Ok I just installed my microtech. MY car was turning on till just about 15 mins ago. It used to run funny sometimes, like it was missing, and sometimes it would only run on the leading coils. Anyways, when im cranking the car I get no signal wats so ever to either the tach or the MT. It stays at 0 rpm. I scratched out the cranking speed by putting in a brand new bat and also attaching jump cables. But if I were to spin the cas really fast it catches and the injectors clik and the coils ignite. BUt I have to spin it really fast. If I rotate it slow(pretty quick, not tooth by tooth) about how it spins in cranking speed, I get no spark and no pick up.

 

This is a fresh rebuild. I also notice that there is white sludge in the oil. I know there is no compression leak through the cooling since there are no bubbles and the water doesnt overflow. Please help.

 

white sludge can just be condensation, normal.

Check to make sure the cable is shielded and attached properly. Also make sure you are getting enough power to the cas.

Sorry can't help anymore.

 

Find someone who is competent on tuning Microtechs.
99% of the time, it's the stand-alone tuning that's the problem...not the engine.


-Ted

 

What does tuning have to do with the MT not getting a signal from the cas???

 

Check your install.
The CAS rarely fails.
Else, the sensitivity setting (do Microtech even have such a thing?) might be set wrong?


-Ted

 

You can pull the CAS cover and perform a quick visual of the magnetic pickups and targets, and the attached wiring. It's a very simple animal, and if the magnets are spinning past the pickups with barely any gap at all then the CAS should be outputting a strong enough signal for the ECU to use (there is no power going TO the CAS, BTW)...

The next thing to check will be the wiring run, which is shielded. Pull the CAS plugs apart and spray everything out real good with some contact cleaner (don't forget the plug near/under the brake master cylinder).

If in fact the signals are too weak for the ECU, I'd bet the wiring (specifically the plugs) are the culprit.

There are minimum voltages you should be recieving at the ECU that can be checked with a simple meter, also...

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/troubleshooting-your-car-ecu-340578/

 

This is on a microtech. I mean the car was running fine before.. And ted no there isnt a sensitivity setting like on the haltech. What I dont get, is that when I spin it pretty fast it does pick up the signal,

 

If it picks up the signal when spun faster, this implies either an interference or clearance problem.

When mag sensors sweep by faster, the voltage output rises.

With interference, the higher voltage signal overcomes the interference so the Microtech finally sees a good enough signal.

If the mag sensor clearances are too far away, low speeds would not trigger anything.
You could try and reposition the mag sensors on the CAS to narrow the gap.
Just make sure they do NOT contact either other!
If they start to hit each other, you will destroy the mag sensor.


-Ted

 

can you actually do that? The gap is very small. I would have a hard time positioning it closer to the magnet, if its even possible. Im still looking for another cas. Still trying to figure out what happend to my old one?

 

Yes, you can change the gap, it's one of the phillips screws on each side. I'd get a pic for you but I'm not at home.

Also, do you have a cover on your CAS?

Thats a pretty strange problem, as Ted said, the CAS is almost NEVER the problem.

 

rxman720b had a similiar problem, and it ended up being his cas. I do have a cover on it, but I removed it to trouble shoot.