Well it took about six weeks to get it but my Techtom MDM-100 diagnostic unit finally arrived. It was on backorder from Japan. I hooked it up for the first time today on my lunch break. Its really cool. Checked all the parameters and most seem within acceptable ranges.

I don't really know what is standard for the injector reading in milliseconds. I'll have to check that in the FSM. It showed my timing at idle as 15 degrees. Thats good. About 8 - 10 other readouts as well.

I think it was worth the money as it will help a lot with diagnosing any future problems and may also aid in minor tuning.

Steve

Cool. I had one for 3-4 years and then one day it just stopped working. I'd like to get another one.

Where did you get yours and how much did you pay?

I want one, I want one!!! Where did you order through. There was one for sale a while back and I didn't have the cash to jump on it at that time. What did you pay? You will love that thing.

BRent

Originally posted by thepep
It showed my timing at idle as 15 degrees. Thats good.



It will always show your base timing at 15 deg, because that's what the ECU assumes.

ERRRRR if its like the snap on thing Ive got it will show it at 15 at idle and then all over the place as you rev it.....

Chris

Originally posted by CNibbana
Cool. I had one for 3-4 years and then one day it just stopped working. I'd like to get another one.

Where did you get yours and how much did you pay?

I paid around $300. It took a lot of searching etc. to find a place that sold it, since the original marketers, G-Force, are out of business. The new importer is Technosquare. I got mine at www.toysport.com. Its a mostly Toyota and Lexus site but I asked and they sold the Nissan version.

Steve

Originally posted by Dan_93SER


It will always show your base timing at 15 deg, because that's what the ECU assumes.

You know I wasn't sure about that when I saw it pop up on the screen. So what you are saying is that the computer will always say 15 degrees at idle because that is a pre-programmed "starting point" for the ECU? My actual timing could be set at 11 or 17 but the ECU, and consequently the Techtom, will still read 15?

Steve

Congratulations on your purchase. You won't regret it.

The MDM-100 is quite useful for keeping an eye on several readings. It's much more accurate than the stock gauges. First thing I noticed was how useless the stock temp. guage was. Heck, even the stock tach is off by at least 500 rpm.

Originally posted by Dan_93SER


It will always show your base timing at 15 deg, because that's what the ECU assumes.
That isnt true as Ive witnessed it on my car. My base timing is set at 15 degrees but it jumps around constantly, from 15-7. But that might be cause my Tps is bad. On another car with the same setup it stayed at 15 and then jumped to 17.

The base timing will be 15 on the techtom if your base timing is 15. The ecu sees 15 even if you have two degrees advance. That means the techtom will not show 17 if your base timing is 17. It will show 15, ibelive thats what he trying to say. This is also a known fact i was told by Clark at JWT many times about this.
Long Long Long conversations for those who don't know :>)

Maybe the Techtom isn't reading something right, because on my snap-on diagonstic unit I see the same - 15 at idle, but as you rev the motor the timing goes all over the place.... Or, on a few cars I've had it on where the idle was off the timing was higher. So the ECU can see the actual timing - it must be the techtom unit.

Chris

Originally posted by MauiBlueGride
Maybe the Techtom isn't reading something right, because on my snap-on diagonstic unit I see the same - 15 at idle, but as you rev the motor the timing goes all over the place.... Or, on a few cars I've had it on where the idle was off the timing was higher. So the ECU can see the actual timing - it must be the techtom unit.

Chris

No, the Techtom reads 15 at idle at that number definitely goes a lot higher with revs.

Steve

Originally posted by MauiBlueGride
Maybe the Techtom isn't reading something right, because on my snap-on diagonstic unit I see the same - 15 at idle, but as you rev the motor the timing goes all over the place.... Or, on a few cars I've had it on where the idle was off the timing was higher. So the ECU can see the actual timing - it must be the techtom unit.

Chris

It CANNOT see the base timing. I repeat it CANNOT see the base timing. Consult can't see it, OBDII port can't see it.

You set the car with a timing light in base timing mode at 15, and the ECU expects it to be there soooo it reports to all devices plugged into it monitoring timing that its 15 at idle.

Yes it will show advance but its assuming your 15 in timing mode at idle 750 +-50 rpms. It's just the same as you zeroing out a voltmeter. The readings are all wrong if you don't zero it out.

Greg Perry thought the same thing this past weekend. I threw my Snap-On timing light on his car and gained roughly 18hp because he was at 11! He too relied on a device that said it was 15. I told him the day before it was off by seeing where his distributor was positioned. Way way retarded back.

Originally posted by Thomas Reynolds


It CANNOT see the base timing. I repeat it CANNOT see the base timing. Consult can't see it, OBDII port can't see it.................


Thanks for the clarification!!

Steve

Originally posted by thepep


I paid around $300. It took a lot of searching etc. to find a place that sold it, since the original marketers, G-Force, are out of business. The new importer is Technosquare. I got mine at www.toysport.com. Its a mostly Toyota and Lexus site but I asked and they sold the Nissan version.

Steve

That site lists the techtom for the se-r at $405, how did you get it for $300, or is that a different product?

Brent

Originally posted by thepep
So what you are saying is that the computer will always say 15 degrees at idle because that is a pre-programmed "starting point" for the ECU? My actual timing could be set at 11 or 17 but the ECU, and consequently the Techtom, will still read 15?


Correct.

Originally posted by SucKit
That isnt true as Ive witnessed it on my car. My base timing is set at 15 degrees but it jumps around constantly, from 15-7.

Notice I said that it will always display 15 degrees as your base timing, which means at idle. Of course it's going to jump around as you come off idle, but it will always assume the base is 15.

Another great function is the water temp. Very useful on the track. You can also use the Techtom to adjust your throttle cable.

My man I know what I wrote and I was refering to when I was Idling, both cars. If it isnt possible, than what is your explanation for it?

Originally posted by Thomas Reynolds
Greg Perry thought the same thing this past weekend. I threw my Snap-On timing light on his car and gained roughly 18hp because he was at 11! He too relied on a device that said it was 15. I told him the day before it was off by seeing where his distributor was positioned. Way way retarded back.

Thomas is correct on this one. I hurriedly set my timing (bad, bad Greg). When Chris (MauiBlueGride) hooked up the Snap-On Diagnostic tool on my car, it showed 15 degrees. So, I figured I was dead-on.

Thomas straightened me out on that one. 12+whp was the result of going from 11 degrees to 15 on the dyno at only 9 psi of boost. That Snap-On timing gun of Thomas' is the stuff, I tell you. Must find one...

And Thomas, I'll take that "Way way retarded back" comment as being aimed at my car's timing, and not describing me. ;)

Bottom line the ecu sees 15 and dont set timing based on techtom.

Originally posted by SucKit
My man I know what I wrote and I was refering to when I was Idling, both cars. If it isnt possible, than what is your explanation for it?

I think you're asking me, right?

If the MDM100 shows your timing jumping to 17, then you're not at base timing, as the ECU is adjusting it. Just because you're at idle, it doesn't meant you're timing is stuck at base timing.

Maybe I wasn't very clear before. At idle, the ECU will advance or retard your timing, so yes, it will jump around. I'm not saying your timing won't move around while at idle. I think this is what you're talking about.

What I'm saying is that the ECU assumes your base timing is at 15, no matter what you set it at with the distributor, and it'll advance or retard your timing from there. So on the MDM100, when the ECU isn't adjusting the timing, it'll display 15 degrees.

Hope that clears things up.