GM Forum, I'm seeking what steps need to be taken to bring the spark back into my car? +200k on a 2000 grand prix gt L36 coupe. Started stalling which led to slow starts now at no start . Engine turns , plenty of fuel with pressure. New Acdelco 41-101. New ICM. All that is now. Some history is Car always ran smooth strong and steady. Even though after its next to last stall about 3-4eeeks I pulled 3 AP606 plugs from rad side of motor gapped .090, and 3 AC 41-921 from firewall side gap .09-.10 (with bridging), way over.10too maybe .120 with electrode tip intact but arc bridging removed.with new plugs it started right up and final stall to date about 4 minutes after start. About a week later, last week confirmed dead ICM,(when, why? idk!) But a brand new, tested b4 install now in. No spark to any plugs and get any off of the coil. does engine run smooth rule out crank sensor, MAF, or coil packs? Does this point to Ign switch as guilty? I never activated security. Dont have fob or remote lock. Can the key transponder burn out? I only have one. Or what am I not doing right ? There it is. Please, when I check back here tomorrow give me something I can use to be driving through the drive-thru tomorrow not having to hope our dinners ready before the car stops. I'll repost results of any attempted ideas. Call me Guinea because something has to work! Thank you 🐾🐾

How about some actual numbers. What is the fuel pressure?
How did you confirm ICM was bad? Even with a scope it is a crap shoot at times. What did the connectors look like? Nice and clean?
Does the anti-theft light come on at KOEO? Does it go out after a few seconds?

Let'* just say it is what it is. I felt this post was long enough without having to ad implied info such as the old and new ICM was tested at parts store. After finding complete no spark as a opposed to partial or weak spark which would be indicative of a different path of troubleshooting. See, too lengthy with unusable detail. I'm sure some readings would not have showed good due to the condition of the spark plugs but I don't have those details. But takeoff good, acceleration good, hiway city, 24mpg combined(and I have a heavy foot), even after stalling began, don't show signs of needing diagnostic testing. See again TMI. I hope that answers your question. If information is intended to further troubleshooting, please be specific so I may supply the information necessary as best as possible.Thank you

carfixer007: regarding the dash mount security light. With key in off position only opening driver door(did not check passenger door or trunk or hood) causes stock security light to flash continuously. Until key is switched to on or acc with door open. Or shutting door will stop it from flashing. I have not used any security with vehicle, have not had problems related to it, only recently changed components (ICM) that are involved with programming. AKA I have limited to no knowledge in this area. Thank you

Gimme fuel, gimme fire? Sounds like a Metallica song.

The last song I heard before posting my question was Metallica'* Fuel via car fm audio. Seemed an appropriate and related forum title! although I know I'm not getting fire to spark plugs, is my car trying to tell me something more than I'm thinking, what could get it to fire up? Now here'* a question If I've wore the battery down with a few drain and recharge cycles recently is it possible that engine will crank but battery not strong enough to supply proper voltage to fuel the spark to start the car? I had easy over ½ hr of crank no start time about 2 months ago, now over 5 mins total crank time and I'm recharging battery, If I leave some charge in it, same volts are there tomorrow. So yeah, Metallica~Fuel from reload released 97? Pontiac released 2000! So, quench my thirst with gasoline=fuel, fire, desire? A friend has a good battery not in use, I should know in a day or two. Unless someone knows a way to hook a top mount battery into a side mount car without another trip to the parts store?

You should monitor the battery voltage while cranking the engine. The volts should not drop below 10.5 Volts. If the voltage drops below that level it may not be high enough to fire up the computer system which is needed for a proper start.

Thank you autofixer007. I've been acquiring some understanding of voltage requirements but did not have any specifics. I'll crank it over tomorrow and watch for the 10.5 mark. I have a battery(not new) that'* been working in a 35 yr old Ford van (750cca)(GP 600cca) to follow-up the 10.5 test. I need to introduce another, difficult to simplify, scenario. Alot of this I'm learning. Crank sensor needs run to throw a code through. No start mode was here b4 kw850 scanner. No scans have been performed in run mode. Tool showed p0650(mil circuit) and mil on. Replaced burnt out mil warning bulb with new bulb. Also new plugs and ICM. Created 4min idle to stall. Mil working correctly, off after car started. I cleared codes, stupidly, trying to regain start. Tool now reads mil off but has not encountered run mode since codes cleared. My brain employs 2 new thoughts, run needed for bad crank sensor to show and bad sensor doesn't always cause noticeably bad performance. New crank sensor should be here in two days. I can't hide this project from apt maintenance, if I go that far into a repair they need to see car move or at least not see me working on it more so after that. I will appreciate any feedback on my, mostly newly acquired thoughts, positive/negative before I proceed in unnecessary directions. What is any opinion of if it seems a sensible path of actions or is my brain overflowing with futile inclinations? It'* times like this I REALLY miss cars like my 6.6 LJ Grand Prix, but none the less thankful for my 00 L36 GP GT! 🏎️ Thank you 🐾🐾 i will be back..(I really need to learn some major summarizational skills_soon!)

And a BIG THANK YOU to the moderator that has to proofread all the posts including all of my long-winded perceptualizations*,

It stalls at idle sometimes, right?

How many miles are on it? There are a lot of numbers that are higher than 200,000.

What is the fuel pressure?

What part of the world does it live in?

Have you checked the IAC?