Intermittent Lean Condition, FML
#1
Intermittent Lean Condition, FML
WTF is going on with the 2015-06-07 log? No changes other than minimal auto-tuning between the two. Barely got the car home on the second and luckily I was only warming up the car and not WOT when it went so lean.
96 chassis
03 VVT motor w/ NB2 sensors
Brain built DIYPNP
Car seems to run fine again now, but who knows when this will happen again. Can't drive a ticking time bomb...
ECU issue?
Electrical issue?
Heading out to re-check grounds again now.
96 chassis
03 VVT motor w/ NB2 sensors
Brain built DIYPNP
Car seems to run fine again now, but who knows when this will happen again. Can't drive a ticking time bomb...
ECU issue?
Electrical issue?
Heading out to re-check grounds again now.
Last edited by Ian; 06-22-2015 at 05:37 PM.
#4
Do you feel it go lean? Like bucking, runs like crap? You didn't post a whole lot of info for us to go off of.
What wideband? How old? Last time calibrated? Did you wire it as per the directions included with it? Is this problem new or always done this? Fuel system specs? Fuel pump type and age? Injectors?
What wideband? How old? Last time calibrated? Did you wire it as per the directions included with it? Is this problem new or always done this? Fuel system specs? Fuel pump type and age? Injectors?
#5
Do you feel it go lean? Like bucking, runs like crap? You didn't post a whole lot of info for us to go off of.
What wideband? How old? Last time calibrated? Did you wire it as per the directions included with it? Is this problem new or always done this? Fuel system specs? Fuel pump type and age? Injectors?
What wideband? How old? Last time calibrated? Did you wire it as per the directions included with it? Is this problem new or always done this? Fuel system specs? Fuel pump type and age? Injectors?
Heavy bucking on load. Sounds like it's running on 3 cylinders.
Zeitronix ZT-2. Unknown last calibration, but targets and diplayed AFR have never been an issue. Wired correctly. New problem. Fuel system is FIC 650 EV-14s @ 3bar base pressure, hard-wired AEM 320lph in-tank with under 1k miles, stock fuel lines.
#6
If you lost a cylinder it will appear lean because the fuel never burned.
Also looking at your log you are getting negative throttle positions. to the best of my knowledge this should never happen. you need to adjust the sensor or the offsets in the software. (i might be wrong tho)
I cant find a smoking gun with the data provided but i would assume being intermittent that it is a loose wire
Sorry if this doesnt help
Also looking at your log you are getting negative throttle positions. to the best of my knowledge this should never happen. you need to adjust the sensor or the offsets in the software. (i might be wrong tho)
I cant find a smoking gun with the data provided but i would assume being intermittent that it is a loose wire
Sorry if this doesnt help
#7
If you lost a cylinder it will appear lean because the fuel never burned.
Also looking at your log you are getting negative throttle positions. to the best of my knowledge this should never happen. you need to adjust the sensor or the offsets in the software. (i might be wrong tho)
I cant find a smoking gun with the data provided but i would assume being intermittent that it is a loose wire
Sorry if this doesnt help
Also looking at your log you are getting negative throttle positions. to the best of my knowledge this should never happen. you need to adjust the sensor or the offsets in the software. (i might be wrong tho)
I cant find a smoking gun with the data provided but i would assume being intermittent that it is a loose wire
Sorry if this doesnt help
There is no way I lost a cylinder. I did on my last motor and this is definitely not the case here. Car runs fine today, but I only started it up to wiggle around the ECU wiring as a test. No changes though.
I set the low TP value that way because it's the closest to zeroed. The next value up gives +2 at a minimum.
Thread
Thread Starter
Forum
Replies
Last Post