Open loop when cold, closed once warmed up. This was my thinking as well. On normal vehicles, there are triggers (various temperature sensors) that'll switch it over. I just remember mad_sb saying that our cars run in open loop way too long I believe. I'm just wondering...if it's running pigrich, it's not taking in the air volume expected. Intake cam angle or throttle open % change, idle to idle?

i've observed the switch from open loop to closed loop on cold start. this is the exact moment that the load goes from crazy high (80+%) to normal (20-30%) and the idle settles down. the hunting up and down bit happens in closed loop after the switch.

Can you post a log up from cold start. Curious to see a few things, timing, air fuel ratio, commanded cam timing, as well as trims when it switches over into closed loop.

sounds like someone dinked with a table they didnt have to cause on all the cars ive tuned so far have yet to come across anything like this. sounds also like you maf scaling is off. you should have that much issue dialing in these setups. i spend more time building and adjusting ignition values while fine tuning than anything else.

I'm going to gather some in logworks format to share once my ot-2 shows up in a couple days. The ones I have now are from techstream. I can send them to you to review if you have the software.

this may be completely incorrect, but maybe something is possibly making your car go through a throttle body relearn procedure every time you start the car? I know this is a common issue with DBW toyotas after changing the battery.

When you refer to "load", what are you talking about here? I'm still learning about our fuel injection systems. I still don't know what "trims" are either.

Load is one of the parameters an engine uses to calculate fuel and ignition timing. It's pretty much a function of rpm and throttle input.

At very high rpm with the throttle barely open there is very low load. At low rpm, wide open throttle load is very high. Think of it as a measurement of how much work you're asking the engine to do.

Trims are offsets that the ecu applies to the base fuel tables based on sensor feedback. These are 'learned' or cached over time. High trims are bad.

So how is there any load at idle? You said your load goes from high/80% to low when the idle settles. Trying to grasp/visualize this.

Thanks for explaining.

I lied my idle is locked in between 980-930

Maybe it's something tied to the warm up phase. I'm guessing you're on pump not 85?

I believe the load is so high because its holding the throttle plate open to stay idling at such a rich afr. It smokes during this period as well.

Yes I'm on 93 pump gas. Haven't tried e85 yet.

@JuniorAWD any thoughts?