I have a 2002 f4i 600. Bike always rode fine never had a problem. Don’t have pics of anything right now but can get some when asked.

Rode it put put fuel in it bike would start getting like a stall to it like it would die and then come back to normal it would do that every gear low rpms high rpms kinda like it was out of gas but it wasn’t for sure. Get home one of the wires that go into the clip for the ecu the pink wire controls fuel pump and whatever else. Fixed the wire and assumin that was the only problem. So got the fuel pump to come on and primes and what not. Before all that wire thing got fixed bike obviously wouldn’t start so now the bike starts and what not.

However, the problem now is the vacuum lines injectors something is wrong with it i don’t know if it’s the wire I fixed for the plug that connects to the ecu/ecm whatever it’s called but the bike idle maybe 4K 5k when cold then stays that way even when it’s warmed up I took the idle adjuster **** completely out and it still does it so it’s not that.

I messed with the vacuum lines a little to make sure they were all going where they are suppose to and it all seems correct however the fat T I hooked up a hose to that that goes on the tip and connected the other end to the map sensor, and the idle drops but then when I use the throttle and let off completely the butterflies close completely and the throttle snaps back like normal and the bike still revs to let’s say 4K after I let go of the throttle and it’s like a delay it still revs at that rpm for maybe a second or 2 and then goes back down. I pulled the vacuum line off the fuel pressure Regulator and seems to be no fuel leakage or anything of the sort coming out so I don’t think it’s the fuel pressure regulator, but I could be wrong. But then when I hook up the map sensor vacuum line the original one that suppose to go to it the bike isles at 4K 5k and won’t go any lower. But then when I do that the delay or whatever you wanna call it in the throttle doesn’t happen. So im going to assume it’s something with the vacuum line or lines. Something is getting air somewhere and not suppose to or something I have no clue maybe even the plugs the bike always always ran rich so idk if it’s the plugs or a vacuum line. I have no clue obviously replace the plugs and see if that helps but I’d rather make sure I have all vacuum lines correct and other do it yourself at no cost fixes or checked atleast before I go and spend money and if not be the problem. Other than having new ****.

guide me the right way or something and I will get pics if needed. I wanna know what vacuum lines are suppose to be plugged and what aren’t and what’s suppose to go where. Vacuum wise. And it’s a 2002 f4i stunt bike wire harness bypassed bike ran fine always for months and month never been dropped nothing like that so. And I’m in Vegas so it’s not the Cali thing where I have to worry about that fuel tank emission thing or whatever. And keep in mind it’s a stunt bike so I know certain things need to be hooked up and somethings don’t really matter. And I have one hose from the fuel tank to the fuel pressure regulator and the main fuel line that goes from the tank to the fuel rail. So idk if something else is suppose to be connected to the fuel tank that would make the bike run like it is or if some lines need to be blocked off but I’m sure the other 2 things on the tank are just a vapor lock that should have a hose facing the ground I believe the other is maybe a breather or soemthing but the other 2 on the tank have no hose connected so it’s just the fuel pressure regulator hose the main fuel line and the wires that run to it.

So the only thing I can think of is maybe plugs vacuum lines what’s suppose to be what and where and what’s suppose to be blocked off. Or maybe injectors or something but just read back above and understand as much as you can as what’s going wrong. Please email me chonnie1216@yahoo.com