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Old 08-05-2012, 05:49 AM   #1
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Exclamation problems with ford damon callenger 1995 460

HI my motorhom starts and ticks over fine but under load it will misfire and loose pawer i have changed spark plugs ht leads disy cap coil oxygen sensor one of the temperature sensors every thing i do seems to make some improovment but has note solved the problem also to ad it runs the same on lpg.
Please help Phil.

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Old 08-05-2012, 06:12 AM   #2
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First: Have you pulled codes?
How many miles on it?
Plug wires would probably be a good idea if they are older.
Have you checked for a vacuum leak?
Have you verified what the timing is set at?

Bob Kulhanek 1995, 29 ft, Coachman Leprechaun, Ford E-350, EFI 460, 4.0 Onan Gen

If it won't budge, hit it harder or get a bigger hammer.
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Old 08-06-2012, 01:39 PM   #3
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When was the last time the fuel filter was changed? From what you've described those are the symptoms of a dirty filter.
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Old 08-06-2012, 01:41 PM   #4
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Originally Posted by easywind View Post
When was the last time the fuel filter was changed? From what you've described those are the symptoms of a dirty filter.
Don and Mary
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Old 08-06-2012, 02:30 PM   #5
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Hi Phil and Welcome to the Forum.

Did I understand your last statement correctly - that it has the same issue running on LPG (propane) vs. gas? If so, then that rules out fuel filter or fuel pump. You don't say exacly which sensors (other than O2) you've replaced (MAT, MAP, TPS).

Have you seen the Check Engine Light come on while it is acting up? You should really try checking for trouble codes before throwing more money at it. Since your engine systems are pre-OBD-II you'll need a Ford specific code reader. This is a good one to get and not expensive either. You might find it locally for a few more dollars.

Amazon.com: Equus 3145 Ford Digital Code Reader: Automotive

Another possibility is a failing PIP sensor inside the distributor which is a pain to replace since the distributor must be torn down to get to it.

Good Luck and let us know what you find.
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 1997 Jeep Grand Cherokee "toad"
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Old 08-07-2012, 02:14 PM   #6
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Hi thanks for all your responses.
I have not pulled the codes as we live in rural France and it is not possible to get anyone with the kit to do this.
The motor home has done approx 45000 miles.
I have changed the plug leads, spark plugs the rotor arm, distributor and coil and the ignition module.
Also the O2 sensor, one of the temp sensors and air filter.
I am not sure when the fuel filter was last changed.
In the manual the timing is set and cannot be adjusted.
I have checked for vacume leaks.
Does anyone know of a code reader stockist that will post to France?
My RV has a fuel injected engine.....does this make any difference?

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