I woke up in the middle of the night last night thinking about my car (imagine that), and I was wonderign if there was a way to get the trailing plugs to fire on startup. Can you wire them up somehow so that they fire during initial crankup to elieviate flooding and hard starts? Wouldn't the additional spark help those Rx-7 owners whose cars are prone to hot start problems or flooding..?

I dunno I woke up this morning and that was written on the pad by the bed..

 

Hailers found a fix to the hot start problem and a fuel cut off switch would be much easier than what you're proposing.

Oh, and I'd hit it...

 

What makes you think they don't fire during cranking?

Flooding and hot-start problems are not caused by a lack of spark, so even if they didn't fire (they do), this wouldn't help.

 

I wonder why mine aren't firing then.... When I put a timing light on the trailing during cranking they don't light the timing light.....

 

Coil? Igniter? Wiring broken or unplugged?

One of these days Trev, you will have a car you can drive everyday!!

 

Worst thing I ever did was pull the Wolf out of this thing.. Hasn't run right since.. I am about to just go carb.

 

There's a plan!!

Zach in Smyrna has a friggin sweet carb set-up on his FC. Its beautiful!!!!

 

Carb = the suck.

 

I am trying another harness, if this doesn't work I am going to sell off all my FI parts and go carb.

 

There has to be a solution, something must be getting over looked. Have you tried a fuel cut switch? I can start a 7 with locked injectors with a fuel cut switch. Trust me lol

 

If you are using a timing light powered by the cars battery, it's not uncommon for the trailing wires to not show any spark/light on the timing light.

If you want to know if they are firing, pull a trailing plug and insert it into it's wire. Then ground the plug on something (the block) and have a friend turn the car over. You should see the plug firing in your hand.

Note: Don't be standing in water while doing this test...

Brian

 

You will also probably feel 20KV passing through your hand.

Hold the spark plug boot with insulated pliers. Trust me...

 

the way we've always checked for spark was get a small screwdriver. dip it inside the coil pack. get the end of the spark plug wire. and hold it close to the bare metal on the screw driver and look for the spark.

 

AHHHH!!!!!
all of you peoples methods is horrible!!!
you can buy a spark tester at your local autoparts store for under $3.
its a little black piece of plastice, with a metal clip on one end (the ground that you would put on the block) and a spark plug end on the other end (you put the boot over this part) its safe, easy, and cheaper than the cheapest mcdonalds value meal!

 

Why would anyone bother? Holding a plug against a ground point is free, easy and works perfectly.

 

I make my own value meal from the dollar menu.

I used to have hot start issue my self. Also while idling sometimes the engine would start to run bad and cut out or stall when coming to a red light. I check everything and I could only think of fuel pressure being to high. So I went and bought a greddy FP gauge and sure enough, the fuel pressure would spike during hot cranks and sometimes while idling causing the engine to stall.

I then disconnected the OEM FPR from the solenoid and connected it straight to the intake manifold and all my problems went away. Fuel pressure never spikes causing engine to flood or stall.

One thing I didn't check though at the time, this was about 4 years ago with my old engine, whether it was the ECU at fault or the solenoid. Im guessing the solenoid but can't be sure.

Cold start flooding was another issue I had with my old engine, but not with the one I have now. I hook the fuel pump wire up to a relay which was controlled by the antenna power wire, which only has power when the key is in the ON position. This way it was off during cranking but on while the key is in the ON possition and while the AFM has air flowing through it.

 

Well the new harness worked like a charm. And let me tell you this car is rediculous. I still need to set the tps and idle (ect.) but the car is really really fast. Poorly tuned it would eat my mustang gt's ***...