I have 2004 indmar tbi 350
yesterday it started running poorly it happened suddenly just cruising at around 2500 rpm.
1.It won't start unless I give it a lot of gas, and it will barely idle around 500
2.Blowing lots of smoke while doing it
3. when it is idling it is quite rough and on the verge of dying.
4. All 8 plugs were wet black and sooty
What I have done.
30 psi fuel pressure but it bleeds off as soon as I turn key off, not sure if it should keep the pressure for a few minutes
Injectors are spraying a normal spray.
replaced the ignition control module, even tested it, but that didn't help
tried a different map sensor, nothing..
New plugs, wires and cap/rotor are all fairly new and look fine.
I haven't done a compression test mostly because all 8 cylinders looked identical.
There is no odd noise except for the engine sounding like it has a giant vacuum leak.
Any thoughts and Ideas would be great.
should fuel pressure bleed off that quickly with the tbi?
thanks
Todd