Question about Mazda RX-7

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Can get mazda rx-7 started.dont have fire on the #2 sideof the leading coil.or on either side of trailing coils.

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Relative link about RX-7 may helps

Posted on Aug 04, 2008

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1 Answer

Plug wire configuration

Quite easy actually. There are two rotors 1 - front and 2 - rear. there are two plugs per rotor Trailing - top and Leading - lower.
The distributor cap has letters and combination letters/numbers on it (if it does not you need to get a good quality cap) L and T and L1 T1 L2 T2
L is leading coil, T trail coil, pretty self explanatory from there
My recommendation from nearly 40 experience with rotary's is to use Mazda Mitsubishi Cap Rotor and NGK wires and plugs. Has been good enough for factory race teams also.
An issue with most aftermarket rotors is that they do not fit properly and can cause changes in timing and worse case, damage both cap and rotor.

Mar 29, 2014 | 1985 Mazda RX-7

4 Answers

Cant get mazda rx-7 to start

  • have you checked your batteries?
if not please check it..

Aug 05, 2008 | Mazda RX-7 Cars & Trucks

1 Answer

Firing order 84 madza rx7

If your tach does not work that is a symptom. Of course a timing light is most useful. If not you can coil wires (swap with known good wire) ; check ignitor,(swap trail/lead ignitor plugs at distributor) coil, check with ohm meter.
Trailing ignitors are very common failures, especially when either jump starting or being jump started when a battery is stone dead. What happens is there can be a huge power spike through the ignition system damaging the electronics in the ignitor. 90% of trailing ignitor failures happen during a jump start procedure.
At this age though, wires and coils can be suspect. My recommendation for ignition parts, Mazda Mitsubishi Cap/rotor and NGK wires and plugs. They are good enough for Mazda factory race teams and I have been using them since 72 with no ignition related failures in racing or all the street vehicles that have been maintained. Most critical is the fit of the rotor, it should be very hard to install, very tight fit. If loose the rotors have a tendency to rotate and move causing changes in timing and at worse damaging the cap and rotor.

Apr 20, 2013 | 1984 Mazda RX-7

1 Answer

On my 1985 rx7 12a does both leading and trailing spark plugs fire all the time?

The coils might be wire in reverse polarity. The FSM diagram shows that the B/W ground wires go to the terminals and the yellow striped wires go to the - terminals which is different than most.

Oct 08, 2010 | 1985 Mazda RX-7

1 Answer

I'm not sure which sparkplug and coil wires go

OK most stock engines for daily street driving use the NGK BUR6 and BUR8 spark plugs the 6's go in the Leading side so the bottom 2 spark plug holes. The 8's go in the Trailing side which is the top 2 spark plug holes.

Now as far as the plug wires. You have 2 coil packs one will have markings by the output tips that say L1 and L2 the other will say T1 and T2. its very simple L= Leading side, or bottom plug. T=Trailing side or top plug. 1=Front rotor, 2=Rear rotor.

Hook up everything that way and you should have no more issues.

Jul 31, 2010 | 1987 Mazda RX-7

1 Answer

I currently have a mazda rx8 231 2004. The engine management light came on and was told that the cat converter was gone due to misfiring spark plugs x 2 leading and x 2 trailing. these were all replaced...

just be careful i almost set my rx on fire i was told to get a tow to start it all that happened was the unused fuel was pumped it the cat and the whole lot was glowing orange when i stoped the car. the fault was a coil pack it cost me loads to get repaired

Dec 18, 2009 | 2004 Mazda RX-8

1 Answer

Mazda rx8 has no p0wer and smells of gas

check your coil packs i have to replace them after about 30,000 miles. its most likley on the leading plug you would hardly notice a trailing plug not firing

Oct 16, 2009 | 2004 Mazda RX-8

1 Answer

1987 MAZDA RX7

If it's over 170K it might just be super low compression that's the culprit. To find out I'll teach you the rotary engine mechanics secret weapon. Take out both the trailing plugs their the T1, and T2 plugs respectively. Now turn the engine by hand slowly watching the spark plug holes when you see an apex seal go by squirt a little transmission fluid into the plug hole, about 3 cap fulls is usually good enough. do this for both rotors remember there's 3 sides to each of them. Now just to be sure take the leading plugs out and spray them with carb cleaner to be sure they fire the first time around. Put all the plugs in their correct places, check the wires to be sure the leading coils and trailing coils are connected to the proper plugs. Then crank it over! If it runs like a brand new engine then its just worn out apex/side seals. This trick is also a great way to get rid of the carbon build up on the faces of your rotors. Hope that helps!

Nov 28, 2008 | 1987 Mazda RX-7

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