Quote:
Originally Posted by Dan37BRZ
Little update 5/27/17.
Edelbrock 1556 kit w/Delicious Tune.
Anybody with this setup and Delicious tune notice any random idle issues? For the past couple weeks the Delicous tune has been working out great for the most part.
I noticed a couple times this has happened, randomly too. I would come to a stop light after a quick pull and the car would hunt for idle, between 200-300 RPM to 1000RPM, and it would almost stall out then RPM's will go back up, then back down and nearly stall. I would have to give it gas to prevent it from turning off. Then when the light turns green, I take off normal to the next light and idle is back to perfect. 
NO CEL, no codes or anything. I don't know how I would even log this event because it's only happened twice randomly since I have installed the kit and I can't replicate it.
Also I noticed the car seemed to be getting slower each passing day, throttle response was getting worse each day, I was thinking I'm getting used to the power but out of curiosity I reflashed the car with the original tune Delicious sent me then reset the battery and OMG it felt like it gained 50whp, no joke. Anybody have to reset their battery to get the power back? Did I receive a bad tank of gas and the ECU just was stuck in some kind of retarded mode until reset it?
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I have just the carb tune, actually the pre carb approval version, and idle speeds do jump around a bit for no apparent reason. What my engine no longer does is stumble into a very low idle which it used to on stock ecu mapping, no Supercharger installed. So, I put up with the weird mind of its own idle variation. It's no big deal and does not seem to affect on throttle behaviour, which in itself isn't perfect but I put that down to timing variations needed to protect the engine when it is operating so close to detonation limits all the time. A feature I expect of the very high compression ratio for a boosted engine.
Bear in mind that the idle map is completely separate from the on throttle mapping and runs very lean and with pulled timing for emissions compliance. Only when the engine is on throttle is the O2 sensor adjusting mixture, and not when fully open throttle. I do not think your description of idle dropping to 200-300 rpm is the way it should be. High idle, up to 1,800 rpm occasionally seems to be normal but the very low idle should not be happening.