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03 Ghost aka power problem

 
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  #1 (permalink)  
Old 09 Feb 2013, 03:58 pm
Young Cruiser
 
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Default 03 Ghost aka power problem

To start with, I am working on an '03 Base model automatic.

It seems I am chasing a ghost, an electrical ghost, or maybe it is just a symptom. Looking for some input.

What is happening is that when any of the accessory fans engage (heat, AC, or rad), it pulls the RPM down about 150-200. At that point it will start idling rough until the rad fan kicks off. If the engine is revved to maintain the RPM pull-down it throws the CAM sensor code, I know that it will throw this code if it drops below 5V, so I think this is a false code.

Reading some of the other threads, it seemed like it could be a problem between the battery-generator-camshaft sensor, so I pulled those today and inspected them. Did not see any problems, BUT, after re-assembly, it made the problem worse. Almost pulls-down far enough to stall.

Maybe it is an INAC problem? But that does not explain the pull-down from electrical accessories.

Any ideas would be appreciated, I have been searching the forums heavily in the last three weeks looking for ideas/solutions. Throttlebody is clean, plus and wires are fine, new battery...
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Old 09 Feb 2013, 04:07 pm
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Default Re: 03 Ghost aka power problem

Make sure you have both speeds on the cooling fan. You may also clean the idle control on the TB.
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Old 09 Feb 2013, 04:13 pm
Young Cruiser
 
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Default Re: 03 Ghost aka power problem

?
I will give a try to taking the IAC mounting apart I guess and see.

Edit: IAC not INAC

Last edited by Caustic; 09 Feb 2013 at 04:30 pm.
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Old 16 Feb 2013, 02:23 pm
Young Cruiser
 
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Default Re: 03 Ghost aka power problem

I have attached image sequence for removing and re-inserting the IAC.
Basically, remove the torx, thumb on the edge where the bolt was and twist clock-wise. This will loosen the seals and allow you to pull it out.

Reverse the order to put it back in.

This did help the rpm pull-down, but not the idle issue.
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Old 21 Jul 2013, 02:12 pm
Young Cruiser
 
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Default Re: 03 Ghost aka power problem

I need a few thoughts/ideas.

Pulling the relays and fuses I found that the center wire (black) on the pcm side is showing a 22ish Ohm short to battery positive. This seems a very strange stage with the relays and fuses pulled.

Can anyone else quickly meter their fan connector between positive?

The battery is being drained in under a week, so there is a short somewhere and this seems it might be a likely candidate, especially since the previous owner has a bypass switch wired to the yellow wire (you can see the link as i have its cover off).
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Old 21 Jul 2013, 03:41 pm
Young Cruiser
 
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Default Re: 03 Ghost aka power problem

Nope, it is not there. Disconnecting positive from the fuse/distribution box still shows the short.

Edit: Green wire on the same terminal as positive?

Edit: Looking at the service manual, that green eyelet is not supposed to go there. But where does it go? Anyone know?

Last edited by Caustic; 21 Jul 2013 at 04:25 pm.
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Old 21 Jul 2013, 08:38 pm
Young Cruiser
 
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Default Re: 03 Ghost aka power problem

Any ideas on the heavy gauge green wire?

In many systems green is usually a type of ground, but I do not trust that Chrysler/Fiat use that convention.

On the images in the service manual it does not show that wire (it is in the harness with the group of 4 on the left, in the image). It looks to be an original eyelet. Are there supposed to be two on the negative terminal of the starter? Or where does this go? The manual only mentions the one positive connection from the battery.

I really need some input on what to do with this wire.
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Old 23 Jul 2013, 09:41 am
Young Cruiser
 
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Location: On Vancouver Island, BC
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Default Re: 03 Ghost aka power problem

Okay, I found an image of it in the forums:


Does anyone know where this green wire goes? The unconnected Green one above his finger. It is not in the Service manual, and there are various comments about what it is supposed to be connected to (or what it is used by?).

I know it has a resistance path to ground... but it was connected with the positive lead to the starter.

Edit:
Argh ... this shows it connected ... Guess I need to look at what the Green wire is for ... and why it is shorted to ground.



Thank you to luckybadazzboy for the images from his 03-07 swap engine swap !

Edit: It seems the Heavy Green Wire goes to the Alternator.
Quote:
as well as Green lead that goes to the 10 amp fuse link for the Alternator.
from http://www.justanswer.com/chrysler/7...t-cruiser.html

Hmmm, need to test it again then. I had originally wondered if this was the issue but it seemed to be working properly to charge when I measured it about two months ago. But in the off state it is draining the battery? ...

Edit: Thinking on it, I suspect that one or more of the diodes might be failing.

Last edited by Caustic; 23 Jul 2013 at 10:20 am.
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Old 25 Jul 2013, 05:42 am
Senior Cruiser
 
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Posts: 1,256
Default Re: 03 Ghost aka power problem

Caustic; that large green wire is a fusible link [safety] which goes to an even larger wire which goes to the big lug on the alternator. It can carry very high current loads, so the ends must be clean and tight. Insert joke here .......
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