B18c4 turbo won't start help!!!


As above, I'd go with the coil. I bought a genuine honda one years ago, think it was around £80.
 
Well after removing the lead side to dizzy found the ignition coil cover cracked all over just totally discentigrated in my hands so I've bought another could should arrive tomos but any ideas where I can get a cover from
 
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No m
Murray said:
A cover? you mean the black cover that the leads plug into?
Click to expand...
no murry this is a cover that goes over the ignition coil, looks like this
 
Here is a post from my thread about how to test a coil.






Well guys I diagnosed the fault and fixed it!

It was the coil, I managed to get one through work.

I tested the new coil compared to the old and the old coil had lost half its resistance! Hence no spark.

To Test...
If you use a multimeter and set it to ohms, put one lead on to the positive or negative terminal and the other onto the output of the coil.
If your coil is good you should get a resistance of around 15.75kilo ohms so that's 15750 ohms.
My knackered coil was 8000 ohms.

I did other tests before this that lead me to test the coil which are as follows.

Remove dizzy cap, rotor arm and plastic housing to expose the coil and hall sensor etc.

First test if you have 12v at the coil, so turn the ignition on. Then use a multimeter set to Volts DC, put the red lead into the positive side of the coil and the black to any chassis earth.
You should get a battery voltage reading.

Second test is to check the negative side of the coil is getting a pulse from the hall sensor.
For this I used an ossiliscope, but you could possibly use a test light with an earth function.
For this test you need to set the ossiliscope to a scale where you can see the waveform clearly, I used a 2-5 second delay on a 20v scale.
Place the black lead to chassis earth and the red lead to the negative side of the coil, then crank the engine.
You should see a waveform consistent peak and trough squarish waveform.

If you need to I can provide pictures of needed.

In my case I had battery voltage at the positive, so I knew there were no fuses gone etc.
And I have a good waveform / hall sensor.

So was all pointing towards testing the coil.

Also in the original post with the multimeter reading of 0.74 ohms is just a continuity check across the contacts.

Sorry for the boring lingo but you never know it might help someone else one day.

Last edited: Jan 25, 2016
 
Well it was Defoe the coil I've just changed it with a brand new part n car started first time, so my nxt question is what can make these parts fail?
 
Age is most common or poor quality part.
Mostly due to age.
 
I've found that if you have the plug leads disconnected from the plugs and turn the car over this kills coils. I did it and a friend has also done it (to build oil pressure/compression test etc). When turning over without firing now I completely disconnect the dizzy from the engine harness and also remove the plug leads. Its as if it builds up energy with no where to go kinda thing.
 
Mine died shortly after a mr frosty (rotor arm cap bolt breaking loose inside the housing)
Id just started tuning EFI at the time and the engine just stopped as i hit 1 bar boost in 3rd, thought id blown it up at the time lol
 
EK9 Matt said:
I've found that if you have the plug leads disconnected from the plugs and turn the car over this kills coils. I did it and a friend has also done it (to build oil pressure/compression test etc). When turning over without firing now I completely disconnect the dizzy from the engine harness and also remove the plug leads. Its as if it builds up energy with no where to go kinda thing.
Click to expand...
Iv had that also happen me , I took out the plug wires to crank the engine to build oil pressure and my coil shat it's self , lol , I learned a lot about dizzys and coils that day ,
So not a big loss in the end
 
jesse888 said:
Mine died shortly after a mr frosty (rotor arm cap bolt breaking loose inside the housing)
Id just started tuning EFI at the time and the engine just stopped as i hit 1 bar boost in 3rd, thought id blown it up at the time lol
Click to expand...
Nothing worse than a Mr Frosty!
 
Leej8 said:
Iv had that also happen me , I took out the plug wires to crank the engine to build oil pressure and my coil shat it's self , lol , I learned a lot about dizzys and coils that day ,
So not a big loss in the end
Click to expand...
Same here, lesson learned Lol!
 
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