Cylinder 2 Misfire help N62B44

[Fatcat]

Alright, it's been a minute since I've followed up with this forum, but I recently graduated and have time to myself.

We took apart the intake manifold and valve cover, and I got some pictures to show. You can easily tell that the cylinder 2 exhaust port has a lot of carbon buildup, which I'm assuming is a case of bad spark, because if it were a case of too much gas, it would be cleaner, no?

Anyway, we checked the springs and eccentric gear (the one in the picture, right?), and everything seems fine; regardless, we're replacing everything if I'm not wrong. my guess is the ECU is a shit one because before someone told my dad that it wasn't working well (his wording not mine) so we got one from LQK Pick Your Part and its ready to be coded and installed. I could be wrong, but I feel like it could also be the eccentric gear sensor, but the OBD2 port doesn't even work for me to monitor with my Foxwell scanner. We also might replace the valvetronic solenoid thingy if we have a spare one, which I'm sure we do.

I'm currently posting this because the engine is still apart, so if anyone has a clue for what to check for, I assumed that now is the time before we put everything back together. We're gonna do a leak-down test soon to see if any of the valves are messed up. im also gonna try to convince my dad to just completely replace the injectors and ignition coils because the ignition coils are mix and match of bosch and some aftermarket chinese piece of shit coils which literally broke apart as we were pulling it out. (cylinder 2 is bosch i already thought of that beforehand)

To those who said to clean the ECU, I did that, but with rubbing alcohol. Nothing changed, cleaned the ports too.

I hope the pictures I provided are good, but I can take some more before we put the motor back together.

Sorry if the pictures are too big, I didn't know what resolution to resize them to.

[EODguy]

Originally Posted by Fatcat

Alright, it's been a minute since I've followed up with this forum, but I recently graduated and have time to myself.



We took apart the intake manifold and valve cover, and I got some pictures to show. You can easily tell that the cylinder 2 exhaust port has a lot of carbon buildup, which I'm assuming is a case of bad spark, because if it were a case of too much gas, it would be cleaner, no?



Anyway, we checked the springs and eccentric gear (the one in the picture, right?), and everything seems fine; regardless, we're replacing everything if I'm not wrong. my guess is the ECU is a shit one because before someone told my dad that it wasn't working well (his wording not mine) so we got one from LQK Pick Your Part and its ready to be coded and installed. I could be wrong, but I feel like it could also be the eccentric gear sensor, but the OBD2 port doesn't even work for me to monitor with my Foxwell scanner. We also might replace the valvetronic solenoid thingy if we have a spare one, which I'm sure we do.



I'm currently posting this because the engine is still apart, so if anyone has a clue for what to check for, I assumed that now is the time before we put everything back together. We're gonna do a leak-down test soon to see if any of the valves are messed up. im also gonna try to convince my dad to just completely replace the injectors and ignition coils because the ignition coils are mix and match of bosch and some aftermarket chinese piece of shit coils which literally broke apart as we were pulling it out. (cylinder 2 is bosch i already thought of that beforehand)



To those who said to clean the ECU, I did that, but with rubbing alcohol. Nothing changed, cleaned the ports too.



I hope the pictures I provided are good, but I can take some more before we put the motor back together.



Sorry if the pictures are too big, I didn't know what resolution to resize them to.

On your foxwell does it power on at least when you plug it into the obd2 port? Key in the correct position? If not, it may be that the pins are pushed out or like mine the obd2 block was cracked and led to it not connecting.

If it gets power but zero connection with the car try letting it decode your ViN itself. A wrong ViN can (sometimes) make it look for modules, etc that aren't there and stop it from going farther.



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[Fatcat]

I have another scanner which does power on, but it does not connect first try, so I have to plug and unplug till it connects to KWP2000, then yeah, it reads most things, but it's a generic OBD scanner.

The Foxwell used to work perfectly before, and it got the VIN correctly automatically. The thing is that my Foxwell broke once, and I have a suspicion the X5 shorted it or messed something up. I already used my warranty, so I don't want to risk it, know I'm paranoid, but the scanner wasn't cheap and was a gift for my dad.

I have yet to check the pins, but if the other scanner connects, should I even bother? Regardless were most likely changing the ECU.

[EODguy]

I can't believe the Foxwell got nuked, they are tough. Mine has been through hell plus I keep mine in the door side pocket and the temperature here has gotten to 60c.

Keep trying and if it connects run the auto scan and then do a quick clear, rerun it one time more then do live data on any repeats or unclearable items.

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[Fatcat]

Yeah, I also got surprised paid around $250, and it just stopped working one day. emailed them, they said they can send me a new one, but I gotta send the old one back, and I use my warranty. I did what they said and this one works fine, but im not sure if I wanna plug it back into the X5 because now I don't have a warranty. not even sure if the X5 is the cause.

But yeah, I'll see what happens. I wanna check the live data to see what's going on.

[Henn28]

Duplicate

[80stech]

If the problem is only at idle and you ruled out everything else it's likely that a valve is not opening enough, (especially with that engine asfaik) so that is what you should be looking at, and for something that would cause that, especially now with the engine apart.

[workingonit]

Originally Posted by Fatcat

I have another scanner which does power on, but it does not connect first try, so I have to plug and unplug till it connects to KWP2000, then yeah, it reads most things, but it's a generic OBD scanner.

The Foxwell used to work perfectly before, and it got the VIN correctly automatically. The thing is that my Foxwell broke once, and I have a suspicion the X5 shorted it or messed something up. I already used my warranty, so I don't want to risk it, know I'm paranoid, but the scanner wasn't cheap and was a gift for my dad.

I have yet to check the pins, but if the other scanner connects, should I even bother? Regardless were most likely changing the ECU.

Have you tried your Foxwell on another car? Even if your Foxwell's software doesn't cover that car, the generic OBD should work.

Another thing, if the supplied voltage on your BMW's OBD port is too low, then the Foxwell might act up...my NT510 Elite really doesn't like low voltage (under 12.2v), so I never use mine unless I'm running the engine, or have a charger/maintainer hooked up.

I prefer using my Solar/Pro Logix 2320 (20 amp) that has a "stable power supply" feature, that maintains a constant 20 amps so my Foxwell never acts up, anymore. Of course, the 20 amps wouldn't be enough for coding later model X's, with more modules than my early E53, but I won't be coding anyway.

[Fatcat]

Originally Posted by 80stech

If the problem is only at idle and you ruled out everything else it's likely that a valve is not opening enough, (especially with that engine asfaik) so that is what you should be looking at, and for something that would cause that, especially now with the engine apart.

Quite the opposite, I can rev it in park, but once I put it in drive and accelerate, that's when it starts acting up, and I get a SAS and the engine cuts power

We're going to do a leak-down test to see so ill fill you guys in on what happens.

Originally Posted by workingonit

Have you tried your Foxwell on another car? Even if your Foxwell's software doesn't cover that car, the generic OBD should work.

I prefer using my Solar/Pro Logix 2320 (20 amp) that has a "stable power supply" feature, that maintains a constant 20 amps so my Foxwell never acts up, anymore. Of course, the 20 amps wouldn't be enough for coding later model X's, with more modules than my early E53, but I won't be coding anyway.

The Original Foxwell I got worked fine, it even had the BMW software, then one day it just stopped working, not just on the X5 but on whatever car I tried it on. Foxwell did some remote access stuff, and they considered the scanner faulty.

We now just use a generic OBD2 scanner, but that still has some problems mentioned earlier.

Originally Posted by Henn28

Duplicate

Duplicate?

[80stech]

A misfire only under load is usually a spark problem.