idle RPM moving around?

T-Bird24
Posts: 23
Joined: Sun Aug 05, 2018 11:22 pm

idle RPM moving around?

Postby T-Bird24 » Thu Oct 11, 2018 9:43 pm

G'day
is it normal for the idle rpm to moving around. im using a e11v2 ecu. at idle its moving between 2 different bars in the 2D view. Im just unsure why its doing this?
can anyone help please.

T-Bird24
Posts: 23
Joined: Sun Aug 05, 2018 11:22 pm

Re: idle RPM moving around?

Postby T-Bird24 » Fri Oct 12, 2018 9:44 pm

Bump

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Peterson
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Joined: Mon Aug 17, 2015 2:35 am

Re: idle RPM moving around?

Postby Peterson » Sat Oct 13, 2018 4:29 am

load bars or rpm bars?

T-Bird24
Posts: 23
Joined: Sun Aug 05, 2018 11:22 pm

Re: idle RPM moving around?

Postby T-Bird24 » Sat Oct 13, 2018 12:00 pm

Peterson wrote:load bars or rpm bars?

RPM bars.

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Peterson
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Re: idle RPM moving around?

Postby Peterson » Sat Oct 13, 2018 7:42 pm

A variation of no more than +50 or -50 rpm at idle during operation is accepted however if you see more than that richer slightly mixture and see if that smooths things out.

T-Bird24
Posts: 23
Joined: Sun Aug 05, 2018 11:22 pm

Re: idle RPM moving around?

Postby T-Bird24 » Sat Oct 13, 2018 8:01 pm

Peterson wrote:A variation of no more than +50 or -50 rpm at idle during operation is accepted however if you see more than that richer slightly mixture and see if that smooths things out.


im using stock fuel injectors. size is 191 cc/min. with batch firing mode on a 6 cylinder engine. at the moment at idle it sitting at 2.600ms. do you think it needs abit more ms time. since the injectors are not very big.

T-Bird24
Posts: 23
Joined: Sun Aug 05, 2018 11:22 pm

Re: idle RPM moving around?

Postby T-Bird24 » Sat Oct 13, 2018 9:04 pm

T-Bird24 wrote:
Peterson wrote:A variation of no more than +50 or -50 rpm at idle during operation is accepted however if you see more than that richer slightly mixture and see if that smooths things out.


im using stock fuel injectors. size is 191 cc/min. with batch firing mode on a 6 cylinder engine. at the moment at idle it sitting at 2.600ms. do you think it needs abit more ms time. since the injectors are not very big.


its moving -200 or +200 rpm

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Peterson
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Re: idle RPM moving around?

Postby Peterson » Sun Oct 14, 2018 7:49 pm

You can start by making all the idle columns at above and under idle as far ignition and fuel the same and work your way from there.Give it more fuel slowly and observe the changes.Each engine is different but some things apply to all engines whatsoever.For example my 4 cylinder low boost 30 year old tech engine running semi-seq can idle acceptable up until 13.5:1 if you push it more towards stoich lean misfires start to occur.Large value variations at idle columns can upset stable operation especially at near stock engines.OEM maps are (almost) perfect examples of how a map should look and be.


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