4K-C Ignition Issues

[raceflorolla]

Hey guys,

 

Usually i work out most of my problems in regards to cars not running. This time i'm a bit stuck, thought someone might have another point of view on the subject.

 

Story goes as follows... i parked my ke70 in the backyard before leaving on a 10 month road trip.

 

Came back today to try and start it. Blew out the cobwebs, cleaned the air filter, checked the fuel filter, replaced the spark plugs. Tried turning it over but nothing happened.

 

So i checked for spark which there was none so i started trying to isolate potential problems. The dizzy cap looked a bit worn so i sanded back the contact areas, made sure the rotor looked ok.

 

The points were pitted badly so i replaced them along with the condenser. Adjusted the points, but still nothing.

 

Decided the condenser and ballast resistor looked a bit suss so decided to replace them to try and narrow down the options.

 

After all this i still have no spark and confused as to what I'm overlooking.

 

The only thing i just thought of now is the lead from coil to dizzy could be gone. Will check it tommorrow with the ol multimeter.

 

Anyone got any ideas or can see something ive overlooked or forgotton?

 

Any info, tips would be muchly appreciated,

 

Cheers lads

 

Sam

[altezzaclub]

Is there 12v at the coil?

[raceflorolla]

Yes there was. Sorry about the late reply. I found the problem it was the wire between dizzy and -ve side of coil, post by taz_rx made me check this. Got the car started but i has an irregular idle. Checked each plug and they all seem to spark inconsistantly so ive come to the conclusion that it must be dizzy related or points? Not too sure

[GJM85]

Is the point gap correct? Should be 0.45mm

Timing? 8-10 deg advance

When the car is running feel around the terminals of the distributor cap. If you get shocked its a cracked cap.

[raceflorolla]

Checked point gap, spark gap, adjusted timing.

Replaced the dizzy cap.

The car runs but sounds like it's missing at regular intervals. When i hold the timing light you can see it flicker but occasionaly it drops a spark every now and then. Checked the resistance of the leads,

Coil to dizzy 13.8

Each plug lead between 3.6 - 4.6 are these readings showing the leads are faulty?

Think i read on here that you should get resistance of ~20.0 to 200mm of lead? Is that correct?

[GJM85]

I'm thinking your dizzy is a tooth out.

[raceflorolla]

Hmm quite possibly. Once its running the timing light show its about 40deg advanced and if i try to take it back to ~10deg it dies. Ive lost my manual from years ago so I'm going off the top of my head at the moment. I found TDC aligned rotor and dizzy and put it in. Only prob i have with that is I'm not sure of the exact position in which to put the dizzy down in. Previous cars ive had they have a mark on the dizzy and block that you line up but can't see to find it on the ol 4k.

[GJM85]

Firing order is 1342.

Before you pull the dizzy out...

Looking into the engine bay, the rightest frontest :) terminal on the dizzy is number 1 and they go round.in the above order. Score a mark into the dizzy body using that number 1 terminal.

This is your tdc mark.

Set the crank timing mark to zero. Check the dizzy rotor is in the general direction of that number 1 terminal.

Pull the dizzy out and drop it back in until you can get the rotor to line up with that score mark and you should still have adjustment both ways.

It can be tricky and you'll need a long flat head screwdriver to turn the oil pump so the key on the dizzy drops in properly.

 

[Taz_Rx]

Nfi of post in question but glad I could help.

 

Will it just not idle with 10°? If you can get some one else to hold some revs on while you knock it back and it revs ok, maybe your lack of idle requires some carb adjustment too?

[raceflorolla]

Yeah i have the timing set right, at TDC, crank at 0° the rotor points at No.1 terminal. I'm sure i had it a tooth out couple of days ago, ran like a pig.

 

Got it to idle this morning, now adjusted back to ~10° it runs for about a minute before it dies and has lack of power down low. While it idles if you put your foot flat it coughs and splutters then rev's up. Might have blocked jets in the carb, the fuel has been sitting there for 9 months.

[Taz_Rx]

Yeah if its running with 10° and the points are set ok put a little but of attention into the fuel side of things.

[GJM85]

Definately fuel issues....

[raceflorolla]

So siphoned the fuel from the tank, added new stuff. Replaced the fuel filter, stripped the carby down gave her a clean. And what do ya know it works.

Stoked. Thanks a lot guys for your time in helping me sort it and responding. Learnt a new thing in the process, 9 month old fuel doesnt do wonders