History of MembersPage/BrendanBlessing
Older Newer
2007-11-23 22:05:55 . . . . 63-195.60-67-cpe.cableone.net [Update]
2007-11-17 14:09:59 . . . . MembersPage/MarcellGal [coil fuse blown.. maybe IGBT failed to short?]
2007-11-10 23:52:10 . . . . 63-195.60-67-cpe.cableone.net [Update!]
2007-11-09 04:25:34 . . . . 63-195.60-67-cpe.cableone.net [New problems]
2007-11-09 04:21:46 . . . . 63-195.60-67-cpe.cableone.net [New problems]
2007-10-26 19:38:42 . . . . 53d8358d.adsl.enternet.hu [trigger and MAP sensor mounting]
2007-10-23 20:45:50 . . . . dsl51B63B08.pool.t-online.hu [help by Fero]
2007-10-23 06:46:51 . . . . 63-195.60-67-cpe.cableone.net [add picture]
2007-10-22 09:04:38 . . . . 63-195.60-67-cpe.cableone.net [New questions]
2007-10-17 09:25:53 . . . . 63-195.60-67-cpe.cableone.net [question]
2007-05-29 00:10:35 . . . . BrendanBlessing [adding the old questions back in]
2007-05-29 00:01:38 . . . . BrendanBlessing [Update]
2007-05-27 10:18:47 . . . . BrendanBlessing [Updating my questions]
2007-05-26 17:12:51 . . . . MembersPage/MarcellGal [serial hints]
2007-05-26 03:03:51 . . . . BrendanBlessing [Fixing image tags and moving some crap around]
2007-05-25 18:41:46 . . . . BrendanBlessing [Adding information to my page and a question]


Changes by last author:

Deleted:
Time to organize info to thematically organized subpages. At least for subsystems with issues. This gives chance to others so they can get overview and help. (with everything on one page it's hard to get overview so unlikely to get sufficient help).
Changed:
MembersPage/BrendanBlessing/InputTrigger - solved (VR polarity was reverse)

MembersPage/BrendanBlessing/IgnitionOutputs - maybe burnt ?

MembersPage/BrendanBlessing/InputTrigger
Deleted:
Update, the car had been running! (key word: had). I was getting some minor things worked out on it. Test driving and such. I ran a new shielded wire for my VR sensor and the car ran perfect with no errors.
Changed:
Problems:

1st problem- I was sitting by the side of the road tuning with my laptop. Everything was fine and dandy. I hadn't realized it at the time but my alternator was not charging. So while idleing i noticed the car was starting to develop a weird idle. I looked at the gauges and noticed that voltage was very low and before i could bring the revs up to give it some charge the car died.

Do you have a log of this ?

I tried jumping the car, that didnt work. After some work I noticed that the '''coil fuse had blown.

* What Ampere fuse ? The IGBT usually fails to short, if overloaded.

* how are the ign outputs set up ?

** you should try spare output, with lower dwell

** and measure ign-transformer current consumption (with known RPM and VBATT) if possible

So i replaced it and tried cranking it again. While cranking i noticed that trigger errors were popping up on Megatune. I enabled filtering and the car started right up and ran great.

<code>

ign_dwell14=37

ign_dwell6=1E

# maybe the dwell was too high for your coil at low VBATT?

tooth_wheel=0B

# 12-1 wheel ?

primary_trigger=05

# only "advanced filtering" is supported for missingtooth wheel (bit3=1),

# that is tooth primary_trigger=09

# Oldfashioned filtering _might_ work (at low toothnumbers like 12-1, definitely no-go for 60-2 10k RPM !)

</code>

2nd problem(where i'm at now):

I moved the car into the garage the previous night. I came out the next day and let it idle for about 1 min. The car died (i figured it was from a crappy cold idle tune) but it may have been due to low voltage; I had to get ready for something so i let it be. I came back later that night to do some more tuing and testing and it wouldn't start. It started up and ran like crap. When i could get it running i could keep it at about 4k rpm and then it would just die. I figured i'd try tackling it under the trigger errors avenue first. I first did a test by getting a new VR sensor and a new strand of sheilded wire straight to the ecu. I routed it around everything so that it would be as far away from noise as possible. Still the same result.

So i think i'm down to something ECU related. This was caused by (well what i can only assume) is the ECU trying to get the engine to run on ~9-10V and then the engine eventually dying. I will try putting a scope on it this weekend to verify that the signal is good. In the mean time I'm in need of some ideas. Here's my MCD and MCT for looking over:

http://myweb.cableone.net/mjbless/mct.txt

http://myweb.cableone.net/mjbless/mcd.txt

***UPDATE***

I just put the VR trigger on the scope today Reading from the jumper pins internally on the ECU and i'm getting nice consistant pulses. I think we're down to something ECU related now.

----

10-22-07

HELP!

I'm at the final stage, my ECU is the LAST thing left to do and i have some snags that I need to work out on the ECU before i can start the car. So if anyone has a bit of knowledge going into this and wouldn't mind playing tech support my AIM is bcool122 or you can post your IM handle. Doesn't matter to me any help would be appreciated.

Alright i'll start off with a few questions:

I'm afraid my anolog to digital converter might be dead or it might be something I need to change.I know that the TPS and MAP share a common 5v reference signal. When I power up the board on megatune the TPS and the MAP range are both at 100% and they slowly drop down consistently together until they get to about here???????:

<img src="mt.jpg"></img>

VR trigger

consists of a 24 tooth wheel that rotates at camspeed (12 tooth per crankrot)

* I've removed 2 teeth for a home signal

** please do NOT recommend anyone to remove 2 teeth. This practice should stop, do not spread it. It makes much more sense to remove 1 tooth.

I cant get the VEMS to respond to the Crank angle sensor under Multitooth but i can get it to make a response if i list it under "coil type" I'm spinning it at a decent rate too on the table. - "Special N-1" should be enabled - FERO

See IssueReports for what to include in your report (firmware, mcd, mct dump, etc...)

Please capture a InputTrigger/TriggerLog so we can see if your VR sensor is connected reverse.

* or move some ferrous metal

** towards (+ mV)

** than away (- mV )

from sensor, and measure EC36pin27 with DVM 200mV DC setting (against GND EC36pin26) that + and - are right (if not, swap sensor pins).

*(Brendan)Yep, had the polarity backwards

Sensor resistance Ohm = .... (measure and fill this) Ohm

<img src="trigger.jpg"></img>

<img src="CAS.jpg"></img>

...and all of this is going off of Jason Russel's design;

<img src="trigger_setup.png"></img>

----

10-17-07

I'm getting the board soldered up with all the diodes at the moment I put on all the ES2J diodes but i read in another guide that if I'm running high impudence injectors i need other diodes. Is this true or will these work?

----

Here's what the ECU is pretty much going to look like finalized (minus hoses and a few FETs on the bottom side) I went ahead and just mounted the flyback diode in the case:

vemsfinal.jpg

do NOT power up yet! Check the MAP sensor, looks like it's mounted upside down. MPX4250AP MAP sensor Pin1 has a notch, should be toward the AVR !!!

*Fixed! Works perfect Thanks

----

This is where my car sits right now, I'm down to some of the last few details for getting it running and one of those hangups is my VEMS V3.2. I've had the controller for a while but have just recently been needing to use it.

This is my Mazda RX-7 Swapped with the 20B 3Rotor motor.

Modifications:

"GT45 Spec" Turbocharger

60mm Wastegate

Stock short block

Afco Radiator

Dual Oil Coolers

Flexalite Slim Fans

550cc Primary Injectors

1600cc Secondary injectors

Aeromotive A1000 Fuel Pump

Aeromotive A1000 Fuel pressure regulator

-10 Fuel feed line

4" Exhaust to Dual 3" Megan Racing mufflers

1 in car display wideband

1 Wideband for ecu

Fuel Pressure Gauge

Oil Temp Gauge

KG/MM Springs

KYB AGX shocks

Energy suspension bushings

and the list continues from there

///Video\$FlgChr1$FlgChr> http://www.youtube.com/watch?v=5xKREvioJu8

engine2.jpg

engine1.jpg

underback.jpg

pump2.jpg