Q: Car has erratic cranking but won't start. Has spark n can hear the fuel pump n no cel is on

asked by on

Car cranks erratic but won't start. Has spark n fuel but there is no cel light on
My car has an automatic transmission.

If by "erratic" you mean the starter motor is not working properly, that fault should be resolved first. There could be a starter motor or starter circuit fault. If the starter is working properly, and thus the engine cranks at adequate RPM, 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. Check for vacuum leaks, an air induction fault like a stuck idle air control valve or, considering fuel, check for a failed temperature sensor that must be working properly to signal the PCM to enrich the mixture on cold start. Other possible no start faults are low compression, defective spark plugs, a defective coil(s), a failed crankshaft or camshaft position sensor, a failed throttle position sensor, and a broken timing belt/chain. 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. Car has erratic cranking but won't start. Has spark n can hear the fuel pump n no cel is on

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: mysterious oil disappearance

Hello. It sounds like your engine may be consuming oil. Blue smoke is usually the result of engine oil being burned in the combustion chamber. It may be possible that the piston rings or valve stem seals have begun to...

Q: What's going on when gas is constantly slowly leaking from where the gas cap is and the cap was not under pressure when opening?

It is possible the tank was filled too much, that is the gas pump did not shut down when it should. Even if gasoline was not filled right to the top, thermal expansion can later cause the gas to overflow...

Q: Truck will act like it is not getting enough fuel when cruisng. RPMs drop then comes back up or under load

Hello. I think you have called it, this is almost certainly a fuel supply issue. Installing a fuel pump pressure gauge which can be observed while driving will confirm this. Sources could include a worn out fuel pump, a fuel...

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...
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...
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...