Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Tried "instant on" with my jeep. Odd results

Arragonis · 12-30-2013, 12:53 PM

Scenario A could be because the ECU is detecting the car moving and is making sure the brakes, steering etc. are covered. A little like in some cars when you pop into reverse the ECU raises idle by ~2-300 rpm so you can idle into a space without stalling.

EDIT - the ECU will also take a little while to swap from cold to warm programs, maybe it assume cold at first and then swaps over.

Scenario B is pretty normal when popping the clutch to restart, it was kind of rough on my 1.0 3cyl petrol so I assume something bigger would be even less smooth. What gear did you use and at what speed ?

12-30-2013, 12:53 PM	#4 (permalink)
Arragonis The PRC. Join Date: Oct 2009 Location: Elsewhere. Posts: 5,304 Thanks: 285 Thanked 536 Times in 384 Posts	Scenario A could be because the ECU is detecting the car moving and is making sure the brakes, steering etc. are covered. A little like in some cars when you pop into reverse the ECU raises idle by ~2-300 rpm so you can idle into a space without stalling. EDIT - the ECU will also take a little while to swap from cold to warm programs, maybe it assume cold at first and then swaps over. Scenario B is pretty normal when popping the clutch to restart, it was kind of rough on my 1.0 3cyl petrol so I assume something bigger would be even less smooth. What gear did you use and at what speed ? __________________ [I]So long and thanks for all the fish.[/I]