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Old 02-28-2008, 09:07 PM
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Lack of power, turbo issue and high idle

Hi new it this forum, here's the stats
1999 Ford E450 7.3 Powerstroke Turbo Diesel 16' cube van

The issue I'm having is lack of power. I can hear the turbo working and yet I'm lacking alot of power. It kinda sound like air escaping, I'm thinking the waste gate might be stuck

As well when I leave the truck idling, it will always overrev untill I apply the brake or press on the gas. after about ten second it will start to rev again.

appreciate the help in solving this!!!!
Hate spending my hard earned money at a garage!
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Old 02-28-2008, 09:12 PM
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overrev as in rev high and stay there or bounce around up and down?
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Old 02-28-2008, 09:15 PM
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what kind of RPMs is over rev? and does the turbo sound you are refering to go away after warm?
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Old 02-29-2008, 06:22 PM
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It sounds to me like your psd thinks its cold...The high revving is probably the engine running at high idle. It should return to normal when the brake or go pedal is pressed. The no power and sounds like air escaping is possibly the ebpv. It also closes when it cold to help the engine get to operating temp quicker. It could be stuck closed if the sound does not go away after a couple minutes of driving...Just my thoughts on the matter....Rod
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Old 03-01-2008, 03:33 PM
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Over rev as in if it usually idles at 700 rpm (guessing) then it would idle constantly at 1200 rpm

and the turbo sound is continuously there!
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Old 03-04-2008, 08:51 PM
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ebpv valve

On cold mornings letting my truck (2000 f-350 7.3 P.S.D. turbo) warm up while sitting and idling the ebpv valve closes and gives you what sounds like a exhaust backpressure noise, idle increases about 3 to 5k in r.p.m , along with that you hear a noise in the engine cabin which could be described as a huge vacumn leak noise. Thats the ebpv valve operating the ebpv is designed to help that big hunk of metal under the hood warm up as it performs better warm.. I think you said your from Nebraska where it gets real cold!!! See if it happens at ambient temps above 60ish degrees or higher or when warm.. I think what your refering to as turbo noise is backpressure noise caused by ebpv valve.. Lots here on forum about ebpv diagnosis..If your hearing your turbo whine between 700 and 1200 r.p.m. I think thats a bad thing..
Good luck

Last edited by dumokie; 03-04-2008 at 08:59 PM. Reason: added more
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Old 03-05-2008, 10:25 AM
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Problem Solved

Ok here's it goes.....
MAP sensor, the nipple broke off the sensor.

Ordered a new one from the dealer at a cost of $145.00 and glued the old on in the mean time
Now it runs like a champ!!!!

I did however check the EBPV, while driving (very loud experience driving with out the dog house on!!!!) and it seemed to work perfectly!!!!

Tks for everyone's help
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