2000 bonneville problem
 

My wife posted on here a few days ago about our 2000 Bonneville.It starts but then either runs ruff, idling up and down and has no power or just starts and shuts off right away. Occasionally for a minute it will start and act normal. I have pulled the maf and it does not help. I put a new fuel filter on. I put another fuel pump in, not a new one I got it at the wrecking yard.On the other post a guy said something about swicthing some fuses around which I tried but nothing seems to be working. I also scanned it and it didn't show anything wrong. Help? Gary

Which thread did she start. I'd suggest that you update that one so we know what has already been covered, and we'll go from there. Thanks.