1994 ProStar 205 Indmar 275 EFI: Cranks but will not start
I have the 5.7L Indmar 275 with electronic fuel injection and it will turn over but will not start. The injectors are not spaying fuel and there isn't spark at the plugs. I have replaced the distributor cap and button, ignition control module, Ignition coil, and the two relays on the back of the engine. I have checked the kill switch with a meter and it is working. I have a spare ECU and tried replacing it but still no spark. The big red 50 amp breaker on the back of the engine isn't tripped either. The fuel pump is priming when the key is switched on and fuel is coming out of the fuel filter.
When this first began, there was weak a yellow spark at the plugs and sporadically spraying fuel (some times it would spay when trying to start, others it wouldn't). It then stopped spaying fuel at all, so i sprayed some ether into the throttle body and the boat started and began spaying fuel. (rough idle; stalled when i gave it gas, but restarted and ran). It ran for 10 minutes like that until it stalled and hasn't ran since.
Any help is appreciated
Have you checked the kill switch?
If you have spark should be a fuel delivery issue, how are you testing for spark? Anything recently worked on? Start there. Fuel pressure? Filter etc... If you have spark lanyard and ignition should be the same as when it was working. Gas?:confused:;)
If no spark and no fuel check neutral switch. Wiggle throttle in and out of neutral a few times. Lock in back position with pin pulled. The switch can cause all of these issues as well.
Check for proper operation of fuel pump relay-2 sec. on at power up
Check for contaminated fuel
Check fuel filters
Check fuel pressure
Check ignition voltage output
Check ECT for sensor value--4450 ohms at 60 deg.F---2796 ohms at 77 deg.F
Unplug ECT sensor and try starting
Unplug MAP sensor and try starting
The ecu will substitute a default value for these sensors as well as the TPS
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