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G*# D@^^N Emissions can't find my RPM?!!!!

Old Nov 2, 2017 | 05:42 PM
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GA G*# D@^^N Emissions can't find my RPM?!!!!

I have this issue every year!
This time I have gone to FIVE emissions stations and NONE OF THEM can get an RPM of less than 1400 at idle, and the battery/cigarette lighter detection gets ZERO (0) RPM.

BONE STOCK 1995 RX7
nothing is broken, works 100%.

what the actual HAIL does one have to do to get this thing tested?!
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Old Nov 2, 2017 | 06:07 PM
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Well, you are near Jim Dowling's Mazmart, and down the 75 is Mazcare, and there is always Jim Ellis Mazda. All of them can probably find the rpm on an RX-7 and/or recommend a test station that can.
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Old Nov 2, 2017 | 06:34 PM
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That's a problem with a lot of emissions inspections stations, many systems miscount ignition pulses for rotary engines. I had to go to a few here in CA before I found one that could read my car.
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Old Nov 2, 2017 | 07:14 PM
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Originally Posted by jza80
That's a problem with a lot of emissions inspections stations, many systems miscount ignition pulses for rotary engines. I had to go to a few here in CA before I found one that could read my car.
Yessir I am, I also work with Mazmart myself.

I am told there is a test lead off the trailing coil but i cannot find it.
I think that its only on the FC and not the FD coils.

Each emission station only has 3 ways to get the RPM...
1) Inductive contact on plug wire (1400 RPM reading)
2) Cigarette lighter (0 RPM)
3) Battery clamps (0 RPM)

Nothing is working.
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Old Nov 3, 2017 | 09:15 AM
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The inductive pickup needs to be on a trailing wire - the leading is waste sparked so it will be firing more often. Also, the pickup should be set to read as a 4 cylinder.

I've not gone through the emissions stuff (we don't have it in my state) but above is generally true and works with dynos.

Dale
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Old Nov 3, 2017 | 12:26 PM
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Originally Posted by DaleClark
The inductive pickup needs to be on a trailing wire - the leading is waste sparked so it will be firing more often. Also, the pickup should be set to read as a 4 cylinder.
That just seems stupidly simple, but it completely makes sense.
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Old Nov 5, 2017 | 09:17 PM
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I live in the Tucker area and also have a '95 FD. Last year I took it to this place and they were able to get the testing done. It was a random place I decided to try while running errands for the day.

https://goo.gl/maps/iaKmSua4Z382

The place I took it the year before was good too, but can't recall where exactly it was. As another alternative, there's another local GA FD guy that, I believe, runs an emissions station. Let me know if you want more info.
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Old Nov 5, 2017 | 10:52 PM
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As above if using inductive pickup, 4 cylinder dizzy setting on trailing HT lead.

Last edited by Slides; Nov 5, 2017 at 11:25 PM.
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Old Nov 5, 2017 | 10:58 PM
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Double?
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Old Nov 9, 2017 | 10:45 AM
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I did my emission here and he seemed to not have a problem getting mine. I know not near you but just wanted to post

Fast Emissions
5636 Mableton Pkwy SW # 1240, Mableton, GA 30126
(770) 819-5110
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