Q: No start issue: crank but no spark- replaced ignition coil

asked by on

hello yourmechanic, I have a starting problem with my old JETTA Mk3- it cranks but wont start. I checked for spark at the end of the sparkplug wire and i don't have spark, so i replaced ignition coil and i still have no spark. could it be the starter? or could it be the crankshaft sensor? thank you in advance for your feedback, regards, Bill
My car has a manual transmission.

The starter will not have any impact on the engine’s ability to produce spark. There are a number of issues that may cause an ignition system to not produce spark.

A bad crankshaft position (CKP) sensor (on engines that do not have a distributor), or broken, loose or corroded wires from the sensor to the PCM. A bad ignition module (on engines that have a distributor or use an ignition module separate from the PCM) A bad pickup inside the distributor (on engines that have a distributor), a stripped distributor drive gear (common problem with plastic distributor drive gears), broken, loose or corroded wires from the pickup to the ignition module or PCM. A bad ignition coil (on engines that have a distributor and a single coil) A bad rotor or distributor cap (cracks or carbon tracks that are allowing the spark to short to ground) A faulty ignition switch.

Any of the above issues may contribute to a lack of spark problem and should be looked at by a qualified mechanic such as one from YourMechanic. I would suggest having one of our professionals come to your location to diagnose and inspect your spark problem.

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. No start issue: crank but no spark- replaced 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: I bought an 2004 Audi A6 Quattro Sedan mode l3.0 v6 4 door for $1,000. The owner said he think it's the transmission and battery.

If gasoline was left in the fuel tank for more than 3-6 months, the tank would have to be thoroughly drained. Old gas will NOT start an engine. The fuel filter should be replaced as well. If the car has...

Q: Plug from camshaft position sensor corroded.

Even though you can get the car to start and run by sticking the wires into the connector, it will not keep out moisture and it could corrode even more. I would recommend having a mechanic inspect the sensor and...

Q: My 2008 VW Touareg v8 4.2FSI is leaking oil on top of engine and running down the front of engine.

Hello. The most common leak on the front of this engine is the valve cover gaskets. They tend to leak and cause this to occur. Most of the time the engine will need to be cleaned in order to locate...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...