Skip the auto shop - Our mechanics make house calls

Q: No spark condition due to icm wire

asked by on

I rebuilt engine replaced crank sensor, coil ,ignition control module, and pcm and all the wiring and can't get continuity in my icm wire (icm to pcm wire) head scratcher

My car has 1000000 miles.
My car has an automatic transmission.

A: Hello. If this occurred right after rebuild...

Hello. If this occurred right after rebuilding the engine then it may be a defective control module or a pinched wire. It can also be the PCM. I always test the wiring first. If there is not continuity in the wire, then that break in the wire needs to be found. If the wiring is fine, then I have the ignition model and pick up coil tested. Also, keep in mind that if the distributor is not positioned right, then the computer will not fire in the ignition. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the electric system and advise on what needs to be done.

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: I lost my key to my Pontiac Grand Prix 2003. It will start without the key, but shuts off after 30 sec - is this because i don't have the key?

Hey there. Your vehicle is equipped with what GM calls their VATS system (vehicle anti-theft system). There is an electronic chip embedded in the ignition key and a "chip reader" that is part of the ignition switch. The reader looks...

Q: Car won't start after driving any distance. I have to let it cool down before I can start the engine again.

It's curious that you don't seem to have a code in the ECM. Usually if you have a malfunction that prevents the car from starting, there will be a code resulting. That being said, it sounds like you may have...

Q: Fuel Pressure

Hi There, It sounds like you may have a problem with maintaining fuel pressure and getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...