Q: Crank no start. Not switching signals at the ignition coil.

asked by on

Hi I have been trying to diagnose an issue with a crank no start on a 2005 Mazda 6 2.3L. What I've done so far is replace the crank shaft sensor the fuel pump as it was week. tested the camshaft sensor and tested the ignition coil. I tested the singles going from the crankshaft sensor to the coil and it seems that there is a single going to the ignition coil however I'm not getting a switching signal and No spark at any of the spark plugs. So the crankshaft sensor is new.. This all started with a P0300 Random misfire and P0134 HO25-11 code oxygen sensor issue the vehicle is running rough I friend of mine actually pulled a spark plug wire off while the engine was running as he was trying to identify which cylinder was running rough and the engine died from that point I could never start the vehicle again.
My car has a manual transmission.

Hi there. When your friend removed the spark plug while the engine was running and it was not grounded, the lazy spark may have shorted out the module in the distributor or it could have shorted out the coil in the distributor. I recommend replacing the distributor coil and module and the engine should start back up. Then you could test to see where the problems are with the random misfire. I also recommend replacing all the spark plugs to ensure a good solid spark. When you replace the parts, I suggest investing in the OEM specified parts to ensure a good connection and performance. If you need further assistance with your engine misfiring, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Crank no start. Not switching signals at the ignition coil.

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: Car won't start.

Hello. The key you put in the ignition is a code key and may be defective. Try a different key if you have one. If this works, then you need to get extra keys made. If it still does the...

Q: Is it any way to use a rear strut wit a different mount fixture

It is unlikely that this will work. It is possible that it'll work if the spring diameter and the mount diameter or the same however I would strongly recommend using the original OEM equipment parts on your vehicle.

Q: I replaced the filler neck on a 2010 tribute. (Cap less system) but the check fill neck light is still on the dash. There is no op

Hi Andrew. In most cases, when this warning light is initially illuminated, it will need to be removed from the ECU manually by a professional mechanic completing a warning light inspection first. This is likely the reason why the light...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.