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103 Hard Starting PLEASE POST HERE
- Thread starter tasteM
- Start date
baree33090
New member
When I did the Stage II 103 kit with SE 255 cams I had the shop install manual compression releases as part of the project even though many on this and other forums contended they had thousands of miles without any starting problems hot or cold.
I chose manual compression releases over automatic simply because of ease of replacement should one fail (manuals can be serviced without taking the engine apart).
The 2010 FLHX came with the 1.4 kw starter from the factory so the only upgrade would have been a after market hi torque starter and from talking with many service techs the weak link in the process is actually the starter clutch most often.
To date I have experienced a couple of hard starts when the engine is hot and am very glad I had the compression releases installed. I use them every time I start the bike hot or cold as a matter of habit and have just worked them into my starting routine.
I chose manual compression releases over automatic simply because of ease of replacement should one fail (manuals can be serviced without taking the engine apart).
The 2010 FLHX came with the 1.4 kw starter from the factory so the only upgrade would have been a after market hi torque starter and from talking with many service techs the weak link in the process is actually the starter clutch most often.
To date I have experienced a couple of hard starts when the engine is hot and am very glad I had the compression releases installed. I use them every time I start the bike hot or cold as a matter of habit and have just worked them into my starting routine.
Littlechickenman
New member
That doesn't answer my question.
How many degrees should the timing be backed off during start up?
How many degrees should the timing be backed off during start up?
zachpellicone
New member
What do you mean? Start up i took to mean cranking?
You asked what you need to do to the table to make it easier to start. The answer is nothing, timing is set to 0 during cranking ie start up.
After cranking stops the ECM will time the engine based on the map. so when the engine is cold and the manifold pressure is higher than normal due to the high idle the computer will follow the map.
If you want to see how the ECM is timing the engine use the SEPST, either data log or view it live on your screen via the VCI.
But there is nothing you can do to the timing table that will make a difference when the starter button is pressed.
You asked what you need to do to the table to make it easier to start. The answer is nothing, timing is set to 0 during cranking ie start up.
After cranking stops the ECM will time the engine based on the map. so when the engine is cold and the manifold pressure is higher than normal due to the high idle the computer will follow the map.
If you want to see how the ECM is timing the engine use the SEPST, either data log or view it live on your screen via the VCI.
But there is nothing you can do to the timing table that will make a difference when the starter button is pressed.
PanicSuiteheart
New member
On my 103, I didn't adjust the timing at start up, I adjusted the Cranking Fuel Table values. In the SERT or Super Tuner software there is a Cranking Fuel Table with temperatures and I believe it is injector pulse width (someone can correct me on this). I changed the 80 C value to 16.1, the 96 C value to 14.1 and the 112 C thru 160 C values from 20.0 to 12.8. Engine now starts instantly when hot. I've made similar changes to this table with other Harleys that I've had with the same results.
I'm not familiar with other fuel managment software as to what they use for cranking fuel tables.
Let me add the following. From my experience of trial and error, depending on what you have, you may have to add or remove fuel when hot to improve starting. In my experience, it has been to remove fuel. At hot start up, my 103 and 95 were blowing black smoke. So, I removed fuel and it solved my hot start problems.
Hope this is the information that you are looking for.
I'm not familiar with other fuel managment software as to what they use for cranking fuel tables.
Let me add the following. From my experience of trial and error, depending on what you have, you may have to add or remove fuel when hot to improve starting. In my experience, it has been to remove fuel. At hot start up, my 103 and 95 were blowing black smoke. So, I removed fuel and it solved my hot start problems.
Hope this is the information that you are looking for.