Help No Spark.....

[bobert]

I have recently re-built my 13b engine due to a snapped tip.
The engine went back in with no problems and it fired up and was running fine.
It was idling for about 20 minutes when it suddenly stated spluttering, missing and then it died.
When I tried to re start it was trying to fire but it just would not have it.
After a bit of investigation I found that the rear trailing coil pack was only one firing, and by this time it was getting late so I decided down tools and go home.
The next day I went down to fix it, when I was cranking it, it did not show any attempt to fire, it just cranked over and over.
Whilst cranking the engine I probed the HT leads with a spark tester pen, I found nothing coming down any of the HT leads.
I have got a 12v ignition supply to the ignighter and to all of the coil packs.
I have checked resistances from all the wires out of the coils to the ignighter and from the ignighter to the ECU, these are all ok.
Under cranking I have checked my rpm reading on my pfc and my crank sensors are working.
can any body help me out because I am running out of ideas.

1994 Mazda rx7 fd3s. extended street port, masterpowerT-70 single turbo, fmic, 1600cc injectors, power fc, profec b boost contorler,

[tezz12345]

i had no spark and they could not locate why so changed the whole wiring loom and not its fine

[Joeh]

You sure the immobliser isn\'t doing this? is your ECU properly connected? If the ecu isn\'t connected properly.. it won\'t even attempt to spark/fuel but the car will still turn over.

Best of luck
Joeh

[bobert]

I removed my immobiliser yesturday and its is still the same.
my fuel system is working because i can smell it when cranking.

the next thing I need to do is plug another ecu in. any body got one I can borrow?

[d-king]

ayup mate , ive got a panspeed ecu ya can borrow but dunno if that will work on ya set up seem as your single

[bobert]

ayup mate , ive got a panspeed ecu ya can borrow but dunno if that will work on ya set up seem as your single

It should fire up.

I have just sent you a pm

cheers mate

[d-king]

you have pm

[Joeh]

Make sure that you hold the throttle to the floor when you try to start it so the anti flood system kicks in and won\'t inject any more fuel so you can push out the fuel sitting in the engine

~Joeh

[fletcher9017]

kev your ecu wont fit its the same year as mine

[d-king]

mine only has the 8 bit ecu in it bud not the later 16 bit , must have been a change over model bathhurst ??

[fletcher9017]

has yours got 3 plugs or 4 plugs in the back of your ecu

[d-king]

mine has 4 plugs mate but one is disconnected and run through an knightsports fcdf :0)

[Joeh]

I thought only FC3S has 3 plugs

[d-king]

pass ?? know the earlier fd3s up to mid 1995 had 4 and after that only had 3

[Grizzly]

8 bit Fd\'s are 4 Plug (i.e. up to late 95, the 16 bit are three plug 96 on)

Am i correct in saying you have No Spark Front or rear? have a Look to see if there is Juice going in to the Coil packs? (the Coil pack Loom is usaly pluged in next to the Front plate on the Plug side of the motor)

I\'d also make sure the Ground next to the Ecu is good and there is a Good ground to the Coil Rail.

When you had it Running, was it smooth and idled ok? It sounds like some thing has come off (plug/Ground or Blown a fuse???) Does it Crank ok? And have you Put new Plugs in?