1998 Suzuki DF70 shutting down at speed

[iamsaws]

I have an incredibly frustrating issue and hoping someone has experienced the same.

Motor will start and run fine, get it to running rpms 5000+ will go and will randomly shutdown. ( I went 9 miles before it did it yesterday.) Sometime buck, sometimes shuts down. have been able to get it restarted, but that ends the day usually. It has done it pretty consistently.

I changed the main fuel pump, MAP sensor, ran on aux tank. A member had mentioned he had an issue similar and had clogged/dirty injectors. I guess thats my next thing to try. I dont get any warning beeps or idiot lights. I am open to any suggestions

 

[iamsaws]

1998 Suzuki df70 dying out at speedl

I have a 1998 DF70 starts and idles perfectly, cool pisser. The issue I have is it will just randomly die out while at speed/upper RPMS. Some days I can run it under 500 RPM and I can use it as much as I want no issues. My last run I did 9 miles of a 10 mile trip and it just died. It will usually restart. Sometimes right away, sometimes it takes a bit. I changed the primary fuel pump, my boat guy feels its electrical and not fuel. I have ran on a different tank with non ethanol fuel only.

Sometimes it bucks and sometimes it will just die. Is there a way to reset the ECM? Temp sensor? IAC valve? Any ideas would be appreciated.

thanks!

 

[GA_Boater]

Your two threads have been merged.

Please do not start multiple threads on the same issue. Simply add posts to the original thread.

 

[99yam40]

monitor the fuel pressures to see what they are doing when problem shows up

 

[iamsaws]

Thanks 99yam40 how would I do that?
thanks!

 

[99yam40]

not sure on a Suzuki, but i am sure a pressure gauge and vacuum gauge for the pick up pumps and pressure on rail pressure if it is a fuel injected