motor troubles with four winns

[PeteyB]

just did a tune up on 2002 268 vista four winns volvo penta 4.3 gl with 5.7 MPI Voltec engine. Ran great. Perfect. 2 days later go for another run and perfect. After that, the gas vapor detector alarm on the dash went off as well as the carbon monoxide sensor in the cabin. Aired out and ran blower seemed to solve issue. Then went for a ride and stalled, misfirred and would not pick up speed. Came in and the Vapor detector would not stop going off. Had to shut down the entire system, ship systems on off dial and switch above it on off. Only power was electrical outlets. At a complete loss. Any suggestions.

 

[Bondo]

Re: motor troubles with four winns

just did a tune up on 2002 268 vista four winns volvo penta 4.3 gl with 5.7 MPI Voltec engine. Ran great. Perfect. 2 days later go for another run and perfect. After that, the gas vapor detector alarm on the dash went off as well as the carbon monoxide sensor in the cabin. Aired out and ran blower seemed to solve issue. Then went for a ride and stalled, misfirred and would not pick up speed. Came in and the Vapor detector would not stop going off. Had to shut down the entire system, ship systems on off dial and switch above it on off. Only power was electrical outlets. At a complete loss. Any suggestions.

Ayuh,.... Welcome Aboard,.... Did ya check 'round the engine room for Problems,..??

 

[Technologic80]

Re: motor troubles with four winns

just did a tune up on 2002 268 vista four winns volvo penta 4.3 gl with 5.7 MPI Voltec engine.

LOL. First off, the "voltec" is the hybrid power system that goes in the Chevy Volt. No Four Winns has this powertrain. Volvo Penta does certainly use Chevy Vortec engines though in their line up however.

A 4.3GL is a carbureted 4.3 liter Chevy v-6.

A 5.7MPI is a Multi Point Fuel Injected Chevy v-8.

What exactly do you have? None of that makes any sense. Big differences in the fuel delivery systems not to mention 2 addt'l cylinders!

 

[PeteyB]

Re: motor troubles with four winns #3

Re: motor troubles with four winns #3

LOL. First off, the "voltec" is the hybrid power system that goes in the Chevy Volt. No Four Winns has this powertrain. Volvo Penta does certainly use Chevy Vortec engines though in their line up however.

A 4.3GL is a carbureted 4.3 liter Chevy v-6.

A 5.7MPI is a Multi Point Fuel Injected Chevy v-8.

What exactly do you have? None of that makes any sense. Big differences in the fuel delivery systems not to mention 2 addt'l cylinders!

Your absolutely correct sorry....5.7MPI chevy v-8.....with an EFI tuned up motor, no pickup before tune up, felt like boat was real heavy. After tuning it up ran like brand new,,,,went out for 2 days. While at the docks..at night the gas vapor sensor alarm went off. Shut down ships systems. went to bed ...woke up no beaping or red lights....went for a ride and it was back to running like it was before we tuned it up. Could it possibly be a collapsed fuel line?

 

[bnicov]

Re: motor troubles with four winns #3

Re: motor troubles with four winns #3

Could the fuel tank have been overfilled and some gas went in the bilge?? BTW, it's a 5.7 MPI VORTECH engine.

 

[Technologic80]

Re: motor troubles with four winns #3

Re: motor troubles with four winns #3

BTW, it's a 5.7 MPI VORTECH engine.

Drop the H.
http://www.michiganmotorz.com/vortec-crusader-powerpack-marine-engine-p-796.html

As far as the vapor detector, I have one as well in my 97 Four Winns 278 Vista. When one of my engines was running very rich because of problems I was having, it would also set the fume sniffer alarm off. Once I corrected the rich condition, it hasnt done it since. Bottom line is you likely have an engine running too rich for whatever reason - and it could be many different things.

I think you need to start at basics here. Fuel, spark, air. Test the fuel pressures at the schrader valve. Should be at least 50psi. You said you did a tune up. Verify correct firing order again. Double check your steps - is the distributor cap on right, are all of the boots pushed on fully, etc etc. After all of that is verified you are going to want to OHM out your engine temperature sensor - the one that is screwed into the thermostat housing. It feeds the ECM the engine temperature. If the sensor went bad, the boat will barely run and run extremely rich at that. Verify the wiring harness is on and clean. Mine went bad and thats when my vapor detector would sound. I ran all over heck and back throwing parts at the engine until I finally OHM'ed out the sensor - it was dead. $20 at Advance Auto Parts and I was back in biz

Good news is on a 2002 marine engine, you are still a MEFI system that you can use an LED bulb and a paperclip to get the 'codes',if any, are stored on the ECM. Heres an OUTSTANDING step by step that has helped me and saved me hundreds (maybe even thousands) of bucks: http://bit.ly/Srt4tC

 

[PeteyB]

Re: motor troubles with four winns #3

Re: motor troubles with four winns #3

Drop the H.
http://www.michiganmotorz.com/vortec-crusader-powerpack-marine-engine-p-796.html

As far as the vapor detector, I have one as well in my 97 Four Winns 278 Vista. When one of my engines was running very rich because of problems I was having, it would also set the fume sniffer alarm off. Once I corrected the rich condition, it hasnt done it since. Bottom line is you likely have an engine running too rich for whatever reason - and it could be many different things.

I think you need to start at basics here. Fuel, spark, air. Test the fuel pressures at the schrader valve. Should be at least 50psi. You said you did a tune up. Verify correct firing order again. Double check your steps - is the distributor cap on right, are all of the boots pushed on fully, etc etc. After all of that is verified you are going to want to OHM out your engine temperature sensor - the one that is screwed into the thermostat housing. It feeds the ECM the engine temperature. If the sensor went bad, the boat will barely run and run extremely rich at that. Verify the wiring harness is on and clean. Mine went bad and thats when my vapor detector would sound. I ran all over heck and back throwing parts at the engine until I finally OHM'ed out the sensor - it was dead. $20 at Advance Auto Parts and I was back in biz

Good news is on a 2002 marine engine, you are still a MEFI system that you can use an LED bulb and a paperclip to get the 'codes',if any, are stored on the ECM. Heres an OUTSTANDING step by step that has helped me and saved me hundreds (maybe even thousands) of bucks: http://bit.ly/Srt4tC

thank you ....great info..