Tach on an EFI engine

**greg0187** · 08-13-2008, 08:35 PM

If you've got one i'd like to know how to do it.

Thanks,
Greg

**myhijet** · 08-13-2008, 08:50 PM

I was thinking, if there are individual spark coils, why not use a 1 cyl tach?

**greg0187** · 08-13-2008, 08:58 PM

I know. Of course I had to get the Tach that only works for 2,3,4,5,6,8,10 cyl. I almost got the one with the inductive pickup but that wouldn't have even helped.

**myhijet** · 08-13-2008, 09:14 PM

My cousin in VA has a 3 cyl bike. My experience with motorcycles is limited but is there an angle there?

Also, the spark pickup on my 97 is in the center of the top timing belt cover, between the cam and crank with the connector pointing toward the front. Could that be a place to get the 3 pulses required for the 3 cyl setting of your tach?

Another thought, I had a digital volt meter that had a frequency setting. Wish I hadn't let the smoke out of that one.

**greg0187** · 08-14-2008, 08:16 AM

Originally Posted by myhijet

My cousin in VA has a 3 cyl bike. My experience with motorcycles is limited but is there an angle there?

Also, the spark pickup on my 97 is in the center of the top timing belt cover, between the cam and crank with the connector pointing toward the front. Could that be a place to get the 3 pulses required for the 3 cyl setting of your tach?

Another thought, I had a digital volt meter that had a frequency setting. Wish I hadn't let the smoke out of that one.

I'm not sure about the bike but I did think about the camshaft sensor you are talking about. I have a frequency counter I can connect to it. It may be the only option.

-Greg

**Mighty Milt** · 08-14-2008, 08:34 AM

greg did you try the brain box in the dash?

**greg0187** · 08-14-2008, 09:09 AM

I pulled it out last night. Its just a hodge-pauge of wires w/o any clue to what is what, and it doesn't look anything like what was posted on the DaiClub website. I assume it will be a wire not connected to anything, but that is going to be a challenge.

-Greg

**greg0187** · 08-14-2008, 10:48 AM

BTW. Has anyone ever seen a Daihatsu truck with an OEM Tach? Weather it be a truck, van, or deck van? My searches come up with nothing.

-Greg

**greg0187** · 08-14-2008, 06:47 PM

Well...I called Leon at Daihatsu help today. I kind of figured the newer models were out of his ream, but I figured I'd give him a try anyway. No dice. Nice guy though, and he was willing to help however he could. So anyway.... I got out my logic probe and started taping the wires at the ECU. I'm getting a negative pulse from the camshaft position sensor at the ECU so as long as the tach is a high resistance circuit it should work OK. Actually its the only wire I tapped into. I haven't tried the tach yet but I'm confindent that it will work. When I try it out, if it works, I'll make a pinout of the ECU and where to make the connections so everyone else will know.

Cheers,
-Greg

**Mighty Milt** · 08-14-2008, 08:27 PM

good job greg!! forge a path for us to follow...

i'm not hi-tech like that, i would have just put the green wire to each terminal till i got th needle to move... like i said, i'm just a dumb welder

**greg0187** · 08-16-2008, 04:55 PM

Actually....I looked alittle further and found what I believe to be the actual tach output. I didn't want to probe around too much risking damage to the ECU. I'm still planning on posting the wiring meanwhile heres a pic of the install location. The only thing I regret is that its not a CP2010 (Black face). I mounted it to the pillar just below the hand grip. I had to fabricate a new mounting bracket out of 1/2" flat steel, the OEM was way too large.

-Greg

**Mighty Milt** · 08-16-2008, 05:38 PM

so, does it work? what kind of rpms are you turning?

**greg0187** · 08-16-2008, 09:41 PM

I works OK. I wouldn't go over 7K RPM, 6K seems to be a good shift point...at least thats I set the shift light.

-Greg

**Wolfman** · 08-16-2008, 10:58 PM

I don't know if the EFI engines were reworked or not, but I remember Leon telling me that the valves start to float in the Hijet at 5800 RPM in the 660cc carb engines.

**greg0187** · 08-17-2008, 02:30 PM

Originally Posted by Wolfman

I don't know if the EFI engines were reworked or not, but I remember Leon telling me that the valves start to float in the Hijet at 5800 RPM in the 660cc carb engines.

The EF-VE engine shows max HP at 5900. My guess is that redline is not too far past that. Redline is probably in the 6500-6800 range. Its just a guess though.