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Technical Rev counter

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Technical Rev counter

Having looked again at the wiring diagram in my haynes manual the wires I have going to and going from the fuel pump relay are as follows:

Brown/Black = power
Orange = from pin 26 on the ecu
Black/Violet = from pin 23 on the ecu
Light Blue = recevies signal from the twin coils
Orange/black = sends signal to fuel pump

Now I know that normally to run a rev counter you take a feed from the coil should I then connect the wire from the rev counter to the light blue wire coming from the twin coils to the fuel pump relay. Any suggestions welcome
 
Attached is a picture of the wire attached to the rev counter as you can see exactly the same as the instructions.
 

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I had a 4 cyl rev counter in mine and got it to read just under what my standard one was... where are you lot wiring them to :confused: i had mine in a door piller pod and it was one of them 52mm fasf an furious one's (y)
 
rlaw22 said:
Attached is a picture of the wire attached to the rev counter as you can see exactly the same as the instructions.
Click to expand...

Hi,
I think you may have to fit a set of clocks from a a later sporting with the immobiliser light and other changes....My clocks are from a non immobiliser cinq and fitted to a non immobiliser cinq.....you are fitting clocks from a non immobiliser cinq to an immobiliser cinq, this could be you problem :confused: hope you followed that.......

Thanks
Paul T
 
just a question,
did anyone fitted an aftermarket gauge, in a sei 900cc and the gauge worked?
 
Hi.
Just as silver sei I'm also trying to fit an aftermarket rev counter. Have followed several suggestions mentioned overhere but it's still not working. Wondering wether Silver Sei's unti is working or not.
 
I'm still wondering wether his unit is working or not. I've tried the black-violet wire also according to a SPI handbook (mine is an MPI Sei) this wire is connected to pin23. It also tells that the sporting models counter is connected on this wire, both a simplefied drawing as a wiring diagram are telling me that. Electronicly the counter is working so my gues is that the unit might broken. So I'm thinking of fetching a multimeter but don't really know how I can measure it's ok or not.
 
Anyone?
Am going to try the ignition. I've tried some measuring with my multimeter but it seems to be OK. Could it be that the pin 23 signal is to weak for my aftermarket rev. counter?
 
Tried the bobines, seemed to work but wasn't sure about what the counter was displaying was the right rpm. Nevertheless after having nicely worked away the wire behind the dash my car would start but it sounded far from running okay. Probably the signal to the bobines from the ECU got distorted and therefore the engine might only have run on two working cilinders. Would shielding the wire help me or should I try to boost the pin 23 signal from the ECU?
 
Hi,
sounds like the coil signal is taking the easiest route, which is through your rev counter and it will only read half engine speed. the signal from pin 23 should be strong enough for a after market rev counter, but you need to make sure you have a good positive and earth supply to the rev counter. Some people have found that immobiliser cinq's will not run when a rev counter is connected at pin 23, I think the relay for the rev countered car is different to that on a non-rev countered car, but I cannot access eper anymore so I have no way of checking this, maybe it has an extra diode within to stop signal back feed.

Thanks
Paul T
 
Hmm, the garage next to the studio where I work has that Eper system. The car came standard without a rev. counter but I find it hard to imagine that a small and rel. cheap car as a Sei has a totally different wiring as a sporting. But what do you mean exactly with a bad plus? I understand the possible cause but what should I do to find "a better" plus for the rev. cpinter. As for now all my aftermarkte gauges (also oil temp and pres) are wired to the radio the + as well as the - or ground.
 
Nils_Motoworx said:
Hmm, the garage next to the studio where I work has that Eper system. The car came standard without a rev. counter but I find it hard to imagine that a small and rel. cheap car as a Sei has a totally different wiring as a sporting. But what do you mean exactly with a bad plus? I understand the possible cause but what should I do to find "a better" plus for the rev. cpinter. As for now all my aftermarkte gauges (also oil temp and pres) are wired to the radio the + as well as the - or ground.
Click to expand...

Hi,
As long as you are happy that the + and - supply for the gauges are correct, then there should be no problem, otherwise a bad connection could cause a voltage drop causing incorrect reading of gauges.
The signal needs to come from pin 23, otherwise the rev counter will read only half engine speed, but for some reason on immobiliser cinq's, this can cause the car to not start, this is why I think there must be something different with the relay on immobiliser cinq.
On some Sei models the wiring for the rev counter may be behind the centre dash vent in the form of a 4 wire multi-plug.

Thanks
Paul T
 
I think indeed there's a good chance of finding something behind the dash, behind the vent knobs. Eper didn't tell me much but that's also I was in a kinda hurry. Isn't there also a way to get the signal from the sensor itself? It's connector to the wireloom is near the oilcap and easy to reach.
 
Hi,
You could get a signal from the crank sensor but it would need to be converted to a signal that the rev counter could read, rev counter needs one spike per rev, crank sensor I think gives 32 spikes per rev....

Thanks
Paul T
 
Think I've found the connecter! It's just behind the upper vent. shaft, in the middle of the dashboard. It's easy to pop it out, it's bit narrow but you can just slip your hand through it and there you'll find a connector with four wires: red, black and yellow and blue. It's just right underneath where the standard sportings' rev. counter is placed and where I've mounted my 5" monster tacho. But offcourse connecting the green wire from the monster tacho to the blue or yellow or both didn't work.....
 
Just went to a local Fiat garage en they told me it's impossible to connect a counter on my Sei. Well I'm nearly there, I think and I'm going to let them see that it is bloody possible.....arses even didn't want to give a printout of the handbook concerning ECU pins.
Can I measure the signal from the discovered connector? I've got a multimeter....
 
has anyone made any progress on this topic, later it seemed to go off on a tangent.
I have a 899 SX but miss the rev counter has anyone succsefully done it or not?
 
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