No spark at spark plug?

If the computer don't give the ignitor the Igt signal it will not fire, also if the ignitor don't give the computer the Igf signal which is the spark confirmation-the computer won't know combustion has taken place-we stop here and check the ignitor, ECM.

Do you have power at the positive terminal coil, when key is in On position?

Here's some more about Ne and G signal:

The Ne and G signals-the ECM has to see these signals in order for it to issue an igt signal to fire the ignitor and the ignitor in turn gives the ECM the igf signal that combustion has occur and the process repeats all over.

Ne/G1-2/Igt/Igf are all at the ECM try checking it all. Or swap the ignitor. BTW do you hear the injector clicking while engine being crank over.

Do you have power at the positive terminal of the coil-check your ignition and EFI fuse

The NSS has nothing to do with the ignition operation ( No Spark ) unless the engine refuses to turn over then we can blame the NSS.

It may sound stupid but its not-where are you looking for spark at the sparkplug wire end or at the coil.

Again tell me if you have power at the coil-the shop might be right on a new distibutor-due to the crank angle sensor in it.

Yeap! Been there before-the same goes in GM HEI Modules.

The ECM tells the ignitor to fire the coil at which time it surges to the spark plugs for combustion

Posted at Sat Sep 01, 2007 4:44 am
By numbersguy58, New to the forum
Give Feedback | Votes: 0

So what do you recommend I do now? The "not starting when engine is too hot" happened again. I changed out the igniter but the engine still did not start - no click, no starter turn, nothing. Lights and radio worked fine though. While on the cell phone with AAA arranging a tow, I tried again (after about 20 minutes), engine started right up. When I got home I turned the engine off and then on again. The engine turned over like it was showroom new. I am so confused.

What else do I need to check? Is the starter itself bad? It is about 3 years old and was a rebuilt Bosch that I bought from Pep Boys.

Please help!

Start by checking all the fusible links in the power distribution box-could also be the ignition switch/NSS or clutch switch/starter relay.

You can get the starter to kick over if you short the battery terminal and solenoid at the starter-if it kicks over than backtrack to the starter relay/NSS/ignition switch.

It's the ignitor especially if this vehicle is equipped with a tachometer and the tach starts going hay wire when the problem occurs. $50 is nothing to repair cars these days. If it proves to be the problem you will save that money in one tow.

Good luck!

Good morning,

Can you hear the fuel pump run with the key on?

Did you check and see if the timing belt is broken? If it is, you will have this issue.

https://www.2carpros.com/articles/how-a-timing-belt-works

I would also do a compression test to verify the engine is not damaged internally.

https://www.2carpros.com/articles/how-to-test-engine-compression

Make sure all your fuses are good. Check with a test light for power on both sides with the key on.

Roy

Scan for codes and check to see if the duct work from MAF to engine is connected then check for wires disconnected.

Hello PGFASSBENDERPF,

I am sending you a link to an article that features written step by step instructions and pictures explaining how to do the scan yourself, also I have included a link to our YouTube channel with a how to video on code scanning.
This is applicable even if your check engine light is not on.
Most scanners are inexpensive to purchase, you can purchase one online from sites like Amazon.com

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

https://youtu.be/YV3TRZwer8k

Once you have the codes please get back to us so that we can further assist you. We are always happy to help.

Thank you for visiting 2CarPros.com.

All the best,
,
Renee
Admin

Also, check fuses and relays under hood like the PGM and main relay if you have those.