he said he swapped wires, but going back through dont see where you swapped coils?

Shame on me for not noticing.

Swapped the coils also. Same problem. Cleaned the ICM. Same problem. New plug in #3.

Part that is difficult for me to understand is does not set a code when it doesn't start.

Diagnostics won't start until the PCM sees the engine running for X seconds/minutes before it starts testing.

check fuel pressure, swap injectors?

I have the exact same problem on my 2000 Bonneville po171 and po306 sometimes po171 and other times just two po306 codes so I'm watching this thread for answers....

I put some heet in my tank and seems to have done the job...

Check the iac sensor ....

Guys,

I found it. It was the fuel pump. I put in a new Delphi and a strainer about 1.5 weeks ago and everything seems is running fine.

I thought I had enough fuel pressure because I was getting soaked when I checked manually. When I put a loaner gauge on from Autozone on it I only had 35 lbs. Specs say 48-55lbs.

Along the way I have cleaned the ICM, IAC, throttle body, EGR valve, TPS. I have replaced MAF, O2 sensor, EGR valve gasket, throttle body mounting gasket and #3 injector. I checked for vacuum leaks.

Shows me that you always need the right tool for the job!!!

Many thanks to all for the help,

John

I think you owe Justin a prop. He nailed this one.