I recently modified an MP Stage2 GLHS cal for 52# injectors for a guy. It runs great but now the idle speed on deceleration is 2000 rpm until the car actually stops Does anyone know what adjustment I can make to the cal to remedy this? I don't know if any of my table files show the address of this feature.
Verify that the SDS is working properly. I've had them fail in my GLHS which caused a 2k idle until the car was nearly stopped. To make things a bit more interesting there wasn't a code 15 set to guide diagnostics.
“If the people of the nation understood our banking and monetary system, I believe there would be a revolution before tomorrow morning.” -Henry Ford
Out of curiosity does it not come down until you stop or until you get under 5 mph?
Make sure the throttle body blade area is all clean...I have had that problem before....or...one time when I had the problem my expansive use of nitrous actually bent the blade!
[SIZE=3][COLOR=#000000]47 Time NHRA/IHRA drag race champ-----84 Plymouth Horizon/1 of 84 HO equipped from the factory/1910 lbs, 2.5 with carb, nearly 315,000 miles-----04 SRT4/S2 with S3 turbo/12.17 @ 119/DOTs/93 Octane/SOLD-----2003 PT Cruiser GT, won a True Street class at the 2017 National Muscle Car Association World Street Finals-----2010 Toyota Prius/my delivery truck, 77.9 mpg best and NOT A PLUG IN, nearly 230,000 miles and way over 5600 miles per month! [/COLOR][/SIZE]
Exactly, that's how it's designed to work, only not so much. I need to adjust it down by the cal.Originally Posted by jayspartanburg
The rolling decel control uses a target map/load strategy while the idle based control targets an RPM.
This is why there was mention of the speed sensor due to it being used to differentiate between the two methods.
Does the cal still use a stock map sensor?
Stock MAP sensor. Only the fuel maps were scaled for 52# injectors.
I am also having this problem. On decel the RPMs hold at 2000. Sometimes more, sometimes less. Today. it went just over 2500.
I have a ported head/intake/exhaust with a Turbonetics Stg III and 42 lb injectors. The cal I am running is Turbonator LM 2.5 MTX "Cust" scaled for the injectors.
I am also having this problem:
I am very rich on startup! LOL...
I have tried moving the AFR tables to match something described in another thread here, with no benefit. I have tried playing with the starting fuel tables, even plotted the expected pulse width in Excel given that strange formula in the "Table Description".
I am purposely not installing my wideband O2 because I don't want to coat it like the curb above, where I park every day at work.
Should I be playing with the pumping efficiency table to try to fix this? If so, do I need to move it up or down to lower the AFR?
Thanks,
Jeff
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