ECU question:
#1
Scooby Newbie
Thread Starter
Join Date: Nov 2018
Location: West midlands
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
ECU question:
I have a 2006 R Sport 2l. Has a flat spot/missfire at 2k-3.3k on medium or heavy throttle. Above 3.3k it's perfect.
Strangley if I reset the ecu and let it idle for 20 mins then drive it, it will drive perfectly for about 7 miles and then the problem starts again..
Question being, what typically will the ecu alter in the first 7 or so miles driving? Does it typically start lean and go rich? Start with retarded ignition and go more advanced? Trying to figure out what to target... I figure it can't be anything mechanical or it wouldn't be possible for it to run so well after reset.
So far I have done:
oil service
air filter
fuel filter
cleaned egrs
cleaned throttle body
changed maf
changed knock sensor
Any help really appreciated.
Oli
Strangley if I reset the ecu and let it idle for 20 mins then drive it, it will drive perfectly for about 7 miles and then the problem starts again..
Question being, what typically will the ecu alter in the first 7 or so miles driving? Does it typically start lean and go rich? Start with retarded ignition and go more advanced? Trying to figure out what to target... I figure it can't be anything mechanical or it wouldn't be possible for it to run so well after reset.
So far I have done:
oil service
air filter
fuel filter
cleaned egrs
cleaned throttle body
changed maf
changed knock sensor
Any help really appreciated.
Oli
#2
Scooby Regular
iTrader: (3)
why change knock/maf sensors unless they were broken? If you believe it's an issue with the ECU/corrections then best way forward is to get it plugged in and log what's happening. The ECU setup is similar to other subarus where you have a base timing after a reset and it moves up/down from there. If it has to remove enough timing then you get a load of extra fuel through as well as reduced timing.
Most likely guess so far is the misfire is causing the ECU to retard timing which results in no power on top of whatever fault you have mechanically - be hard to narrow it down without some diagnostic data though.
Most likely guess so far is the misfire is causing the ECU to retard timing which results in no power on top of whatever fault you have mechanically - be hard to narrow it down without some diagnostic data though.
Thread
Thread Starter
Forum
Replies
Last Post
Sammyb1
Engine Management and ECU Remapping
4
02 March 2015 09:51 PM
Cataluniya.no074
Engine Management and ECU Remapping
3
26 June 2014 09:04 PM