|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
hiccup on moderate acceleration
|
|
12-17-2012, 11:29 AM | #1 |
Captain
42
Rep 659
Posts |
hiccup on moderate acceleration
I've had my procede rev 3 for a while now, with 50/50 e85 and 80/20 pwm.
on rare ocassion, on moderate acceleration, i would get a hiccup like symptom. then a couple seconds after that, i see the procede booting up. it does perfectly fine when i drive like a grandma or when i'm at the track/auto-x. I was logging it earlier today, you can see from the log that all the values are pretty much blank during these seconds. Anybody ever experience this before? no codes ever, and i wonder if it's a misfire or procede hardware got reset. I've ran across this type of problem in the past, and "fixed" it by switching the power trigger for procede (the other orange wire on green connector). now it's come back. any input is appreciated. |
12-20-2012, 09:31 AM | #3 |
Captain
42
Rep 659
Posts |
keep getting these hiccups. i do notice that it happens when the meth isn't flowing yet.
i think it's just a misfire, i wish there's a stupid code to know which cylinder. i wonder if i just don't have enough ethanol in my fuel mix. |
Appreciate
0
|
12-20-2012, 03:54 PM | #4 |
Colonel
184
Rep 2,841
Posts |
I used to get those temporary dropouts too.
Usually in the fueling side ie AFR's and fuel trims. Could very well be a misfire.....but then you would think there would be a code stored. A few other members on here have reported similar droputs in specific channels, so it's obviously not a pc usb connection issue. Mine has not reappeared for quite a few months now....and I couldn't tell you why It never hurts to do a complete firmware/map update and clear all your adaptations and see what happens after that. BTW, I am running the 3-13 maps and firmware. |
Appreciate
0
|
12-20-2012, 05:17 PM | #6 |
11
Rep 60
Posts |
I agree, it seems as if the PROcede is losing power momentarily, we recommend that you tap into pin slot 8 on the green power source. I would also recommend running a datalog while parked with the ecu cover off, try moving the wires around while logging to see if the power cuts out while you are adjusting them. Also wouldn't hurt to update to the newest maps and firmware available.
|
Appreciate
0
|
12-20-2012, 06:57 PM | #7 | |
Colonel
184
Rep 2,841
Posts |
Quote:
Also - did you notice what appears to be two huge ignition timing fluctuations for no apparent reason just prior to the dropout? |
|
Appreciate
0
|
12-20-2012, 08:21 PM | #8 | |
Captain
42
Rep 659
Posts |
Quote:
I've done the slot 8 pin log ago. and that's what i meant by "fixed" it in the past. I've done the newest maps and firmware ( i was already in newest firmware, but i reflashed anyway) i haven't tried wiggling the wires around, will try that. |
|
Appreciate
0
|
12-20-2012, 08:23 PM | #9 | |
Captain
42
Rep 659
Posts |
Quote:
which ignition timing fluctuations are you talking about? i think the points where timing goes to 0 is when the AT shifted. keep in mind this is not a pull, this is just me moderately accelerating through gears. |
|
Appreciate
0
|
12-20-2012, 08:30 PM | #10 |
Lieutenant
24
Rep 582
Posts |
Remove the meth pump's fuse, then go for a ride and try to get it again. Probably wont show up again, I saw that before and it was related to the inrush of current caused by the pump's starting with the boost switch around 3-4 psi. It sort if disturbed the Procede power and created that hiccup, like if the Procede rebooted.
Fix was to add a large capacitor either on the Procede power wire or across the meth pump's power wire. |
Appreciate
0
|
12-20-2012, 08:31 PM | #11 |
Captain
42
Rep 659
Posts |
here's the raw log.
I'm actually missing 0.5 second worth of logging in the raw log. it's very odd, even the CAN DME code resets. but no other code than the 12140 (intentional) |
Appreciate
0
|
12-20-2012, 08:35 PM | #12 | |
Captain
42
Rep 659
Posts |
Quote:
Since my pump is at the trunk now, maybe i should just use a different relay for the meth pump, keep the trigger. i wonder how hard it is to tap the battery directly (elegantly). |
|
Appreciate
0
|
12-20-2012, 08:45 PM | #13 |
Captain
42
Rep 659
Posts |
earlier today, my flasher was stuck on when i had another episode when meth was spraying. the only way i get it unstuck is to have meth kick in again and the flasher went off. i'm starting to wonder if this is all electrical issue instead of misfire.
|
Appreciate
0
|
12-20-2012, 08:46 PM | #14 | |
Lieutenant
24
Rep 582
Posts |
Quote:
I used that capacitor: http://www.digikey.com/product-detai...5-1-ND/2650335 Try disabling the pump (remove fuse) and run that way for a couple days, you'll see if that's the problem. |
|
Appreciate
0
|
12-20-2012, 08:52 PM | #15 | |
Lieutenant
24
Rep 582
Posts |
Quote:
Could also be the Procede power wire being loose... Just don't jump to conclusions too fast. Test without the fuse first. |
|
Appreciate
0
|
12-20-2012, 09:09 PM | #16 | |
Captain
42
Rep 659
Posts |
Quote:
Can i just do map 1 to test without the meth pump? |
|
Appreciate
0
|
12-20-2012, 09:34 PM | #18 |
Lieutenant
24
Rep 582
Posts |
Running the Procede on map 1 will exhibit the same problem because its related to the pump starting (with the boost switch) and not the activation of the meth injector.
|
Appreciate
0
|
12-20-2012, 10:46 PM | #20 |
Lieutenant Colonel
65
Rep 1,708
Posts |
Did you feel the hickup or only in the logs? Do you have canclear on?
Kalaud, I need to read over your posts again... so you suspected a spike through the relay? I'm curious and need to freshen up on the wire routing. I once had an issue where the car died... took a little bit to get it started again. At the time didn't think about Procede loosing power, but later I'm sure this is what happened. I grinded part of the ECU cover down to make a nice pathway for the wires... they were a little pinched before. Never happened again. |
Appreciate
0
|
12-21-2012, 08:59 AM | #21 | |
Lieutenant
24
Rep 582
Posts |
Quote:
|
|
Appreciate
0
|
12-21-2012, 09:00 AM | #22 |
Lieutenant
24
Rep 582
Posts |
I used that capacitor because I found it easier to source quickly, I don't think you need a larger capacitor, but it would works too.
|
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|