Firing order question..
Ron Morris
I have a question about the firing order of a Miata. I have a 97 that I just
tuned up recently and my friend has a 90 that he was wanting me to tune for
him. So, I went to his house and we did the tune up, but when I reinstalled
the plug wires, as per my Haynes manual, you could tell the firing order
wasn't right when we started it. After some switching of the wires on the
coil side, we got it running and it runs great. The question is, the firing
order is not what the book says it should be or what is on my 97. Mine
matched the Haynes manual. He recently had a dealer put a new timing belt
on his car. Could they have gotten the timing out when they did this and
compensated for the screw up by switching the wires around OR does the 90
not have the same firing order as mine? Thanks in advance for any info you
guys can give me.
Ron and "Chrsitine"
97 Black w/tan leather
Leon van Dommelen
The firing order is the same, the cam angle sensor is on there
backwards! It is a mistake in Haynes, which does not recognize
the order on the sensor has reversed (and gives 1993 data in one
place, 1994 in another without noting the difference.)
Leon
--
Leon van Dommelen :) Bozo, the White 96 Sebring Miata .)
REMOVE THE "z"s -> domm...@zmiata.net www.dommelen.net
"EXIT THE INTERSTATES" (Jamie Jensen)
Turbo Frank
1.6 : 3214
1.8: 4123
You may swap 2 wires on the same coil, so
1.6: 3214 = 2314 = 3241 = 2341 will all work
1.8: 4123 = 1423 = 4132 = 1432 will all work
cheers,
Frank
"Leon van Dommelen" <domm...@zmiata.net> wrote in message
news:394pft4phvspp1e03...@4ax.com...
Leon van Dommelen
>the firing order of a the 1.6 and the 1.8 is most certainly not the same.
>1.6 : 3214
>1.8: 4123
Well.., *Turbo* (not "Belt") Frank: my 1995 1.8l Mazda Workshop Manual
says the firing order is 1342. i.e. [14] [23] [14] [23].... My Rod
Grainger's 1993 1.6l "Enthusiast Shop Manual" says the firing order
is, surprise, 1342. Now who am I going to believe? Can you list
the source of your knowledge?
>You may swap 2 wires on the same coil, so
>1.6: 3214 = 2314 = 3241 = 2341 will all work
>1.8: 4123 = 1423 = 4132 = 1432 will all work
Cheers,
Leon ;)
Steven Spits
> Well.., *Turbo* (not "Belt") Frank: my 1995 1.8l Mazda Workshop Manual
> says the firing order is 1342. i.e. [14] [23] [14] [23].... My Rod
> Grainger's 1993 1.6l "Enthusiast Shop Manual" says the firing order
> is, surprise, 1342. Now who am I going to believe? Can you list
> the source of your knowledge?
I tend to believe 1342 is the right answser. The shape of the crankshaft for
a 3214 order would be unbalanced. Does anybody know what the shape of the
crankshaft is like? This would proof who's right and who's wrong...
> >You may swap 2 wires on the same coil, so
> >1.6: 3214 = 2314 = 3241 = 2341 will all work
> >1.8: 4123 = 1423 = 4132 = 1432 will all work
I had this discussion with Frank via email, maybe someone here can
contribute to the thread:
Each sparkplug in a Miata sparks twice per cycle. This means you can switch
the wires of two cooperative cylinders (1+4 and 2+3 as I believe). However,
you are _NOT_ changing the order. It stays 1342. Switching 1 and 4 on a 1342
will not result in a 2341 ignition; it stays 1342.
Steven
Black '92 Miata
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Steven Spits
I checked the picture of the crankshaft in my '92 shop Manual. It's a
standard crankshaft (°°°-...-...-°°°). So there's no way 3214 would be the
correct order. 1342, as Leon stated, is the one we're looking for.
I can't check 1.8, but I doubt if the crankshaft has a different shape... So
4123 is probably also wrong...
Steven
- - -
Turbo Frank
person who asked the question. He wants to know if his wires are placed
correctly.
Well, you put your ignition wires on the coils in the order I gave
1.6: 3214
1.8: 4123
If you don't believe me, take a look at my engine:
http://saturn.spaceports.com/~miata/images/misc/enginebay.jpg
You can clearly see that it most definitely is 3214 (and trust me, the car
runs fine :).
Steven and Leon, I'd very much like to know which order you are using. I
very much doubt it's 1342, could you check?
thanks,
Frank
"Steven Spits" <steven...@planetinternet.be> wrote in message
news:9drh6j$9i5$1...@news.planetinternet.be...
Turbo Frank
"Steven Spits" <steven...@planetinternet.be> wrote in message
news:9drh6j$9i5$1...@news.planetinternet.be...
Leon van Dommelen
>The order in which they fire is indeed 1342, but that's of no use to the
>person who asked the question. He wants to know if his wires are placed
>correctly.
>Well, you put your ignition wires on the coils in the order I gave
>1.6: 3214
>1.8: 4123
Well, Frank, Dr. Van Dommelen wrote in the message you objected to:
>>The firing order is the same, the cam angle sensor is on there
>>backwards!
I would like people to note that the most knowledgable, intelligent,
infallible Miata owners drive *belt* driven superchargers.
Leon ;)
Turbo Frank
ignorant SOB, not worthy of a miata.
Frank, Micro-Electronics Engineer, IT-specialist. Oh well, we can't all be
* Dr's *, now can we?
I guess there's nothing more to look for in this newsgroup. Bye.
"Leon van Dommelen" <domm...@zmiata.net> wrote in message
news:drp7gt0a1jibhn6l6...@4ax.com...
Steven Spits
> The order in which they fire is indeed 1342, but that's of no use to the
> person who asked the question. He wants to know if his wires are placed
> correctly.
> If you don't believe me, take a look at my engine:
> http://saturn.spaceports.com/~miata/images/misc/enginebay.jpg
> You can clearly see that it most definitely is 3214 (and trust me, the car
> runs fine :).
> Steven and Leon, I'd very much like to know which order you are using. I
> very much doubt it's 1342, could you check?
It's obvious we're talking about different things things here...
I was talking (and thought you were also) about firing order. That's
_always_ 1342, on my car and on your car. On any Miata!
You are talking about the order of the plugs on the coils. Yours is 3214,
and so is mine. The two left ones and the two right ones work together, so
3214, 2314, 3241, 2341 are all valid orders. But thats PLUG-order, not
firing order as you mentioned earlier. You said, and I quote, "the firing
order of a the 1.6 and the 1.8 is most certainly not the same. 1.6 : 3214".
I just pointed out this statement is most certainly NOT true.
Steven
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