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Microtech Voltage

Old 10-18-08, 04:44 PM
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Voltage

Im reading about 12.63 to 13.02 volts on the hand set .
At the alt Im getting 13V I hooked up a set of jumper cables Frm my van that was reading 14 at the batt and I still gor 13.56 on the handset.
also when I turn on the headlights the Air fuel goes lean Soo Is it a Alt problem or do I need a larger guage wire to the Microtech.

And why isn't it like 14v

Thanks

Johny
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Old 10-18-08, 07:43 PM
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Alternator is a start.
either wrecked or not big enough or probably both.
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Old 10-18-08, 07:53 PM
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Thanks bud, You are always so prompt at answering these Microtech Questions.

But how come when I put cables on it it didnt register 14+ volts

Its an FD alt on my FC Ill have it rebuilt next week
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Old 10-19-08, 06:38 AM
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if you measured directly off the alternator and it didnt register 14V+ you either have a bad earth in the car(put an extra earth strap from chassis to block, and chassis to battery-). And then if you still dont have good voltage. Alternator is not working correctly.
If its an FD alternator it should be big enough, which means its either wrecked or not working correctly.
Have you wired it correctly?
What year model is your FC?
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Old 10-19-08, 07:21 AM
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Sorry for disturb, but is my display here normal.
My instrument is always at maximum 16 volt, but you can see the right digits at 13,44 volt.

Is that normal? Do you have the same software bug?
Attached Thumbnails Voltage-imag0127.jpg  
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Old 10-19-08, 10:46 AM
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My FC is a 87 but Im running a REW I know that my Grounds are good I have run #4awg to all the important acc. and the ecu. Im going to have the alt rebuilt. Then go from there
Thanks for you help

Here is the REW and my water to air I/C
and a old pic of the exterior
Attached Thumbnails Voltage-water-2-air.jpg   Voltage-tiffany2.jpg  
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Old 10-19-08, 10:47 AM
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KalliR, My laptop reads correctly same as handset
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Old 10-19-08, 04:02 PM
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Accessories dont mean anything mate.

The only earths THAT COUNT.

are.
Chassis to block.
Chassis to battery.

IF you dont have ATLEAST one of these 0 guage your earth system isnt very good.
If you are using smaller wire. Running 2 of each is recommended.

Did you rewire your alternator when you fitted it into your car?
It needs to be wired to a relay otherwise it wont charge correctly, it will flatten the battery, and burn the regulator.
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Old 10-19-08, 04:28 PM
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I dont have it to a relay but I do have a battery cutoff that I turn off when no running
I used this diagram

Sorry the diagram is fuzzy
Attached Images
File Type: bmp
ALTERNATOR.bmp (56.3 KB, 53 views)

Last edited by Johny zoom; 10-19-08 at 04:32 PM.
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Old 10-19-08, 04:43 PM
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That diagram shows the Terminal L to go to the dash.
Depending on your car some of them will operate the regulator in the alternator correctly.
Does your car automatically start charging when you start it? or do you have to pump the accelerator to get it to start charging?


Are your Reds coming on the dash when car is off and in ignition? and do they switch off once the car is running?
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Old 10-19-08, 07:09 PM
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The car starts charging as soon as I start it. And if Reds mean warning lights they turn on and off with ignition.
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Old 10-19-08, 11:53 PM
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then id say. its between your alternator being dead or bad earth.
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Old 10-20-08, 03:11 PM
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I took the alt to a reputible shop today. It tested good about 14 volts he load tested up to about 125 amps.
So I reinstalled it and resoldered all my connections and added/ replaced ground from fire wall to engine . Problem solved 14 to 13.2 no matter what I have on.
Thanks rx72c
Not trying to be a nut swinger but its nice to have people actually interested in helping not just flaming

you coming to the states anytime soon? I need a tune
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Old 10-20-08, 04:09 PM
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hahahah.
Their would have to be alot of tunes to make it worthwhile to come to the states.
lol
Maybe soon.

Anyways good to hear your problem solved. youll be shocked how many electrical problems end up being a bad earth.
If i was you.
I would add another earth strap from battery to chassis and one more from block to chassis.
Youll notice all your electrics will work even better.
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