Thread: Getting Idle hang or bouncing idle when taken out of gear with nismotronics

What do you guys think of the tune as far as fuel and timing

And then what about the idle do you guys think of the idle

And then overall

@JKTUNING @OnTheChip

Have you tried to physically set your base idle in timing mode?

Also you values in the Idle > Idle > Ignition > High idle ign retard need to be smoothed out alot and set to a proper value.

It is hard for anyone to have any input on your fuel and ign maps without you stating your set up and giving logs.

I had the same bouncing idle, solved itself when I deleted the coldstat wax mechanism on the VE throttlebody
http://www.sr20-forum.com/ve/75641-how-delete-waxstat-cold-idle-mechanism-ve.html

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wish that was my issue. i've had it from 1st startup.

Take a multimeter and measure the ground resistance on your TPS connector (its the black pin). Should be as close to 0 as possible.

Your open/close and close/open deltas are not set right. They are way too close to be working right I would suspect. You offset initial should be as close to closed throttle voltage as possible. You need to set your min tps and max tps voltage. Please ensure the clutch switch, pnp switch and tps are all working right.

well because the ecu is reading the coolant temp sensor from cold start to warm, if you have air in the system this can affect the readings and the ecu is monitoring the coolant temp sensor in conjunction with the idle tables, so if there is air trapped inside the system it might not let the car warm up to operating temps which in turn will not let the ecu go out of closed loop or down to operating idle. i had this happen on my aem ems, this is much the same the cts is working in conjunction with the iacv through the ecu so as you can see there could easily be idle issues given those facts.

just bleeding the coolant and making sure there is no air insures this is not the problem, the coolant temps will warm up, iacv will respond accordingly to the ecu tables and that should rule out the cts chain of command. but i would say it would rarely fix the issue, but its worth a shot.

I went into a empty parking lot and was testing the Iacv and aac valve and I was testing the idle from 900rpm to 750rpm and it kicked down and responded just like it should and went down to 750rpm. So I know my acc And Iacv are working like they should.

Then I was wondering since the car is cammed. If the bouncing could be the ignition map and it going from xx timing in the map. And wondering if the ignition map should be set say 15degrees all around the idle so it's not going from one degree to another this might help with the idle bouncing. It's a thought what do you think?

I will take a look at the tune. Most of my issues was with the two lowest load cells on the fuel table, there seems to be a balance that needs to be in check for the idle to behave properly. Once you get that dialed in it will idle smooth as butter. I have spent a lot of time on mine and now it is perfect.