Hello and This Has Me Chasing My Tail Like a Puppy.

[Ahso]

I'm new here so I wanted to start out by saying I am sooo glad I found this forum and I didn't even know it existed till yesterday🙂...

ok, try this.. real poser..ha ha ha.. checked coil emits spark to plugs and pulse to injectors - acts like it wants to start, pulse and sparks 1 time when u turn key to crank engine and one time when u release key.. unplugged crank and cam sensors and turn key to on position, check with scanner and it reports (without engine running) 20RPM (reboot scanner and does not change)... it sets no codes to check out either... also changed Ignition module (IGM)... what am I missing on this as it will not start and how's that for a good one?....
3.8 ltr. engine

HAVE TRIED
1.) Replaced IGM (used IGM, presumed good, b4 buying new one)...
2.) Checked for codes with scanner (no codes set)...
3.)Checked for spark to plugs and pulse to injectors (good, but only sends 1 spark and pulse when engine starter is engaged and disengaged respectivly)...
4.) Checked with scanner while Crank Sensor and Cam sensor are unplugged - strangest thing, registers 20RPM with key on and engine not running while sensors are unplugged...
5.) Checked and getting fuel to injectors..
If anyone has any ideas plz help, I'm at an impasse.. I just want my buick to rock on once again... ty in advance.. Ahso...

 

[HotZ28]

It is always best to post the year of your car, so we know what engine we are talking about. In addition, please describe what took place before the no start condition occurred. Were you driving the car and the engine stalled and would not restart, or did the no start occur with a cold engine? Replacing parts without proper troubleshooting, can be an expensive process of elimination.