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What's wrong with these plugs? 

 

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 Post subject: What's wrong with these plugs?
Posted: Wed May 20, 2009 9:25 pm 
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What's wrong with these plugs?

There is black soot (carbon?) build up around the tip.

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 9:36 pm 
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Um dude, retake the photo's in macro function on a decent camera and we'll tell ya.

Can see much past the blur, they look a little to hot to me, although hot and black dont go together. Is the black on the centre electrode, ground electrode, thread?

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 10:46 pm 
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meh, they're brand new.

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 10:53 pm 
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The car is stalling when you switch from Petrol to LPG while the engine is still running.

I thought it might be the spark plugs.

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 10:58 pm 
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Hold the rev's up when changing, its a pretty hard task to change from liquid to vapor with 500rpm to spare.

Or change when in motion.

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 11:08 pm 
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Yes, I do that and it works.

However it didn't do this before.

It only happened once I took it to Automasters so I was suspecting it was the plugs.

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Wed May 20, 2009 11:35 pm 
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Did they change the plugs?

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Thu May 21, 2009 12:11 am 
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Yes, Automasters changed the plugs to Bosch Super Plus.

So I went to Titan Ford today and bought genuine Motorcraft/Denso Spark Plugs.

It is still stalling when I switch from petrol to LPG.. BUT when I start the car on Petrol there is a much stronger and solid (better) starting sound with the genuine plugs.

 

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 Post subject: Re: What's wrong with these plugs?
Posted: Thu May 21, 2009 3:11 am 
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Read here, under spark plugs: http://www.fordmods.com/ford-4l-and-6-cylinder-f1/great-reads-t78685.html

Problem solvered :)

 

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