Hey all, I have a 84z 305 L69 CCC and I’m getting a code 41. Upon start up the engine light stays on for a few seconds and then goes off and doesn’t come back on. But if you check codes it’s saying 41. Car runs and drives but idle is fluctuating a bit and when I open throttle it seems to have a hard time accelerating, not horrible but I can tell it’s not fine like a small stumble in power. Any ideas?

 

No distributor reference pulse at ECM when within a certain manifold vacuum range. There are troubleshooting charts posted in this thread:

https://www.thirdgen.org/forums/tech...de-41-lg4.html

RBob.