Discussion in 'Daihatsu Hi jet' started by greg0187, Aug 13, 2008.
I have to ask, what RPM is the tach reading at 45mph or around 70kph?
I assume you want the reading when the needle is @70kph. I have 25" tires so my speedo is off, but I don't think it matters, I'm just not actually traveling that speed. Someone correct me if I'm wrong??? I don't drive mine on the street here at my house but next weekend when I take her to the country I will see.
you are right greg, rpm vs. speedometer is the same relationship regardless of the tire size.
I installed a inductive digital tach. from Northern tool it took a little fooling around to get it to work properly but display will go blank if it is in direct sunlight or some other heat source, this makes the hour meter usless as it returns to zero when readout goes blank but all I was interested in was RPM anyway, @100K it reads 3250 RPM.
Cool. On my EFI engine I couldn't find a way to install an inductive tach. I tried to take some readings this weekend and at one mental note, at ~60kph it was reading ~2400RPM.
in what gear adn in what range? sounds high if it's in 5th?
Thats High range 5th gear.
Any tach with inductive pickup will work no matter how many cyls because you only register the number of pulses (RPM) on the cylinder the pickup is on. If pickup is on coil lead it will register once for each spark on a three cyl. you will have three pulses for each rev. Just checked RPM @60K -(38mph) it is 2000 rpm
With the 3 coil setup the twin cam has, there is no plug wire but the pos and neg wires are accessable on the coil. The coils set directly on top of the plug which goes through the valve cover.
Just an update to this post...
I was working with another member with a newer model truck to get his tach working and he found that the tach signal wire (Red w/yellow stripe at the ECU) was actually taped into the harness behind the instument cluster rather than terminating at the connector to the cluster like mine was. Sorry for the confusion.
Greg, I am planning on buying a tach for my 04 mits. and found this article on tach hookup using the trigger wire on one of the fuel injectors on efi engines. Thought you might want to check it out!
Hi Joe, Thanks for posting this. Although a valid statement the author failed to include a very important piece of information. Using this method requires a tachometer that has a 1 (one) cylinder setting. Also, it relies on a common +12v with a switched negative from the ECU. It does not guarantee that all systems operate in this manner. In addition, the pulse width of the signal to the injector varies according to atmospheric conditions (as controlled by the ECU). It is unknown if there would be any ill effect on the tachometer operation due to the variance in pulse width.
Checkout tinytach.com. It looks simple and cost $47
This wont work on a daihatsu EFI engine. It doens't have any spark plug wires to attach the pickup to.
I think it is probabily right the tach if you read 1100-1200rpm at idle, if your truck comes directly from Japan and anyone tuned it on US gasoline.
The three cyl. engine seems to rev slower than it do...
I feel the difference, and I'm italian, and here we have about only 4 cyl. cars, in US I know that cars has more displacement and cylinders...
You can adjust the idle (and then, after, the CO emissions).
You can find the workshop manual @ http://www.daihatsuhijet.co.uk/manuals-downloads/
I hope this helps.
I bought a tachometer for mine.
On its instructions, manufacturer says to connect it at the negative wire of the coil.
I can't try to connect it at now, but this week I do the work (I'm waiting for the tacho support that I bought on e-bay), then I say what to do.
Mine is a Piaggio Porter, but it is the same thing of the Hijet.
Tacho and EGT gauge mounted on the dashboard...this weekend I try to connect it.
Mounted and connected, it works perfectly.
I bought a "pilot" brand tachometer for about 50€ on e-bay.
Simply I set it to 3cyl and connect it to the negative of the coil.
Seriously I can't understand where it is the problem...
Thinking on what i read on this forum, I imagine I was in trouble and I figure to have huge problems to make it work...
I think, or the problem is in the type of tacho you bought, or about no one knows how and what to do to connect it...
Mine was a fuel injected engine with coil on plug, distributor-less ignition. that's probably why yours was easier.
In yours you need a tacho for a single cylinder engine, than you connect the negative of the coil to the tacho...I think it is easier than mine...
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