Q: Car is cranking but not firing up to start

asked by on

Car has new plugs and optispark still won't turn over causing the battery to drain when trying to start and over heating wires where the ground is melting loud popping noise and sputtering

My car has 100000 miles.
My car has an automatic transmission.

The car not starting will first require a good strong battery to do diagnosis on this condition. I would first go through some preliminary checks. First, would be to check for spark at the spark plugs. If you have spark then I would check the fuel pressure to be above 40 psi. On this car, if you have spark and fuel, then you will need to see if you have a fuel injection signal to open the injectors.

If you have all three of these then you have an internal timing problem with the camshaft timing. If you have no injection signal then you would need to diagnose the computer to see why it is not signaling the injectors to open. I recommend having a thorough diagnostic check of your starting issue by an experienced mechanic to determine what is exactly causing the problem.

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 is cranking but not firing up to 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: Key and steering wheel have to be moved to start the car

Hello there, thanks for writing in about your 2002 Mercedes-Benz CLK430. There are many possible causes for this fault. The most common would be a failing key cylinder, steering wheel lock, or ignition switch. I recommend having a qualified technician,...

Q: Rebuilt 350 engine rebuilt Quadrajet carburetor with new computer. Nothing will connect to the computer, which is effecting my transmission.

Hi there. Check the wiring to the carburetor and see if the choke is coming on or staying off. The computer controlled carburetors are designed to meter the choke and fuel jets. If the wiring to the carburetor has power...

Q: My car dies or has no power when I put into gear

Hi There, It sounds like you may have a faulty throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...