tdpb2008

Ran the boat today made a couple laps at WOT, headed back and it hiccuped so I backed out of the throttle then started running like s*** after putting a new cap and rotor and a coil still running the same

After some trouble shooting 2 cylinders are down on th port and starboard side

Port side cylinders 1 and 7 are down
Starboard side cylinders 4 and 6 are down

Any ideas? I'm thinking a distributor but not sure

sutphen 30

sound like an injector wire feed from ecu went bad.

tdpb2008

So is that the injector harness that runs cylinders 1746?

sutphen 30

sounds like it.there are 2 driver circuits from the ecu.also check the 12v feed to them also.

tdpb2008

Ok will do

tdpb2008

How would I test these? And where

sutphen 30

at the injector w/ a noid light.

Randy Nielsen

iTrader: (4)

I am looking at my wiring harness for another problem but you might check your grounds. There are 3 grounds on the injection harness alone. Randy

tdpb2008

It's weird it was running great then it hiccuped and has run on 4 cylinders...they just all of a sudden go?

tdpb2008

I just checked the spark and it does have spark on all cylinders