another 103" hardstarting update
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Elite HDF Member
Joined: Jan 2008
Posts: 4,351
Likes: 461
From: Illinois
another 103" hardstarting update
I have read and participated in many threads on this forum about hard starting issues with 103" builds. Many of us have reported the same problems with the 103" motor being hard to crank after it warms up. There have been many discusions about compression releases and start up timing. Here's my latest update.
Yesterday was a pretty nice day here. I took off from home after my bike starting just like it should. I rode about 15 miles, stopped to visit a friend, and had a hard time starting my bike. I remembered that someone on here had recommended not waiting until the engine light goes out to push the starter. I couldn't see how that would help, but I was frustrated and decided to try it. IT WORKED. I rode 500 more miles yesterday stopping several times. Each time I went to restart, I turned the ignition on and immediately pushed the starter button. It started very easily every sinlge time the rest of the day no matter how hot or cold the motor was.
I called my tuner this morning to discuss this with him. He says there is no doubt that he did not give me enough fuel for start up. He says when I wait until the light goes out, the fuel that has been pumped into the cyclenders has disappatied. It will disappate sooner when the motor is hot. He says it won't hurt a thing for me to start the bike the way I am doing it now until I get it back to him to adjust the cranking fuel with my SERT.
This has been very frustrating for me and several others with this issue. I feel for the first time I am about to get it corrected. I hope this helps some of the rest of you.
Dennis
Yesterday was a pretty nice day here. I took off from home after my bike starting just like it should. I rode about 15 miles, stopped to visit a friend, and had a hard time starting my bike. I remembered that someone on here had recommended not waiting until the engine light goes out to push the starter. I couldn't see how that would help, but I was frustrated and decided to try it. IT WORKED. I rode 500 more miles yesterday stopping several times. Each time I went to restart, I turned the ignition on and immediately pushed the starter button. It started very easily every sinlge time the rest of the day no matter how hot or cold the motor was.
I called my tuner this morning to discuss this with him. He says there is no doubt that he did not give me enough fuel for start up. He says when I wait until the light goes out, the fuel that has been pumped into the cyclenders has disappatied. It will disappate sooner when the motor is hot. He says it won't hurt a thing for me to start the bike the way I am doing it now until I get it back to him to adjust the cranking fuel with my SERT.
This has been very frustrating for me and several others with this issue. I feel for the first time I am about to get it corrected. I hope this helps some of the rest of you.
Dennis
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Elite HDF Member
Joined: Jan 2008
Posts: 4,351
Likes: 461
From: Illinois
I felt the same way Tex. I would really be pissed if I had done like some have and went to the extra expense of compression releases when all that was really needed was a little more cranking fuel.
Dennis
Dennis
Road Captain
Joined: Dec 2007
Posts: 501
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From: SW Iowa
Quote:
"He says when I wait until the light goes out, the fuel that has been pumped into the cyclenders has disappatied."
Sorry, this doesn't make any sense to me. Is he saying that while the fuel pump is audibly spooling up pressure, the injectors also are dribbling fuel into the cylinders?
The CR's so far have totally eliminated my hard hot starts, but, I always wait for the fuel pump to totally spool up to proper line pressure cut off before hitting the start button.
"He says when I wait until the light goes out, the fuel that has been pumped into the cyclenders has disappatied."
Sorry, this doesn't make any sense to me. Is he saying that while the fuel pump is audibly spooling up pressure, the injectors also are dribbling fuel into the cylinders?
The CR's so far have totally eliminated my hard hot starts, but, I always wait for the fuel pump to totally spool up to proper line pressure cut off before hitting the start button.
Banned
Joined: Oct 2007
Posts: 11,436
Likes: 13
Comp. releases expensive? I would say it will be more expensive if you have to take the top end apart again. My builder didnt even hesitate to put the realeases in my 95" build, said it was a no brainer the heads are already off. Easier on the whole system, starter and battery. Especially in the case of hot starts. Better to have and not need than to need and not have , i believe is a good motto.
Dont understand why your builder just didn't install at time heads were off, he probably should have insisted on it as part of the build.
Dont understand why your builder just didn't install at time heads were off, he probably should have insisted on it as part of the build.
Ultimate HDF Member
Joined: Dec 2006
Posts: 7,773
Likes: 7
From: Central Oklahoma
If you have a PCIII installed, it's harder to start after the engine light goes out. Same problem on a stock 96' with a PCIII.
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Thread Starter
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Elite HDF Member
Joined: Jan 2008
Posts: 4,351
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From: Illinois
Comp. releases expensive? I would say it will be more expensive if you have to take the top end apart again. My builder didnt even hesitate to put the realeases in my 95" build, said it was a no brainer the heads are already off. Easier on the whole system, starter and battery. Especially in the case of hot starts. Better to have and not need than to need and not have , i believe is a good motto. Dont understand why your builder just didn't install at time heads were off, he probably should have insisted on it as part of the build.
Dont understand why your builder just didn't install at time heads were off, he probably should have insisted on it as part of the build.Dennis
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Tourer
Joined: Mar 2008
Posts: 422
Likes: 3
From: PA
I have a 95" build with a PC III. It has always been hard to start. My resolution is to crank the throttle a little then immediately shut the bike off. Just a blip on the throttle and hit the kill switch. Ever since I started doing this the bike starts without any problems even if it sits a few days.
