RC 1000cc car doesn't start well

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Oct 20, 2008 | 05:02 PM

#16

darwin_evo

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From: Belgium

i am not using e85. i am using 1000cc rc injector, but it is scaled to 835 in the ecu.

Oct 20, 2008 | 05:06 PM

#17

lan_evo_mr9

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From: MD

My alt map(e85) injector scaling is set to 622. Does this definition only work for the 'low octane' map or will it affect both maps? i.e. alt map?

Last edited by lan_evo_mr9; Oct 20, 2008 at 05:09 PM.

Oct 20, 2008 | 05:09 PM

#18

kkarim

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Quote:

Originally Posted by darwin_evo

kkarim, this is what the table look like on my pc after i added the text to the xml.

i will try tomorrow to put in ecu with value /2 and see if it helps the issue.

i must do /2 only for the values on the right part correct?

don't edit the values on the left column. only the right one.

Oct 20, 2008 | 05:10 PM

#19

mfr122887

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Anyone have the address for this table in the 94170015 ROM? Thanks

Oct 20, 2008 | 05:11 PM

#20

RazorLab

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Quote:

Originally Posted by lan_evo_mr9

Just installed the definitions- worked perfect. Cold start e85 adjustment tips?

yes, bunch more IPW at cold coolant temps. Helped my E85 powered car crank up on the colder mornings. Tweaking the cold start timing map helps a ton too.

Oct 20, 2008 | 05:17 PM

#21

lan_evo_mr9

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From: MD

razorlab could you post your graphs (IPW)? I don't have a specific section in ecuflash for cold start timing. Is it labeled something else?

Oct 20, 2008 | 05:26 PM

#22

RazorLab

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https://www.evolutionm.net/forums/sh...d.php?t=347668

and

https://www.evolutionm.net/forums/sh...5&postcount=76

Oct 20, 2008 | 06:04 PM

#23

lan_evo_mr9

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From: MD

Awesome- the definitions took perfectly. How much IPW is a 'bunch"? Since the cold start maps are new to me, what direction to I have to go to help on the cold starts. Which areas do I need to tweak and by how much?

Oct 20, 2008 | 06:57 PM

#24

lan_evo_mr9

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Just flashed my car with the new modded defintions and it fired up on the first try. So excited! I was also able to stabilize the idle by adjusting the IPW adder. Thank you all so much for everthing! I have learned an unbelievable amount of stuff from everybody- thanks again!

Oct 20, 2008 | 11:49 PM

#25

n03lsevo

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From: california

Quote:

Originally Posted by tephra

Add this to your xml in ecuflash:

Code:

	<scaling name="ColdStartTime" units="ms" toexpr="x*0.008" frexpr="x/0.008" format="%.1f" min="0" max="500" inc="1" storagetype="uint16" endian="big"/>
	<table name="Startup Enrichment IPW Adder #1 (Main)" category="Fuel" address="5240" type="2D" level="1" scaling="ColdStartTime">
		<table name="Coolant Temperature" address="7100" type="Y Axis" elements="9" scaling="Temp"/>
	</table>

Then roughly halve all the values (560 -> 1000 = 2x as big)

Tephra will this work for the evo 8 rom id 94170008?

Oct 21, 2008 | 09:34 AM

#26

darwin_evo

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From: Belgium

is there another table i should be working on as well as the one mentioned above?

i tried to make it /2 on the right column in my ecu, it did not work for me. problem is still there.

should i try to make the values lower?

Oct 21, 2008 | 06:35 PM

#27

tephra

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From: Melbourne, Australia

Darwin - What are your fuel trims like? (you will need to idle for 5 mins and cruise for 10 mins to tell)

Oct 21, 2008 | 09:46 PM

#28

darwin_evo

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From: Belgium

Hello.

My fuel trims are 0/0 on Mitsulogger (evoscan gives +/- 0.xx on both) after staying idle for long time. more than 10min and cruising for a long trip, about 20km. I know my trims are correct, because my O2 feedback trim hover around +1/-1 most of the time, and the trims are based on this feedback.

I will try playing more with the table. Remove a lot of fuel, and add a lot of fuel, see if it actually makes difference.

Oct 31, 2008 | 06:03 PM

#29

darwin_evo

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I have lowered the values by half old*0.5, it didn't make a difference. I tried again by lowering to 0.7*old value, so the values in my table are now 0.35*initial value, and it still didn't help my start. it doesn't do it when the car is cold in the morning.

It does it only if the car has been off for 10 minutes to a 3-4 hours.

Are you guys sure this is the correct table for my car. I read that for other ecus, there are two tables where one is not in use.

Oct 31, 2008 | 06:26 PM

#30

dan l

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You may have to just fine tune the intermediate temperatures. IE: 100-150degF. I'm running bigger injectors than you, Fic 1150's that flowed 1190 and I experienced some slight hesitation when starting. After editing the cold start IPW I was satisfied. Further working the the "warm" start values and it starts really good now.

It has been my experience that if the car stumbles when starting up you are too rich and need to take out some IPW. If the car fires quickly and then stalls then you need more IPW at startup.

Also you are going to have to dial in your fuel trims well for this to work out for you.