I recently bought a 2005 sportsman 700 efi twin did not run has 22 hrs on it. Replaced fuel pump with E8198,new ngk plugs now it will run for approx. 5 min.rpms drop to 850-980 will hardly move.I can turn key off , start it it will run fine for 2 min then exact same thing.fuel pressure also drops from 39psi to 20psi.Need help badly.Thank you.

 

vent lines are clear and not pinched?

 

Yes,vent line is clear.I also visually checked t-bap wires.

 

Did you change the fuel filter?

 

Yes,new fram filter from kragen.Are the aftermarket fuel pumps reliable,or is there other known problems with 700 efi.

 

Idk? Maybe the fuel injectors or fuel rail are clogged?

 

when you turn the key on you should hear the pump prime the system. i'm assuming you checked the fuse? havent heard anybody really complain about using the after market pumps since the tank/pump replacement is very expensive. good luck w/ it.

 

I am trying to run fuel ingector cleaner through it,takes a long time stopping every couple of minutes.I can hear the fuel pump prime every time.Have not got any engine codes.

 

I think my fourwheeler is doing the same thing as yours. Mine might run for 7 or 8 miles then start cutting out and not takeing fuel popping and carrying on then i can let it set for 5 to 10 min and then it runs fine. Might run the rest of day or like yesterday mess up again in a few min. Just repaced the fuel filter and i checked my fuel pressure when it was running good and i had 39 pounds. Im going to take fuel pump out of tank and see if it has a sock filter on it. Please let me know if you fix your problem

 

2004 700 efi shop manual says 39 psi +- 3 maybe you got a bad fuel pump