No Pulse to injectors

Hello,

This sounds like you have an ignition module or ECM that has gone partially out. Here is the engine and ECM wiring diagrams so you can see how the system works. Use this guide to check the connections/signals and then replace the ECM if everything checks out:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find.

Good to hear, please use 2CarPros anytime we are here to help.

Cheers

Hello,

It sounds like you may have water inside the distributor which when hot makes steam and causes the engine not to start, here are the engine wiring diagrams so you can see how the system works. Check the fuses as well in the diagrams. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

That depends on the car maker. Thanks for letting us know your issue is resolved.

Hello,

It sounds like you have high resistance in one of the injector wires. Here is a guide so you can do some simple tests and check:

https://www.2carpros.com/articles/how-to-check-wiring

Here are the wiring diagrams so you can get started (below):

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken

Good morning.

Were the old ones leaking prior to the replacement?

I would check the throttle body where the injectors mount and be sure there are no remnants of the old o-ring from the old injector.

Are you using lubricant on the o-ring prior to installation?

Roy

INSTALLATION:

1. Lubricate new lower (small) o-rings with automatic transmission fluid and push on nozzle end of injector until it presses against injector fuel filter.
2. Install steel injector back up washer in counterbore of fuel meter body.
3. Lubricate new upper (large) o-rings with automatic transmission fluid and install directly over the back up washer. Be sure the o-ring is seated properly and is flush with top of fuel meter body surface.
Note: Backup washers and o-rings must be installed before injectors, or improper seating of large o-rings could cause fuel to leak.
4. Install injector, aligning raised lug on each injector base with notch in fuel meter body cavity. Push down on injector until it is fully seated in the fuel meter body. (Electrical terminals of the injector should be parallel with throttle shaft).
5. Install fuel meter cover gasket.
6. Install fuel meter cover.
7. Reconnect electrical connectors to fuel injectors.
8. With engine "off" and ignition "on", check for fuel leaks.

Give that a try before replacing the throttle body unit.

Roy

Not causing an external fuel leak.

Disconnect the electrical connectors and turn the key on and see if it leaks. I am assuming it is where it mounts but if it is dripping from where the injector fires, then yes.

Roy

If you traced the wiring to the ECM and there is power there and not at the injector, there has to be a break in the wiring. Have you checked for continunity?

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.