EDIS Spark/Fuel but non-starter :(

63 Bug
Posts: 40
Joined: Sun Jan 25, 2004 1:33 pm

EDIS Spark/Fuel but non-starter :(

Post by 63 Bug »

I've fitted EDIS to my car with the intention to add either Megajolt or Megasquirt in the future as funds allow.

I've wired it in according to the numerous wiring diagrams available and I cannot get it to start. I dont have the coil +ve feed capacitor, but I understand that it is not needed, especially for the engine to just run and idle.

I've got a spark, I've got fuel because the engine is still on carbs which I know are good.

The VR sensor is gapped to about 1mm and the 36-1 wheel missing tooth is 90° off from the sensor (9 teeth, clockwise, engine rotates clockwise)

I'm getting a 1.7VAC reading off the VR sensor on cranking, is that enough? I've read on here that it should be about 2.5VAC I've changed the polarity of the sensor and it stopped sparking so I'm assuming its right. Is there any way to increase the voltage from the sensor? Or if it is sparking, does it not need any more voltage?

I've tried checking the timing but my Gunson timing light doesnt seem to work, I dont get a flash when connected to the HT lead for cyl 1, I understand that wasted spark can confuse some timing lights?

The firing order is 1-4-3-2 so I've got 1 & 3 connected to 1 coil, and 4 & 2 connected to the other. I have swapped them over as well incase the coil wiring is incorrect.

I've had the engine running briefly, but very badly, I'm assuming on only 2 cylinders because it wouldnt idle at all. Since then, nothing.

I gave up last night because I think the engine had flooded. I have checked the resistance of the coil, but I'm not sure what I'm looking for there and it sparks at the plug so something is happening!

Anyone got any ideas?
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Jadewombat
Posts: 1447
Joined: Sat Jun 22, 2002 12:01 am

Re: EDIS Spark/Fuel but non-starter :(

Post by Jadewombat »

Is there a popping sound in the intake? If so, try swapping the 10 and 12 wires on the EDIS module.

viewtopic.php?f=63&t=139125
63 Bug
Posts: 40
Joined: Sun Jan 25, 2004 1:33 pm

Re: EDIS Spark/Fuel but non-starter :(

Post by 63 Bug »

*UPDATE*

I had another look at it tonight, re-gapped the plugs and checked all the connections on the EDIS. I refitted all the plugs except one and checked the HT leads were connected correctly.
I tested a spark plug. No spark. I'd used an old plug before that wasn't a resistive one and it worked ok, but the resistive plug I took out the engine didn't spark, I pulled another one and that didn't work either.

So it looks like the plugs are shot. I used them with MSD before, I don't know if that's what bust them.

I also managed to get the timing light to work using the old plug.

Hopefully a new set of resistive plugs should sort the problem and I'll have it running tomorrow!
63 Bug
Posts: 40
Joined: Sun Jan 25, 2004 1:33 pm

Re: EDIS Spark/Fuel but non-starter :(

Post by 63 Bug »

It lives!

Turns out it was the spark plugs.

Onwards and upwards.... :)
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