SManager crashing while datalogging

optix · Post by **optix** » Sun Apr 20, 2008 3:09 am

When reporting any s300 problems, please include:

- the calibration (as an attachment)
- a datalog of a problem (as an attachment)
- what sort of vehicle you have
- what sort of ECU you are using
- anything about the car which has been modified from stock which may affect the ECU (don't include what sort of rims you have nor stereo etc).
- a specific description of the problem

I've got a EDM 99 Civic with a d14z2 engine. I'm using a p28 with s300 in it. The car has a y7 AEM CAI, and a full exhaust with a high flow cat and muffler. I'm using a rywire OBD2b -> OBD1 conversion harness.

The problem I'm having is with SManager, it will lock up, and stop logging any data, but it will continue to log. The only way I've found to fix this is to unplug the s300 and plug it back in, then resume logging. Sometime this problem manifests itself in the first 30 seconds, sometimes it doesn't happen for 15 minutes.

I've swapped out the old sparkplugs with brand new NGK plugs and tried some bosch 4-prong's, and I put on some new denso wires, and the problem still occurs. I've also tried with 3 different laptops, dell d800, dell d620, and a macbook pro booted into windows xp.

Post by **Spunkster** » Mon Apr 21, 2008 10:01 am

What type of ignition does the car have, and are the plugs you are using resistor or non-resistor?

optix · Post by **optix** » Tue Apr 22, 2008 9:30 am

It's got the stock ignition system, and resistor-type NGK plugs, and resistor type Denso wires.

I just checked all the grounds, and buffed them with steel wool, and nothing's changed.

Post by **Spunkster** » Tue Apr 22, 2008 1:41 pm

Turn off on-board datalogging when trying to datalog using a laptop to datalog.

optix · Post by **optix** » Tue Apr 22, 2008 9:32 pm

Alright, I'll try that tonight.

optix · Post by **optix** » Wed Apr 23, 2008 12:49 pm

Alright, I disabled the onboard data logging, and still no dice.

optix · Post by **optix** » Thu Apr 24, 2008 1:58 am

I tried datalogging with the onboard logging while driving to work today. Here's the logfile.

Post by **Spunkster** » Thu Apr 24, 2008 10:03 am

Can you try the ecu in another vehicle and load a brand new calibration from File, New when doing the test.

Also try using a different laptop, as it could be an issue with the USB on your current laptop.

optix · Post by **optix** » Thu Apr 24, 2008 2:55 pm

I've tried three laptops, the usb going bad was my first idea. I even tried running it through a hub, same deal. I'm going to try a few different brands and lengths of usb cables next.

I'll start from scratch with a new calibration, but I don't have another car to try the s300 in.

optix · Post by **optix** » Mon Apr 28, 2008 11:07 pm

Alright, I tried a new laptop. This one was brand new, and after about 20 minutes of driving normally on the roads (Down the highway on the mountain, through town, on the highway outside of town, on base, etc.) it locked up again, like it normally does. Unplugging, then replugging and reconnecting worked, but I'm wondering if there's something else I'm doing wrong.

I started from scratch, and retuned from the d16a1 stock calibration, and I even disabled every other option I could find. Still no dice. I even tried putting a brand new distributor in, and tried that, and it still locked up after about 20 minutes. I have noticed that it seems to lock up more often when I go from low load to high load very rapidly, like when someone hits the brakes in front of me when turning, then I get back up to speed. I see the hanging more often when I use the fixed ignition timing option.

The capacitor inside the ECU that hondata replaces, could this be a sign of it going bad? The engine runs fine with or without the laptop connected, so I'm unsure. Should I replace the capacitor? My dealer didn't install the s300, I did that myself, and I'm sure that everything is soldered correctly, I used to work in electronics repair for a living.

Post by **Spunkster** » Tue Apr 29, 2008 10:21 am

Since this appears to be related to RPM it sounds like an ignition interference issue. Can you try using some NGK plug wires instead of the denso? Where is the ecu mounted?

optix · Post by **optix** » Tue Apr 29, 2008 1:48 pm

Well, I just tried a Monster Cables USB cable, on this cable the shield is connected only on the computer side, and it has two really big ferrite cores, I saw it when I was buying ram, and I figured "Why the hell not". It worked. Flawlessly.

The ecu is mounted in the stock location, and the old wires were NGK, I switched to denso to see if it helped.

I guess Monster Cables do have a use... Maybe that EMI shielding stuff isn't just bullshit..... Tomorrow I'll try lifting the ground on the ECU side of a normal cable, just to see. I'm curious as to why it did the same thing on three laptops. Bad cables suck. I can't believe I didn't try a new cable before.

Spunk: Thanks for all the help. I was getting really worried for a while there. You've been an awesome help. I'll probably never buy another ecu chip other than a hondata, these things are not only the best, but they have the best support.

Problem Resolved

allmotorh22a · Post by **allmotorh22a** » Mon May 05, 2008 7:08 pm

hey im having the same problem.....