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Author Topic: Trouble starting hot  (Read 5089 times)

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DCFIREMANN

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Re: Trouble starting hot
« Reply #30 on: June 01, 2005, 06:48:15 PM »

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As crazy as it sounds I will ask does this happen all the time or when certain conditions exist? Such as when the fuel tank is almost empty? Is it possible that the fuel pump goes into vapor lock when over heated due to an empty fuel tank and the vtwin pressure cooker underneath it? Technically FI can't vapor lock but the fuel pump could possibly...


Tony I was leaning towards that line. What if an injector is leaking under increase fuel pressures in the line after the engine heats up? If one dealer has confessed the problem then I'm sure it's out there every where. I would love to know what kind of tweaking they did? Also it was stated (I think) that the motor doesn't want to turn over when warm. That also (as stated before) could be timing. Now how and why would the timing change after the bike was hot? The front cylinder has a temp sender and I know the bike runs richer to speed warm up when cold.

This is a good one but I'm sure Harley knows all about it.

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Twolanerider

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Re: Trouble starting hot
« Reply #31 on: June 01, 2005, 07:07:20 PM »

Quote

Tony I was leaning towards that line. What if an injector is leaking under increase fuel pressures in the line after the engine heats up?


Had thought about that also DC but it doesn't explain all the symptoms.  Having 50% of the engine not prepared to run might make it turn over a few more times before firing IF you started cranking before giving the fuel pump time to repressurize the system.  And I"ve seen injectors leak down in automotive applications before but it's always been in the process of crapping out when it did.

Even were that the case, however, it doesn't account for the slow cranking.  Or at least the only way it would is if an an injector leaked so much fuel that a cylinder was nearly hydro-locked.  Now that's a scary thought.  Can you say "boom?"  But, hey, there's not that much fuel in the line and the pump shuts off new supply.  So that couldn't be it either.
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tony1968

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Re: Trouble starting hot
« Reply #32 on: June 01, 2005, 10:04:16 PM »

I would lean more toward an electrical problem with a slow or no turnover issue. Starter motor, battery, solenoid, or connections, particularly the ground. A hot battery with a loose or corroded connection could cause that. Also with a high current draw, low battery voltage, would cause a non ignition event. But that being said I would think you would be to pull a code to show this.  I dont know about a leaking FI, I would think it would have to be a gusher to cause a slow or no turnover.
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DCFIREMANN

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Re: Trouble starting hot
« Reply #33 on: June 01, 2005, 10:25:09 PM »

You know guys I am really stumped on this one. It would be a lot easier if the bike was right here in front of us. I thought he said it wouldn't even crank till he tried it a few times. That could even be a starter relay or something in the ignition switch. I just worked on a 94 fatboy that did the same thing. The first thing I went after was connections then I thought starter. I jumped it under the seat around the relay and it would start everytime. Replaced the relay and it would still would not crank all of the time. Replaced the ignition switch and he has had no problem since. Go figure.

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Twolanerider

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Re: Trouble starting hot
« Reply #34 on: June 01, 2005, 10:51:14 PM »

Quote
Replaced the relay and it would still would not crank all of the time. Replaced the ignition switch and he has had no problem since. Go figure.

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The thing that's always hard for us (i.e., The bike's People) to remember is that when we thing "well, it could be ANY connection" it really could be any connection; no matter how physically small or how well screwed down.  What we always end up doing, however, is thinking it could be any connection and then still expecting either the biggest one or the one it happened to be "last time."  [smiley=7.gif]
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Mrs Red Hot

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Re: Trouble starting hot
« Reply #35 on: June 13, 2005, 05:11:49 PM »

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My first post to this forum and I have enjoyed the topics and information on the CVO's found here. I took delivery in Sept. 03 of an 04SEEG and have enjoyed many miles of trouble free riding. This bike has the Stage I SE A/C, SE slip-ons and has been remapped with the Race Tuner. This done in the spring of 2004. I'm planning to replace the exhaust later this season with something better than the current pipes/SEslip-on system. I'd like to keep or hopefully improve as much of the lowend torque as I can.  [smiley=1syellow1.gif]
 
My question. Lately this bike has been hard to re-start with a hot motor. Usually after less than a 15minute shut down. It can take several attempts before it will start. When cold or allowed to sit longer it fires right up on the first crank everytime no matter what the outside temp is. Idles well, performance and fuel mileage is great. Have used the Race Tuner and found no fault codes. I have good charging voltages (14 to 15v)with the system loaded and also use a bettery tender when not riding. Do I need a new battery or starter this soon?
      


Did you solve you engine problems yet?? My husbands last bike a 03 SE Road King did the same sort of thing. We would stop for gas and when we started off again the engine wouldn't start right up. It took several attempts and would make one heck of a noise restarting. Kinda like something inside the engine was comming apart. Our dealer said that this wasn't uncomman and there was nothing he could do about it. It did work as you said just fine if it had time to cool down a bit. Still my husband thought there was some sort of problem. His new SE E-Glide doesn't have that problem and a friends 2 year old SE bike has never done it either. :) Sandy
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HUBBARD

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Re: Trouble starting hot
« Reply #36 on: June 13, 2005, 06:58:48 PM »

Yeah, 'er 'uh, CRG103,
 I've read all of the responses to your topic, and it appears to me you have yet to be informed of a permanent solution to your "starting" situation.  Trust me, this will resolve it!  Keep a can of Starting Fluid, (ether), at your disposal while riding.  One slight compression of that miraculous vapor into the inside of your air cleaner will result in  [smiley=shocked2.gif]sure-fire starting, everytime! [smiley=huepfenlol2.gif]  There endenth the lesson.  Later--HUBBARD    
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103CRG

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Re: Trouble starting hot
« Reply #37 on: June 15, 2005, 09:59:26 PM »

Red Hot,

I found an answer to the hot starting problem. It's the fuel injection. I tried a few combinations of starting fuel and timing with the SERT and basically found out the injection was too rich. Have since done a few hundred miles in 90 degree heat here in NE (Fla. weather?) with multiple hot starts and it's fired right up on the first crank.. The starter sounds like new again. Since your in the SE, I thought it could be useful to others on the site. Keep the Shiney side up.  [smiley=happy.gif]

CRG  
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Mrs Red Hot

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Re: Trouble starting hot
« Reply #38 on: June 16, 2005, 07:11:59 AM »

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Red Hot,

I found an answer to the hot starting problem. It's the fuel injection. I tried a few combinations of starting fuel and timing with the SERT and basically found out the injection was too rich. Have since done a few hundred miles in 90 degree heat here in NE (Fla. weather?) with multiple hot starts and it's fired right up on the first crank.. The starter sounds like new again. Since your in the SE, I thought it could be useful to others on the site. Keep the Shiney side up.  [smiley=happy.gif]

 
Great that you solved the problem. Nice to know in case it happens with one of our two new SE bikes. Our dealer never tried much in helping my husband find what was causing his problem with the SE bike he traded in. It sure sounded a lot like the problem you were having. I'll make a note of this just in case it happens again. Thanks a bunch.  [smiley=xyxthumbs.gif]  Sandy

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« Last Edit: June 16, 2005, 07:15:29 AM by Red_Hot_SE_Fat_Boy »
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MAVERICK

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Re: Trouble starting hot
« Reply #39 on: June 26, 2005, 04:39:39 PM »

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My first post to this forum and I have enjoyed the topics and information on the CVO's found here. I took delivery in Sept. 03 of an 04SEEG and have enjoyed many miles of trouble free riding. This bike has the Stage I SE A/C, SE slip-ons and has been remapped with the Race Tuner. This done in the spring of 2004. I'm planning to replace the exhaust later this season with something better than the current pipes/SEslip-on system. I'd like to keep or hopefully improve as much of the lowend torque as I can.  [smiley=1syellow1.gif]
 
My question. Lately this bike has been hard to re-start with a hot motor. Usually after less than a 15minute shut down. It can take several attempts before it will start. When cold or allowed to sit longer it fires right up on the first crank everytime no matter what the outside temp is. Idles well, performance and fuel mileage is great. Have used the Race Tuner and found no fault codes. I have good charging voltages (14 to 15v)with the system loaded and also use a bettery tender when not riding. Do I need a new battery or starter this soon?
      

MAN SOMETHING AINT RIGHT!!!  [smiley=nixweiss.gif] [smiley=oops.gif] [smiley=shocked2.gif]
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103CRG

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Re: Trouble starting hot
« Reply #40 on: June 27, 2005, 08:50:39 AM »

MAN SOMETHING AINT RIGHT!!!
   
Just logged in a 12hr ride Sunday, 95+ temps here. So far so good, starts right up.  [smiley=xyxthumbs.gif]
I modified the Stage I start fuel profile on the SERT. Less fuel from 120F on up. The heat management curve adds more fuel in this temp range as well. Didn't want to change that. I originally saw high injector timing during the crank cycle. And got kickback before it would start. I'm sure this has caused some starter pinon/ring damage if not the clutch as well. But it's still under warrenty and behaving itself for now... It appears I'm not alone here. I agree with your statement. This AINT RIGHT.
[smiley=thumbsdown.gif]          
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