F4i not starting when warmed up
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
wait a sec.....the bike starts cold but stops when hot????? check ur valves!!!!!!!!! when the cams and bucket get hot they expand, could be making the valves crack open just a bit once the engine is hot. my bro had a zx7r...took us forever to figure where the hot miss fire was coming from.....ran minty when cold....
Didnt you read any of the 10 pages 
cereal killa
Joined: May 2008
Posts: 1,352
From: N.S Kanata
Re: F4i not starting when warmed up
i did.....I'm thinking ok....i smoke alot of weed so .....um i lost my train of thought...THANKS MAN!
i know you changed the starter already...same thing happened........relays???? what if the relay isn't closing for the main? i think you have to do a voltage drop between the battery and the starter and/or the ground wire. heat causes higher resisitance in electrical equipment....resistance itself causes heat. got a spare ecu???? i'm trying to find a needle in a haystack here.... Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
i did.....I'm thinking ok....i smoke alot of weed so .....um i lost my train of thought...THANKS MAN! i know you changed the starter already...same thing happened........relays???? what if the relay isn't closing for the main? i think you have to do a voltage drop between the battery and the starter and/or the ground wire. heat causes higher resisitance in electrical equipment....resistance itself causes heat. got a spare ecu???? i'm trying to find a needle in a haystack here....
i know you changed the starter already...same thing happened........relays???? what if the relay isn't closing for the main? i think you have to do a voltage drop between the battery and the starter and/or the ground wire. heat causes higher resisitance in electrical equipment....resistance itself causes heat. got a spare ecu???? i'm trying to find a needle in a haystack here....
I Have Too Much Free Time
Joined: Oct 2002
Posts: 16,023
From: Bangor, ME
Re: F4i not starting when warmed up
Does it run fine when it's hot or does it idle lower than normal? If it doesn't run well then I'm thinking it could be mechanical. If it runs fine and just won't start, it's probably electrical. This one has me stumped.
cereal killa
Joined: May 2008
Posts: 1,352
From: N.S Kanata
Re: F4i not starting when warmed up
could have something expanding from heat dragging the engine slower as it gets hotter.
cereal killa
Joined: May 2008
Posts: 1,352
From: N.S Kanata
Re: F4i not starting when warmed up
something in the starter drive? clutch..not the starter clutch but the engine /trans? hmm it would be rying to roll off on ya if that was it....excessive friction inside the engine? bearings? cam chain too tight? geez i'm thinkin...what that could be caused by.
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
Loosened the cam chain tensioner already.
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
I Have Too Much Free Time
Joined: Oct 2002
Posts: 16,023
From: Bangor, ME
Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
Im tired already bro. Tired of looking for this and checking for that lol. I got homeboy who sold me the motor coming by tomorrow so ima let him do what he wants to do first and then go from there. He keeps tellin me the motor is good and I keep tellin him his boys told me they beat the living **** outta this bike lol. Wouldve been nice to know that in advance Thread Starter
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: F4i not starting when warmed up
So who wants to laugh at my misery 
So Mike & I put his spare motor in my bike. I finished putting everything together yesterday and heard a ticking which I thought the motor was fucked up. Turns out the motor is fine and it was an exhaust leak. So okay, I replaced the headers with my headers, tightened up the bolts put the tank on blah blah blah. Started the bike - sounds good. Let the bike heat up to around 190 and turned it off and now its doing the same exact thing it was doing before 
When its hot it doesnt wanna run but from a cold start, it starts up fine. WTF What should I do? Should I replace the whole wiring harness? It has to be something with that right???????????????????????????????????????
So Mike & I put his spare motor in my bike. I finished putting everything together yesterday and heard a ticking which I thought the motor was fucked up. Turns out the motor is fine and it was an exhaust leak. So okay, I replaced the headers with my headers, tightened up the bolts put the tank on blah blah blah. Started the bike - sounds good. Let the bike heat up to around 190 and turned it off and now its doing the same exact thing it was doing before When its hot it doesnt wanna run but from a cold start, it starts up fine. WTF What should I do? Should I replace the whole wiring harness? It has to be something with that right??????????????????????????????????????? 
