Skip the auto shop - Our mechanics make house calls

Q: No start

asked by on

when driving my truck died like someone shut it off . I've had no spark so I replaced the pickup coil, control module, and ignition coil . and now when I checked my coil out at the coil wire with a screw driver to a ground to see if I was getting spark it sparks 1 time spark and then no spark after . I checked all my wiring and its all good. Would you have any idea what it might be. Any advice would be greatly appreciated. Thanks in advance
My car has an automatic transmission.

You need to check for battery voltage on the red wire to the coil with the key in the on position and then check the same wire when you go to the crank position. If either one is not as specified then ignition switch is at fault. Now check the the other wire dark green and yellow striped wire on the coil. You should use a test light to see if this wire blinks when you crank the vehicle. If it does not blink, the the TFI module pigtail wire for timing should be disconnected to see if you now can start the motor. If this doesn’t work then you have most likely a bad TFI module or distributor stator in the distributor itself. But, with distributor cap off, make sure distributor rotor is turning or not. If not, check timing chain or distributor gear. The most common problem will be that the TFI module is bad. If you’d like some help wit these checks, consider YourMechanic, as a certified technician can diagnose your starting issue and help you fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: Occasionally will not start

I am assuming when you say it won't start in this case, the motor will not turn. It's an important distinction to make. Is it a "Crank no start", or is it a "No crank". With the crank no start,...

Q: Transmission issues

Hello, thank you for writing in. There can be many reasons more this issue. The vehicle would have to be inspected to determine the cause. This possibly could be a mechanical failure internally with transmission. It would require some special...

Q: new distrbutor and module still stalls at red lights could the ecm be going bad

It certainly sounds like you are on the right track. I would recommend replacing the ECM to determine if it resolves the issue. I would also recommend checking the circuitry near this computer to be sure that no wiring problems...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.