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Old 12-08-2011, 05:26 AM
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New to the site... question 99 F350 7.3 liter

History... 99 F350 7.3 liter... purchased it from a one owner 260k miles... I have had it for 10,00 miles.. and have had to replace crank shaft and cam shaft timing sensor..

Warm weather it runs like a champ.. rain comes and it will shut off at a stop sign... and sometimes will skip like its the cam shaft timing sensor again..

During colder air temps it will accelerate fine... then when it gets to running rpm it sounds like the turbo tries to kick it and it bogs.. .I accelerate again and it smooths out.. then when returning to cruise idle it does the same thing...

The previous owner put an aftermarket K&N air filter on it... Can this be the cause for both issues? Will it help if I return to a standard air filter.. I haven't cleaned the K&N yet so that is in the works..

I am a new deisel owner so trying to make sure this trucks lasts me a long time... It is the one I have wanted for years.

Comments welcome... Thanks

TC
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Old 12-08-2011, 05:33 AM
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I also have the receipt from the new filter that was installed just before I purchased it.
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Old 12-08-2011, 07:36 AM
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Quote:
Originally Posted by Tomcatmc5 View Post
History... 99 F350 7.3 liter... purchased it from a one owner 260k miles... I have had it for 10,00 miles.. and have had to replace crank shaft and cam shaft timing sensor..

Warm weather it runs like a champ.. rain comes and it will shut off at a stop sign... and sometimes will skip like its the cam shaft timing sensor again..

During colder air temps it will accelerate fine... then when it gets to running rpm it sounds like the turbo tries to kick it and it bogs.. .I accelerate again and it smooths out.. then when returning to cruise idle it does the same thing...

The previous owner put an aftermarket K&N air filter on it... Can this be the cause for both issues? Will it help if I return to a standard air filter.. I haven't cleaned the K&N yet so that is in the works..

I am a new deisel owner so trying to make sure this trucks lasts me a long time... It is the one I have wanted for years.

Comments welcome... Thanks

TC
IMHO, I would start with getting rid of the K&N, as they let too much dust get by and can cause the turbo and/or engine to get "dusted" causing a blown turbo and/or loss of compression.

It would b e a good idea to pull off the intake tubes, too, and check the turbo wheel for damage, and shaft for play. (In/out or side to side.)

As far as the cam sensor, it's about $30 from Ford, but only use one from Ford or International (for a T444E)

Other than that, it might be a good idea to find someone with a good scanner, (generic OBDII doesn't work on these trucks) to check for stored codes.

Doe it ONLY have issues when it gets wet?

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Old 12-08-2011, 08:54 AM
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Okay, I am in full agreement with the K&N... I will work on that... Before the new Cam Sensor it would do it randomly... after the sensor it only done it when it was raining.

I have a good mechanic with a good scanner...

After this week, I will put it back in the shop for some good cold morning running which should show the codes.

Thanks for your reply...
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Old 12-08-2011, 09:05 AM
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What kind of cam sensor did you put in it?

Did you inspect the wiring harness/plug for the CPS when you installed it?

Maybe try some dielectric grease in the plug itself?

The only other common "rain" problem that is common that I can think of is the window seals are known to go, leaking water on the fuse box and/or GEM module or PCM. Check out under the dash next time you have issues for any signs ow water.
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Old 12-08-2011, 10:31 AM
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Thanks brother... I will check on that.. and as far as the brand goes I am not sure... He has been a very good mechanic on my Dad's 89 F350...

and I will check on the leaks.... Thanks,
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Old 09-26-2012, 12:38 PM
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Diesel is fixed...

The best advice I had was to put a Ford cam shaft sensor back on the truck. It was the aftermarket sensor making it stutter and quit in the rain. She runs like a champ now wet or dry.

Thanks everyone.
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