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Noob question. 3.9l EA seems to be missfiring. 

 

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 Post subject: Noob question. 3.9l EA seems to be missfiring.
Posted: Thu Dec 10, 2015 10:21 am 
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I'd like to start off by saying when it comes to mechanicals i don't really know much at all. In saying that here goes lol.

So my car has devoleped what i believe to be a missfire as of late.
When idling it seems as though the engine is shaking randomly every 5 or so seconds.
I'm uploading a video to youtube at the moment and ill pay a link as soon as it's up.

I've changed the spark plugs and while it starts easier the problem still remains.

Also, on what may or may not be an unrelated note.
Image

Image
This pulley ( which i believe is a tensioner ) has fallen off (bolt broke).
Could this be the source of the problem?

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Thu Dec 10, 2015 10:58 am 
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Youtube vid of the car running funny.
https://youtu.be/8WoePH--Azg

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Thu Dec 17, 2015 1:27 pm 
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Dissy cap and rotor button. Make sure to replace them with a Bosch part.. The fuel miser stuff is rubbish.

Those leads look like they've had a long life too.

Make sure base timing ignition is set to the "IGN" mark.

The pulley is just an idler for the air-con..

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Thu Dec 17, 2015 2:28 pm 
Parts Gopher
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That involves pulling almost everything off the left side of the block doesn't it? :(

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Thu Dec 17, 2015 2:58 pm 
Stock as a Rock
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Nah. It's tight but with some persistance you can can the job done.. Tho it could be a good time to just replace the intake gasket..

2 birds 1 stone an all that.

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Sun Dec 20, 2015 1:17 pm 
Parts Gopher
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EAfalconS wrote:

Make sure base timing ignition is set to the "IGN" mark.



Where can I find the IGN mark? Or is the a guide or anything on how to change it over properly?

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Sun Dec 20, 2015 1:36 pm 
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It should be marked on the dizzy.
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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Sun Dec 20, 2015 1:46 pm 
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Sweet. Thanks for the quick reply. Will be doing this as well as getting new tires tomorrow. Woo

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Mon Dec 21, 2015 1:17 pm 
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What i meant was to make sure your ignition timing is set correctly one you get the previous jobs done.

In your second image you can see the TDC and IGN timing marks.
The timing needs to be correctly set at the IGN mark.

 

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 Post subject: Re: Noob question. 3.9l EA seems to be missfiring.
Posted: Mon Dec 21, 2015 1:21 pm 
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Ok. Thank you for the Clarification. I'll go through the book and follow the instructions in there. Thanks!

 

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