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Old 08-06-2009, 15:21   #1 (permalink)
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2005 FREESTAR ignition woes.

First I would like to say hello My name is Jared and I own a 2006 Fusion, recently purchased 2005 Freestar and a 1992 Ranger.

My 2005 Ford Freestar has a very noticeable misfire from idle up to 2200 or so rpm. With no codes. Being that there were no codes my first thought was fuel or ignition coil. Changed fuel filter as it was time anyway and took the coil out. All secondary resistance tested around 10.8 kohms, all primary resistance was around .3 ohms. All within normal range.

What I have done so far.

Replace Fuel and Airfilter
Check coil. = good
Check PCM for evidence of water intrusion. = good
Hooked up scanner and went for a drive.
TPS voltages all normal.
Replaced Camshaft Position Sensor.

Hooked up a timing light to all spark plug wires. Every single cylinder showed irratic flashing. Irratic strobe is present above 2200 rpm. Gets hard to tell around 3500 rpm

The only thing I can figure is something wrong with the Crank Position sensor such as a intermittent short to ground or maybe the PCM is bad.

If anyone has any insight it would be greatly appreciated.


Thanks.
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Old 08-06-2009, 18:10   #2 (permalink)
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Re: 2005 FREESTAR ignition woes.

Quote:
Originally Posted by JaredB View Post
First I would like to say hello My name is Jared and I own a 2006 Fusion, 2005 Freestar and a 1992 Ranger.

My 2005 Ford Freestar has a very noticeable misfire from idle up to 2200 or so rpm. With no codes. Being that there were no codes my first thought was fuel or ignition coil. Changed fuel filter as it was time anyway and took the coil out. All secondary resistance tested around 10.8 kohms, all primary resistance was around .3 ohms. All within normal range.

What I have done so far.

Replace Fuel and Airfilter
Check coil. = good
Check PCM for evidence of water intrusion. = good
Hooked up scanner and went for a drive.
TPS voltages all normal.

Hooked up a timing light to all spark plug wires. Every single cylinder showed irratic flashing. Irratic strobe is present above 2200 rpm. Gets hard to tell around 3500 rpm

The only thing I can figure is something wrong with the Crank Position sensor such as a intermittent short to ground or maybe the PCM is bad.

If anyone has any insight it would be greatly appreciated.


Thanks.




Hello and good day:

WOW You did everything I would have done.

If the Cam or Crank positioning Sensor are gone you should have some type of OBDII Code. and you said you didn't have any.

I will check with a few of the guys here to see if they may have some idea.

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Old 08-07-2009, 17:38   #3 (permalink)
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Re: 2005 FREESTAR ignition woes.

So today I hooked up the scanner again to take a look at the timing while at idle. Spark advance fluctuates between 22 and 28 degrees at 750 rpm.
Seems high for idle. I figured it would be around 10 degrees BTDC at idle.
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Old 08-08-2009, 17:13   #4 (permalink)
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Re: 2005 FREESTAR ignition woes.

Replaced the coil. Still having problem. About ready to take it in.
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Old 08-08-2009, 22:03   #5 (permalink)
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Re: 2005 FREESTAR ignition woes.

Guess as long as I am throwing parts at it. I might try a Cam Position Sensor.
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Old 08-09-2009, 19:40   #6 (permalink)
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Re: 2005 FREESTAR ignition woes.

Quote:
Originally Posted by JaredB View Post
Guess as long as I am throwing parts at it. I might try a Cam Position Sensor.



Did you get any relief on this thing??
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Old 08-10-2009, 18:24   #7 (permalink)
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Re: 2005 FREESTAR ignition woes.

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Originally Posted by Sterling_Six View Post



Did you get any relief on this thing??
New Cam position sensor made no difference.

Next up??

Crank Sensor?
PCM?

Does a dealer have more sophisticated diagnostic equipment that can pinpoint the problem? Assuming that it is electrical or a sensor.
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Old 08-12-2009, 21:58   #8 (permalink)
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Re: 2005 FREESTAR ignition woes.

Took the van to a trusted local mechanic. He has no clue what is wrong. His recommendation was to let it get worse until it throws a code.

I dont think it is going to get worse. I dont think it is going to get better either. I guess I am gonna suck it up and take it to a dealer.
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Old 08-14-2009, 19:12   #9 (permalink)
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Re: 2005 FREESTAR ignition woes.

Fixed!!!

So my wife calls me to tell me the check engine light is on. I get home and get a P305 misfire #5 cyl. So I take out #5 spark plug. The gap was .009!!! So I take out other 5 spark plugs. They were all gaped wrong. but #5 was almost a straight ground.

Not to mention same idiot who replaced the plugs and screwed the gap also put in the wrong type of plugs. So I replaced the plugs with some Autolite platinum's and everything is running fine.
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Old 08-20-2009, 16:33   #10 (permalink)
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Re: 2005 FREESTAR ignition woes.

Glad to hear it's fixed. Spark plugs or plug boots can take awhile to set a code. Thanks for letting us know.
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