9.9 to 1 idle AFR

[1bar]

Hi,

I was hoping you guys could help me with my idle issues. I have a stock motor LS1 with a turbo and EFI live software. I have two pumps in the tank, rails, -8 feed with 60 lbs mototron injectors. I scaled my IFR table for these injectors and my innovative wideband still says I am at 9.9 to 1 AFR at idle. What would be my next step to leaning out the idle so it won't stink the place up

Thanks,
Glenn

[Black02SS]

Adjust the VE table.

[1bar]

Thanks Chad, I am really new to this so I will try it and let you know how it goes. I have auto VE tuning and every time I flash an idle tune a couple of times it starts sturging and stubling

[GMPX]

Glenn,

Auto VE will battle (or be slow) to get something that far out back in.
Assuming the Injector table is scaled correctly then as Chad says you need to reduce the VE table numbers. Given you are that far out as a test I would just select the entire VE, reduce by 20% and just see if it starts and idles better.....it might go too lean, so don't give it a blast down the street!.
Thing is, if your VE ends up with really small numbers then you really need to redo the Injector table I'd suggest. As an example, if you end up with VE table numbers like 0.5122 Grams*Kelvin/kPa then something is not right with one of the base setup tables (like injector flow rate).

Anyway, just remember to take it slow and ask if you are not sure, we have had some users tune turbo LS1's as thier first tuning attempt, so it is possible.

Also, I know you tried to PM me but my PM box was full......it only takes a few days of not reading them and that's what happens, in future, I'd suggest posting up on the board and I'll try to respond here.

Cheers,
Ross

[Black02SS]

I have a question, what is your fuel pressure at the rail at idle? Did you take that into consideration when you scaled the injectors? Is your wideband setup correctly? If Yes, have you checked it with a multimeter to see if the voltage from the output is the same as live is seeing on the scaner?

Just some ideas.

[1bar]

Man, you guys are awesome. The fuel pressure at the rails is 60 psi and I used 60 psi when I plugged the numbers into RedhardSupras injector spread sheet. I also plugged 60 in for the flow of the injectors.

Chad, I have not tested the WB with a meter but the numbers on the scanner and the numbers from the innovate meter are usually the same.

Ross, thanks for the reply...just so you guys know, I baught efilive and jesse helped me get it all set up but I need to lean out the idle.

I will try reducing the VE and tell you what happens.


Glenn

[turboberserker]

I'm not familiar with that spread sheet, but those mototrons are 60lbs/hr @ 43.5psi. If that's what the spreadsheet calls for (the @43.5psi) its all good, but if it wants the actual, it should be closer to 70lb/hr.

Are you IFR values closer to 60 or 70?

[Black02SS]

This is what I come up with using 60lbs at 43.5 with a PSI rating of 60psi.

70.466426
70.923011
71.379598
71.836183
72.292770
72.597161
73.053746
73.510333
73.966917
74.271309
74.727893
75.184480
75.641065
75.945456
76.402043
76.858628
77.163019

[1bar]

Sorry guys,

School and work....

Chad that is what I came up with. I used the G/Sec part of the same calculation and put it in.

turboberserker, The IFR is set for 60..any thoughts?

TAQuickness helped me change the VE today and the sucker is still at 10.0 to 1 at idle

I wonder if the two intank pumps is to much for that IFR table

glenn

[Black02SS]

If you are only seeing 60psi on the rail, then that IMO shouldn't be a difference. Can you send me your tune? I wouldn't mind taking a look at it.