Dreaded Ignition Noise!!!!!

[bl200sx]

Hi, well installed used Pioneer 880 head, got the Dreaded Ignition Noise!!!!
This Pioneer 880 has replaced my Alpine 9831 that didn't have ignition noise, everything seems to be the same, except for the new Pioneer 880 head unit, what should I do to get rid of this crappy ignition noise, I can't stand, it sucksss!!!!!!!!!!!!!:confused:

[Papi.Chulo333]

I too have a Pioneer deck.. the P5900IB (or somethin' like that). One day while driving I jerked my car getting into gear and heard a God awful pop/thump and the worst engine noise I have ever heard in my life. I had to do a temporary ground from stereo chassis to one of the RCA output's "negatives". It "cured" the noise but the latent failure will have it's problems.... now it causes a fault back at the amp when RCA's are connected. Three out of 3 Pioneer decks have done this, brand new and perfect at first... then they do the engine noise/popping. I suspect the factory wiring and bad grounding using factory wiring.