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 February 16, 2017

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

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

Car won't start but cranks over gas gauge is broke

Hello, thank you for writing in. All signs thus far point to the fuel pump going out. You can test the available power to the fuel pump to ensure the pump is being supplied with the proper voltage. You can...

Car wont turn over.

Be sure the battery is fully charged. "New" batteries are not necessarily fully charged at time of sale. Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. Basically, with the...

Why is my starter not cranking the engine in my 2004 Mitsubishi Ecplise

Hello. It sounds like you have bad positive battery cable. When the cable fails it creates a lot of internal resistance that will cause this. I would usually do a voltage drop test of positive cable to verify this. It...

Related articles

How Does the Carburetor Work Within the Fuel System?
The carburetor is responsible for mixing gasoline and air together in just the right amounts and getting that mixture into the cylinders. Though they...
Symptoms of a Bad or Failing Ignition Trigger
If your car is hard to start, not starting at all, or its Check Engine Light comes on, you may need to replace the ignition trigger.
The Best Used Cars to Buy If You're a Dog Trainer
If If you are a dog trainer, you expect a lot from your vehicle. You want a ride that is safe, roomy, and of course, dog friendly, since your training operation will often mean that you need to transport the...