VK stopped running with new spark plugs
Hey guys, got a quick question for you.
Today I took the spark plugs outta the old VK, they were knackered. Burnt to a crisp haha. So I went out and bought 6 newies, chucked 'em in there and now the car won't start. Why would this be?
Also, if the old ones are black does that mean I possibly have a blown head gasket?
Cheers, Matt
Ecotech Power
Did you change them one at a time?
Any chance you have put the leads in the wrong spot?
Were they gapped properly?
Does the car run with the old ones back in?
Originally Posted by alien
Blues Brother # 2
Most of the time you know that the head gasket is gone is if you get lots of water buildup in the exhaust (if someone could correct me on this)
No I changed them all at once, what difference would it make if I'd have changed them one at a time?
No, the leads are definitely in the correct spots.
Um, shouldn't they come gapped correctly straight out the box? If not, chances are they aren't.
And I haven't actually tried running the car with the old ones back in. Maybe I should do that tomorrow.
Cheers, Matt.
Searching for the billion
first check that you have spark before you switch them all back. you probably blown a fuse or bumped something.
Ecotech Power
By changing them all at once, the coil can leak electricitiy, which it is now most likely ran out of, hence its not working.... ok Im talking shitJust its easy to mix up the leads when changing them all at once.
Sweet
They SHOULD be gapped correctly, not always the case, but unlikely all would be shut.
Follow Greenacc advice first, as its more likely the case, but it is possible the new plugs arnt firing under compression, again highly unlikely to be the case for all plugs so doesnt explain it.
+1, Listen to him, hes smarter.
How exactly does one go about checking spark?
Cheers fellas, Matt
Blues Brother # 2
Take one spark plug plug out leave it connected to the lead and crank the car, you should see a spark on the end.
Just checked, am most definitely getting spark from the plugs.
Whats next on the list of things to try?
Rollin
what colour is the spark mate?
you need 3 things for a car to run fuel, spark and air
Ecotech Power
If theres a visual spark with the new plugs, you could try the old ones, might be wasting your time, but eliminates the new ones, since thats what you changed.
Is it Carby or EFI?
It's carby.
There is definitely a visual spark with the new plugs, and when they're in and I turn the engine over, there's a lot of popping out of the exhaust pipe.
Blues Brother # 2
So if you take the Air filter off and look inside the carby when applying the throttle, do you see petrol shooting in?
check your firing order again bro, popping out the exhaust could be the order is wrong and its sparking the fuel when exhuast valve is open, is there any backfiring through the carby?
There is definitely petrol getting through the carby.
Goodness me this is getting annoying :P
I've checked the firing order many times, however I'm ready to admit that I may be wrong.
Let's see. The firing order is 1-5-3-6-2-4 if I'm not mistaken. This means that the first lead from the dizzy goes to cylinder number one, closest to the front of the engine. Then lead number 2 from the dizzy goes to the fifth cylinder. I'm doing it right so far aren't I?
Blues Brother # 2
So you have fuel and spark. Have you made sure that you pressed the gas* pedal 3 or more times before cranking and reapeat that a few times. You can also try spraying that instant start stuff to help it out.
The firing order that you wrote down is correct so as long as you have plugged it in right you wouldn't have any problems (which it sounds like you are doing everything right).
Also you might want to charge the battery a bit if the above still does not work, you might be getting to little voltage from it and the car doe snot have enough to start now (esp. after all that cranking)
* CBF to spell the other word
The battery is flat as so I've been jump starting it using mum's car.
You reckon spraying some aerostart or 'start ya bastard' into the carby may bring it to life?
Still, what could possibly explain all the popping and rubbish that comes from the exhaust as I crank it over?
Cheers, Matt
Rollin
check if the dizzy is on top dead centre as sometimes they strip the gears off the cog and it might have done that,
so pull number one plug out put on top dead centre and make sure the piston is up (use a screw driver) and then check the dizzy if number 1 is in the right spot.
can you turn the rotor button with your hand should only move a little bit
Rollin
or you could just put it on top dead centre pull the dizzy out and look at the cog on the dizzy might be easier to do it that way but then you have to do the timing which isnt hard
Blues Brother # 2
Not sure what that may be but it does sound like its about to start for you but juuust does not get there. Also have you tried the old spark plugs? and are all the leads on properly i'd double check that they are all clicked in to place if you haven't already.
The "start ya bastard" would be worth while to try. It helps me out since i don't start my car until the weekends and it does not like sitting there for a week. It takes me a quite a few goes (but weather was colder at the time too, it starts faster now).
The Lion will never Die!
are you sure what you think is number 1 is number 1, on the dizzy cap that is, I'm sure you know where it is on the head as you said
Rollin
just put it to top dead centre it will tell you where its meant to be on the cap
Blues Brother # 2
What he said ^^^
Also correct gap for the spark plugs should be 1.5mm, just incase.
Yeah the cap has numbers 1 to 6 on it, so I'm sure of the terminals.
As for the top dead centre, how do I actually determine whether it's TDC or not? Isn't there 2 times during the cycle when the piston is up or down? I'm not real cluey about this kinda stuff.
And yeah, got all the gaps right, checked it today.
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