So I have a strange problem.
I have updated USB drivers and software updates and have gone through the uSB help troubleshooting. Still the same problem. With my laptop, I can interface with my S300 it shows "online" I can change the calibration, I can change values in the cell blocks of the mapping..... I can do everythhing ...... except...... Datalog. It seams as though when I start the car up it shows live data for maybe 5seconds then it drops out. No live readings on sensors, desplay, or tables. And it still shows "online"..... but I can't gain acces annything... I can still change things in the mapping but nothing is live even though it shows "online". It's like the USB cable is disconnected. But if I turn the car off and back on it pops back up "ECU connected".
I tried every USB port on my laptop.... does the same thing and all my ports are 2.0
I do not have the option of enabling Legacy USB support in my Bios. It's not listed in the Bios at all.
I am using a brand new TD-68U distributor with resistor NGK spark plug wires and NGK BKR7E plugs because I have a supercharger on my B-series. I have checked all my grounds. I have tried different USB cables. I have even tried a known good S300 ECU from my buddies car with my MAP on it with the exact same issue. My ECU datalogging memory is cleared. On-board datalogging is disabled. Same thing every time.
Ironically I try my wives old crappy Dell laptop with no battery...... and it works fine.
Now I will die if I steal my wives computer.
Does anyone have experience with this problem? Why can I not get my own laptop to work? I really need to datalog...... and I either need to do it with my laptop..... or buy a new laptop then I guess?
Help?
Datalog problem
Re: Datalog problem
How are you powering the laptop? What laptop do you have? What operating system do you have? Have you tried your laptop on someone elses vehicle?
Re: Datalog problem
It is a Asus Eee PC. CPU Intel N270 1.6Ghz, 1GB Ram. Windows XP Home service pack 3. Powered by its own battery and/or A/C adapter. Not hooked to cig lighter in anyway.
I have used this laptop in the past to tune other systems such as Megasquirt, BRE, and crome OBD1.
I tried it on my buddies car I borrowed the other S300 from and it behaved in the same manner as mine on my car.
I can only assume there is some strange comm problem with my laptop and S300.
I have used this laptop in the past to tune other systems such as Megasquirt, BRE, and crome OBD1.
I tried it on my buddies car I borrowed the other S300 from and it behaved in the same manner as mine on my car.
I can only assume there is some strange comm problem with my laptop and S300.
Re: Datalog problem
Does it datalog for longer if the engine is not running?
Re: Datalog problem
Yes. For a very long time.... in fact I don't recall having the problem at all untill I start the car.
Re: Datalog problem
What vehicle is this in and what exactly has been done to it?
Re: Datalog problem
1979 Fiat X-1/9
I used the engine and car harness from a 91 civic DX. Used a OBD0 to OBD1 conversion harness for ECM. Engine is a stock B16a as of right now..... I have to get the datalogging problem solved before I can bolt on the J/R S/C.
Only thing not "stock" is my WB255 fuel pump. Injectors and FPR are stock as of right now.
I used a stock del sol map in my S300 to get where I am right now..... But.... things are going to drastically change as soon as I start adding components to make some power. This datalogging issue is my stumbling block right now. I wanted to start off with a "stock" setup and get all the bugs ironed out before I add more to the equation.
I used the engine and car harness from a 91 civic DX. Used a OBD0 to OBD1 conversion harness for ECM. Engine is a stock B16a as of right now..... I have to get the datalogging problem solved before I can bolt on the J/R S/C.
Only thing not "stock" is my WB255 fuel pump. Injectors and FPR are stock as of right now.
I used a stock del sol map in my S300 to get where I am right now..... But.... things are going to drastically change as soon as I start adding components to make some power. This datalogging issue is my stumbling block right now. I wanted to start off with a "stock" setup and get all the bugs ironed out before I add more to the equation.
Re: Datalog problem
I think interference is the problem, im having the same issue with mine.
Re: Datalog problem
I suspect EMF interference of some kind also. I cannot imagine why a different laptop on the same kind of power source would not suffer the same problem though. All My dist pickup wiring is in the stock OE style shielded wiring. Unless........ hmmmmmm........ I am running an aftermarket Tach on the stock tach wire. Perhaps tonight I will disconnect it and try that since that is not an option I thought about before. I would still think that the USB interface would be enough of an isolation to not have a specific problem with a specific computer. I could see it if it were a serial I/O...... But I can't see it with USB.
I also have a friend coming over tonight that I might try my S300 on his car with my laptop to see if the condition is still present..... If I have no problems on his car with my laptop then I will look into my wiring.
All I did with the Civic harness is strip out all the wiring I didn't need... all my joints are soldered and heat shrink-ed.
I guess I should ask........ At this point what is the general mindset for making sure all the sensor grounds are separated from the chassis ground? Because..... I wasn't thinking about it at the time but I'm pretty sure I took a few of my sensor grounds (tps iat ect..) and turned them into common grounds..... I.E. even though they are still physically hooked to the proper sensor ground terminals on the ECM I also hooked them to the ground wires that are the main grounds for the ECM itself in essence hooking them to chassis ground. So.... that could potentially offer a source for some strange EMF interference from the chassis couldn't it? I wasn't thinking of that being an issue until now..... is the Honda ECU equipped with damping circuits on the ground side to help eliminate EMF interference? Would this ground scenario be something I should rectify?
I also have a friend coming over tonight that I might try my S300 on his car with my laptop to see if the condition is still present..... If I have no problems on his car with my laptop then I will look into my wiring.
All I did with the Civic harness is strip out all the wiring I didn't need... all my joints are soldered and heat shrink-ed.
I guess I should ask........ At this point what is the general mindset for making sure all the sensor grounds are separated from the chassis ground? Because..... I wasn't thinking about it at the time but I'm pretty sure I took a few of my sensor grounds (tps iat ect..) and turned them into common grounds..... I.E. even though they are still physically hooked to the proper sensor ground terminals on the ECM I also hooked them to the ground wires that are the main grounds for the ECM itself in essence hooking them to chassis ground. So.... that could potentially offer a source for some strange EMF interference from the chassis couldn't it? I wasn't thinking of that being an issue until now..... is the Honda ECU equipped with damping circuits on the ground side to help eliminate EMF interference? Would this ground scenario be something I should rectify?
Re: Datalog problem
You may have created ground loops which will cause interference. Try to resolve those. Some laptop computers are more tolerant of noise than others as well.
Re: Datalog problem
I am happy to announce that I found my problem.
In my infinite wisdom I felt that with my aftermarket fuel pump it would be wise to not run it directly off the main relay. I instead put another relay between the main relay and the fuel pump. Well.... I grounded that relay on the same chassis ground my ECU uses. So I found another ground point for my added fuel pump relay that wasn't hooked to the ecu ground and it's been working good ever since.
So it makes sense that this problem would occur when I started the car.... the relay must have been creating some kind of EMF interference from the primary coil winding in the relay when it would energize.
So now I can datalog
In my infinite wisdom I felt that with my aftermarket fuel pump it would be wise to not run it directly off the main relay. I instead put another relay between the main relay and the fuel pump. Well.... I grounded that relay on the same chassis ground my ECU uses. So I found another ground point for my added fuel pump relay that wasn't hooked to the ecu ground and it's been working good ever since.
So it makes sense that this problem would occur when I started the car.... the relay must have been creating some kind of EMF interference from the primary coil winding in the relay when it would energize.
So now I can datalog
Re: Datalog problem
Good that you found the problem. I'll remember to keep this info in my "toolbox" for future troubleshooting.Dr.Auto wrote:I am happy to announce that I found my problem.
In my infinite wisdom I felt that with my aftermarket fuel pump it would be wise to not run it directly off the main relay. I instead put another relay between the main relay and the fuel pump. Well.... I grounded that relay on the same chassis ground my ECU uses. So I found another ground point for my added fuel pump relay that wasn't hooked to the ecu ground and it's been working good ever since.
So it makes sense that this problem would occur when I started the car.... the relay must have been creating some kind of EMF interference from the primary coil winding in the relay when it would energize.
So now I can datalog