Trouble on 502 mpi engine , help wanted !
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Trouble on 502 mpi engine , help wanted !
Hi , This moring I was sailing out of the harbor , arriving at sea I reved the engines and after cruising at 40 mp/h , abouth 1 or 2 minutes later , the starboard engine lost its power . When in neutral it would reve to 4.500 rpm , but I could hear that not all cilinders were workong , it sounded like a 4 cilinder.
Then i tried runninn a few minutes at 2.500 RPM on the other engine en opening the trottle a little more in the starboard engine , hoping it was only some dirty sparkplugs ?? but after 10 min. i gave up, it wouldend reven over 1200 rpm when in forward. So i checked the ecu for any DTC's (I have a small one with flashing led) and it showed code "12" so this means , no codes in ecu.
Oil pressure at 1200 rpm was 40psi , oil temp = OK , engine temp = OK too.
So far I have changed th espark-plugs , new cables , new rotor , new distributor cap , new ignition module in distrubutor , new fuel filter .......
So please help.............................
Then i tried runninn a few minutes at 2.500 RPM on the other engine en opening the trottle a little more in the starboard engine , hoping it was only some dirty sparkplugs ?? but after 10 min. i gave up, it wouldend reven over 1200 rpm when in forward. So i checked the ecu for any DTC's (I have a small one with flashing led) and it showed code "12" so this means , no codes in ecu.
Oil pressure at 1200 rpm was 40psi , oil temp = OK , engine temp = OK too.
So far I have changed th espark-plugs , new cables , new rotor , new distributor cap , new ignition module in distrubutor , new fuel filter .......
So please help.............................
Last edited by douglas_be; 07-07-2008 at 01:17 PM.