My engine keeps shutting off while driving. I can't seem to replicate the issue much while the car is standing still, it needs to be moving. Getting a code 11 from it. I've checked all my connectors, and tried shaking parts of the harness when the car is running at a standstill-netting nothing.
I checked the ECUs ground on the engine block-it was tight-but I removed it and sanded it down a bit as it looked dirty.
I checked the resistance between the +B/+B1 pins and the main relay socket, and, got 0 Ohms, it didn't hint at a bad connection (although there could definitely still be one). Ground pins for the ECU were also the same.
I pulled the main relay and checked it, got about 75 Ohms IIRC across pins 3 and 4. No continuity between 1 and 2 (as it should be).
In my frustration, I decided to hook up an arduino via a voltage divider (max input of 5v on the arduino's analog pins) so I could view the ECU's power feed line and log it while driving (in the hope I could determine whether the ECU was losing ground, power, or what).
I then took the car out for a ~15 minute drive. No problems that I could sense.
Got back home, dumped the data I recorded into excel, and I'm seeing drops to around 0V as measured by my arduino for up to 2/3 of a second. I sure didn't notice it while driving though, not like before anyway. (2/3 of a second is quite a lot to not feel, imo)
But, I swear, I could hear what sounded like a backfire or something once or twice while letting of the gas or decelerating. It might have been my imagination, but I dunno.
I'm thinking its a break in the wire or the main relay going bad.
If I were to ignore the data I recorded though (which I feel I have some reason to, due to it's jerry-rigged nature), I would assume my problem had been found (the ground). So tomorrow I'm going to go back through and try and clean up the ground(s) some more.
Anyone have any suggestions for me? The problem didn't technically recur, but, I just know Ill take the car out for a drive tomorrow when everything is back in the right place, and it'll do the same thing over again. The data also has me a bit suspicious.
appreciate any help
I checked the ECUs ground on the engine block-it was tight-but I removed it and sanded it down a bit as it looked dirty.
I checked the resistance between the +B/+B1 pins and the main relay socket, and, got 0 Ohms, it didn't hint at a bad connection (although there could definitely still be one). Ground pins for the ECU were also the same.
I pulled the main relay and checked it, got about 75 Ohms IIRC across pins 3 and 4. No continuity between 1 and 2 (as it should be).
In my frustration, I decided to hook up an arduino via a voltage divider (max input of 5v on the arduino's analog pins) so I could view the ECU's power feed line and log it while driving (in the hope I could determine whether the ECU was losing ground, power, or what).
I then took the car out for a ~15 minute drive. No problems that I could sense.
Got back home, dumped the data I recorded into excel, and I'm seeing drops to around 0V as measured by my arduino for up to 2/3 of a second. I sure didn't notice it while driving though, not like before anyway. (2/3 of a second is quite a lot to not feel, imo)
But, I swear, I could hear what sounded like a backfire or something once or twice while letting of the gas or decelerating. It might have been my imagination, but I dunno.
I'm thinking its a break in the wire or the main relay going bad.
If I were to ignore the data I recorded though (which I feel I have some reason to, due to it's jerry-rigged nature), I would assume my problem had been found (the ground). So tomorrow I'm going to go back through and try and clean up the ground(s) some more.
Anyone have any suggestions for me? The problem didn't technically recur, but, I just know Ill take the car out for a drive tomorrow when everything is back in the right place, and it'll do the same thing over again. The data also has me a bit suspicious.
appreciate any help
