Rough idle, smoke, low mpgs - Ford Powerstroke Diesel Forum
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Old 01-12-2011, 01:45 PM
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Rough idle, smoke, low mpgs

My 95 PSD just rolled over 193,000. Every time I start it, it lopes pretty bad until I step on the go peddle; after that it smooths right out.

The fuel economy isn't the best, on a recent trip I got 14.5 on one tank, and 17.3 mpg on the other. Both were at highway speeds, one with more passing. At one point I got 20/21 mpg.

The last symptom is a good deal of white smoke on cold starts, followed by a time period of some translucent blue smoke.

I recently replaced the GPR and changed the oil. What next? Plugs? Injectors?



Thanks in advance for the help guys!

-Nate
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Old 01-12-2011, 01:46 PM
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*the 20 MPG was just after I purchased the truck...
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Old 01-14-2011, 12:27 PM
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On the bright side I did get a new torque converter, transgo shift kit, solenoid pack and full rebuild for 1000 bones.

Can anyone help with the engine woes?

-Nate
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Old 01-23-2011, 07:41 PM
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The Mileage woes continued this weekend. With an average of around 15.5 MPG. Also noticed a fairly large spot of diesel under the truck this morning. Could it be that these rough starts and poor economy numbers are being caused by a leaking fuel pump or fuel bowl?
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Old 01-24-2011, 05:30 AM
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hanging around for info, I also have a 97 OBS, I think the EBPV is acting up.....
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Old 01-25-2011, 09:43 AM
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Just ordered a full fuel bowl o-ring kit from Guzzle aka DieselOrings.com. Also bought a new fuel pump and all of the hoses and fittings. Hopefully one of these things will solve my leak! Am I on the right track???
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Old 01-30-2011, 06:48 PM
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All is well. I rebuilt the bowl, replaced the pump and replaced all the soft lines. Also blew out the Exhaust Back Pressure valve. I never saw more than 13lbs of boost at wide open throttle before. After getting the truck put back together I can now get 19lbs of boost! I haven't noticed more pep, but the throttle response is a little better.

I don't know what caused the increase in performance, but I am happy with the results! Now to see if the mileage increases. Still the hard starts though.

-Nate

Last edited by MustBurnOil; 02-03-2011 at 01:33 PM.
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Old 02-03-2011, 01:35 PM
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Im out of ideas guys! I still have a leak in the valley. What to check next?
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Old 02-03-2011, 10:46 PM
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check all the fuel lines? theres also a TON of orings on the fuel bowl, which ones did you change??
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Old 02-04-2011, 11:51 AM
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Got the bowl rebuild kit from DieselORings.com, also changed all the soft lines. I didnt change the banjo bolt crush washers, but the old ones didnt seem too bad. Any tips on looking for the leak?
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