While driving the engine started misfiring and shut off?

Hi,

Could you take a pic of the spark plugs and upload them for me to see? Also, if they were instantly covered in something black, it may be you have too much fuel pressure. Were all cylinders like this when you checked them?

Also, is the vehicle running at all at this point? If it isn't running, are you sure there is spark to the plugs? If you haven't checked, here is a link that explains how to check for spark:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

One other thought. If it isn't running, record it cranking and upload it for me to hear.

Let me know.

Joe

The plugs look like new, but they never should have turned black after such a short period. Have you checked the fuel pressure? It may be too high.

Let me know. Also, when it stalled the first time, before you replaced everything, did it restart or not?

Joe

Let's try something. If it still isn't starting, do this:

See if the engine will start if you use starting fluid. If it does and then stalls, we know it is a fuel-related issue. If there is no change, I need you to check for spark at the plugs.

Here is a link that explains how to check:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

As far as the fuel pressure is concerned, it is checked at the fuel filter. I attached the directions below for you.

Let me know.

Joe

See pics below.

Have you checked for spark? If not, try that. Also, when you are cranking the engine, see if the tachometer moves at all. If it doesn't, there is a chance the crankshaft position sensor has failed.

Let me know. Also, let me know if you have a live data scan tool. If you do, see if there is an RPM signal while the engine is cranking.

Take care,

Joe

Hi,

That is odd. If you have spark, you should have an RPM signal. The tachometer gets a signal from the ignition control module in the distributor. I attached directions below for testing it. Take a look at them and let me know if you feel comfortable performing them.

Next, I need you to record it cranking and upload it for me to hear.

Let me know.

Joe

See pics below.

If that is the case, it isn't getting fuel. You mentioned the pump was replaced and you have fuel pressure. So, that leaves a problem with the injectors.

I attached a pic below. Note that each fuel injector has a yellow wire with a black tracer. That is the power supply to the injector. Once you turn the key to the run position, each of those wires should have power. Using a test light, connect the alligator clip to the battery negative then probe the yellow/black wires to confirm the test lamp lights up, indicating power.

If they have power, we need to check if the ECM is providing a ground path to complete the circuit. The ground wires are brown, yellow, blue, and red. To check if there is a ground path, connect the alligator clip of a test light to the battery positive. And probe those wires one at a time while you have a helper crank the engine. When it is cranking, the test lamp should strobe on and off.

Try this and let me know what you find.

Joe

See pic below. I highlighted the ground path wires and circled the power wires.

Hi,

It could be spark related, fuel related, timing related, and so on. Is it possible for you to record the engine cranking and upload it for me to hear?

Let me know.

Joe

Hi,

Thanks for the video. I was thinking it was timing related, but it doesn't sound that way. It sounds normal.

I read back through everything. You indicated there is spark and when you use starting fluid, there is no change. That is odd. When you checked the spark, is it a hot blue snapping spark or does it appear orange or white in color?

Let me know.

Joe

Hi,

I attached the diagnostics for the ignition control module. Take a look through them and let me know if you are comfortable performing them.

Joe

See pics below.