstances. If compression is found to be within factory specifications, and there is fresh fuel being delivered by the injectors (not just "to" the injectors) and the ignition system is working, that means that the air fuel ratio of the mixture delivered to the cylinders is so far off that the mixture just won’t ignite. Such could be due to a big vacuum leak, an air induction fault like a stuck idle air control valve or, considering fuel, could be due to a failed temperature sensor that must be working properly to signal the PCM to enrich the mixture on cold start. Other common faults are defective spark plugs or a defective coil. Regardless of the underlying cause, if you request a no start diagnostic the responding certified mechanic will get the problem diagnosed and repaired for you promptly. Please let us know if you have further concerns or questions as we are always here 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. Ok my car will not start it had the same issue a week ago I changed the cam and crank sensors. It cranks but wont start ...HELP!

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: How do I use my cell phone to dial a number in Uconnect?

When using Uconnect phone, you can say the number that you wish to dial. If you prefer, however, you can also punch in the number manually onto your cell phone. Simply write in the number on your phone and make...

Q: Q: Jumper cable hooked up wrong.

When reversing the jumper cables is the same as reversing the battery cables. It burns up the fuses, relays, electronic circuits and possibly the computer. If the fuses were replaced and everything in the car is working, then either the...

Q: Q: Car wont stay running

The first thing to check is for any broken or loose vacuum lines going to the intake manifold or the main inlet air tube from MAF to the intake throttle body. Any air leaks will cause this problem or if...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.