K20A2 stock-tuned random idle surge

[XDarkPrinceX]

Hello everybody! XD

Having issue with the stock-tuned map surging randomly and holding between 1050 to 1350 and having a long decay sometimes (can't forget about this when in gear), as far as I can see nothing else changes during data log that would make it do so. I did check TPS and it was 1.6% to 103% would this be the culprit? attached the map and last data log.

[CalibratEd]

I would suggest you check the engine for vacuum leaks.

-Ed

[XDarkPrinceX]

If there was a leak it would be constantly random, I have idle set to 850 and 85% of time im at idle not moving its fine, it just randomly increases and holds anywhere between 1050 and 1350 for minutes at a time. On top of that swapping stock ECU back in has no issues it just purrs away.

[CalibratEd]

If there was a leak it would be constantly random, I have idle set to 850 and 85% of time im at idle not moving its fine, it just randomly increases and holds anywhere between 1050 and 1350 for minutes at a time. On top of that swapping stock ECU back in has no issues it just purrs away.

Have you tried the modified ecu in another car. It could be a bad install of hardware in the ECU.

-Ed

[XDarkPrinceX]

Everyone I know is either mopar lovers or have no idea about cars other than put key in and it goes. I've noticed jumps in ignition advance when this happens, could that be what is causing the surge to stay longer then it should? it just so odd it can last for minutes sitting at lights then next light it idles away 850 to 900 like it should, and sometimes a tap on the pedal to 2k and it drops back to normal idle, also I'm in Toronto so its alot colder here and the dyno tune from kmanager I believe was done in California, could the MAP and temperature differences be compensating the tune? Also don't want to hijack my own thread but the start on KPro calibration is sluggish compared to the stock ECU, stock I get 1 1/2 to 2 cranks before turnover, with the KPro it takes 4 1/4 to 6 cranks to turnover.

[XDarkPrinceX]

Just checked the first part of that datalog from when I left the stealership getting the ECU paired with my immobilizer and it surged at the lights after getting off the highway, IAT was fairly low 44f. this datalog ends when I stop at the bank, then starts again with the first file posted.

[XDarkPrinceX]

Datalog from cold start to my trip to the stealership

[KingK246]

If there was a leak it would be constantly random, I have idle set to 850 and 85% of time im at idle not moving its fine, it just randomly increases and holds anywhere between 1050 and 1350 for minutes at a time. On top of that swapping stock ECU back in has no issues it just purrs away.

Have you tried the modified ecu in another car. It could be a bad install of hardware in the ECU.

-Ed

Been reading post and you're very knowledgeable can you help me with my uk ep3 type r?

[CalibratEd]

If there was a leak it would be constantly random, I have idle set to 850 and 85% of time im at idle not moving its fine, it just randomly increases and holds anywhere between 1050 and 1350 for minutes at a time. On top of that swapping stock ECU back in has no issues it just purrs away.

Have you tried the modified ecu in another car. It could be a bad install of hardware in the ECU.

-Ed

Been reading post and you're very knowledgeable can you help me with my uk ep3 type r?

Sure. Let me know how I can help. Start your own thread or pm me.

-Ed

[CalibratEd]

Any luck with the car. I looked over the logs and file and i cant figure out what is making it fluctuate at idle.

-Ed