No Spark :(

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do0zy
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No Spark :(

Post by do0zy » Wed May 21, 2014 3:27 pm

Hey guys,
I was hoping you could offer me some advice...

The car started fine this morning, I went to try and start it this afternoon and it now has no spark.
I've checked the following:

-Spark plugs - no spark
-Distributor cap - cleaned contacts
-Checked all leads and connections to dizzy
-Swapped coil
I have checked to see if the coil is getting an power by using a voltmeter on the +ve and -ve terminals on the coil, nothing is being picked up.

Where do I go to from here? the battery has plenty of charge, i've checked all the fuses and swapped out the green relay switch, i'm stumped.

n12et_exa
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Post by n12et_exa » Wed May 21, 2014 6:20 pm

check the earth loop in the reverse light plug and the fuseable links

do0zy
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Joined: Fri Sep 14, 2012 10:07 am

Post by do0zy » Wed May 21, 2014 9:02 pm

I can't seen anything obviously unplugged in the reverse light loop. I can see two fuseable links in the engine bay (one is green and one is grey) I swapped them over from my donor car - still no luck. I will check the fuse box and the larger square fuses on the weekend. Thanks for your help!

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Damo
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Location: Canberra

Post by Damo » Thu May 22, 2014 6:00 am

Are you sure there is no spark? What did you do to determine this?

Does the fuel pump prime when you crank the engine?


Damo
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do0zy
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Post by do0zy » Thu May 22, 2014 7:48 am

I tested the spark by holding it with some insulated pliers just above the rocker cover and getting a friend to start the car - I tested all spark plugs.

I worked backwards from there...
I can hear the fuel pump priming, all other electrics seem fine.

Should the coil have a voltage reading from the +ve and -ve terminals?

do0zy
Posts: 10
Joined: Fri Sep 14, 2012 10:07 am

Post by do0zy » Thu May 22, 2014 5:48 pm

I took out and checked every fuse, tried turning the car on and it started. I left it running for 10mins, switched it off and then when I tried to turn it on again it wouldn't start. I didn't touch anything while it was running.

Very strange...

I haven't got a spare battery to try, but it is reading between 12 and 13 volts on the volt meter.

I tested the coil:
the primary resistance was at 2.0 the specifications are 0.84 - 1.02, could I higher primary resistance cause this issue?
the secondary resistance was at 11.4 the specifications are 8.2 - 12.4

n12et_exa
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Post by n12et_exa » Thu May 22, 2014 9:15 pm

just for shits and giggles try another dizzy if you have one i reckon the cas has shat it self so apart from havi ng no spark you will also not have an injector pulse

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tassuperkart
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Post by tassuperkart » Fri May 23, 2014 9:33 am

What HE^ said.
id say you have a failing CAS.
They are available new anywhere that sells EFI components and online.

Oracle
Forcd4 wrote:Oh fuk no dude it's you a again, the oracle.

do0zy
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Post by do0zy » Fri May 23, 2014 9:37 am

Thanks for the help fellas.
A couple of questions,

-If the CAS had failed, wouldn't the coil still be showing a voltage reading?

-Above the fuse box there are some circuit breakers. Are they reset a certain way? or, let's say there is a shorting somewhere, would the circuit breaker reset itself when the shorting was fixed?

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tassuperkart
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Post by tassuperkart » Fri May 23, 2014 11:30 am

It will but are you checking BETWEEN -ive and +ive? You wont get anything there.
Ignition ON and check between +ive and ground.

Circuit breakers above the fusebox?? Never seen them. Cant be stock unless ur confusing the row of power relays there for circuit breakers.

Oracle
Forcd4 wrote:Oh fuk no dude it's you a again, the oracle.

do0zy
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Post by do0zy » Fri May 23, 2014 8:02 pm

Awesome tas,
I tested the coil correctly and it was displaying between and 11 and 12 volts.
The circuit breakers were relays...

I gave my other distributor a good clean, installed it and the car started :)

Thanks everyone for all your help :)

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