18psi

iTrader: (76)

so get another tach?

I dunno what to tell you, but I feel like this is going nowhere.

We can't help you if you can't tell us coherently what is wrong, what kinda troubleshooting you did, and what the results of said troubleshooting were. I don't even follow what you're trying to say in your posts, and I'm genuinely trying to help you.

Good luck.

moharebusa

also i smell a non burned gaz from muffler?? is it may help so the coil is three or four pins??

moharebusa

thank you so much for your help..i understand but i am new miata lover..the whole thing is i want to fix my tachometer..so shop told me it has power and signal so it is bad?? i bought the second one and replaced it myself..but i still have the same problem..!!

18psi

iTrader: (76)

if you smell unburnt fuel. And your tach signal is erroneous. It seems fairly obvious you have a bad coil pack.

moharebusa

so is it the tree or four pins? is it easy to replace?

moharebusa

Also what i have is a signal?? it does not move?? it is just move when i turn the car on..then stop..and go back when i turn it off??

18psi

iTrader: (76)

no idea what you're asking about with the pins, I don't have an na. yes it is very easy to replace a coil pack. takes 2 minuts

moharebusa

thank you i will keep u posted..

RyanRaduechel

iTrader: (10)

Vlad, from my deciphering, I believe he already replaced the tach.

OP, look in the for sale section for used coil packs, or look on ebay.

moharebusa

yes i replaced tach with no luck..next will be coil..i have NO check engine light any way!!

wannafbody

iTrader: (1)

Check for coilpacks on Ebay

Braineack

iTrader: (62)

guys... 97 tach comes from ecu. noobs

frostyllama

iTrader: (3)

Jiggle the mouse cord

moharebusa

wat mouse cord?

frostyllama

iTrader: (3)

Leafy

iTrader: (1)

Dudes. 95.5+ have the tach driven from the ecu. The change corresponded with the change between 4 pin coils and 3 pin coils. If you have 3 pin coils the tach its driven by the ecu, if you have 4 pin coils the coils drive the tach.

Braineack

iTrader: (62)

Leafy gets a "not a dumbass noob award" for his post.

moharebusa

moharebusa

some one told me it is the CAS..??Can i clean it or i have to buy it new..??

Braineack

iTrader: (62)

it's not the CAS. that sends the cam position back to the ECU in order to run the car. If the engine is running, the cas is working.

the ECU interperts the CAS readings and sends a tach signal out to the dash.