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Old 03-25-2014, 12:41 PM
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low boost but no smoke

First time poster long time viewer.about a month ago i picked up a late 99 7.3 f250 with 170,000 miles. 4 inch exhaust, AFE intake and a edge juice with attitude programmer.(edge is a pos and I hate it.) I was reading some threads and noticing that most people get up to 20 psi boost pressure or higher in there nearly stock trucks. My problem is I have never seen more than 9psi. The truck seams to run OK but not perfect yet. It doesn't blow exsesive smoke when I get on it no matter what power setting. I removed the 4 intercooler boots and cleaned them up really good along with the pipes they sit on and now they seal perfectly. I am not sure if I have anymore leaks and stopped looking due to a new thought. The turbo spools loud and sounds great but I'm not getting much boost to the motor. If this was the case wouldent I be rolling coal every time I mash on it? I don't drive it lightly and would think making 9 psi on a huge hill trying to maintain 40 mph with my foot barried in it I would be throwing big clouds of black smoke. Egts look good. About 750 800 on above mentioned hill.
Could it be a sensor? Not getting the fuel needed to make boost? I'm lost. This is my first 7.3. I whent from driving a fully mechanical 93 gmc 6.5 td to this ford f250. And honestly I'm not impressed yet. It deals completely guttles all the time. That old 6.5 was a rocket com paired to my new 7.3 and from what iv been reading that shoulb be the other way around. Any help is great. Thank you guys.

Also there is a noticeable knock that Adams to be getting worse on the drivers side. What could this be other than a pushrod or messed up valve?
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Old 03-25-2014, 01:17 PM
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the knock your hearing is probably injector knock from the long lead injector.

it sounds like you either have low fuel pressure or oil pressure.

fuel pressure relief could be worn out, weak fuel pump. need a gauge to check.

can pull the icp connector off, if oils coming through replace it.

then you could also replace your ipr, it could be malfunctioning not giving enough oil.
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Old 03-25-2014, 04:09 PM
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What is the ICP and where is it located? And the IPR where and what is that? Sorry I'm new to all these electronics and sensors
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Old 03-26-2014, 11:39 AM
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Quote:
Originally Posted by blue99stroker View Post
the knock your hearing is probably injector knock from the long lead injector.
being a 99, he has all AD's. The L.L. injector IS suppose to cure the knock. i got a L99 and it bangs away..(all ad's).

OP....you gotta leak/s bud. Look up boost leak detector and make one. Inspect your uppipes..(pipes that feed the collector, behind the turbo), look for black markings/soot on pipes, collector and firewall. If so, need new ones. Rockauto sells the dorman (crossover pipes) for 180 buks. You may want to replace ALL the cac boots with a/m ones...riffraff, dieselsite..etc. and get new T-clamps, not the worm clamps that are are on ther now. Also, may want the riffraff billet plenum inserts, so you can REALLY crank down on the plenum boots
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Old 03-27-2014, 10:45 AM
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Just ordered new plenum boots, clamps, and plenum inserts from rifraff diesel. Just under 100 bucks. Not to shabby. Hopefully I'll make some real boost. The boors on there now have about 1/4 inch of nasty soot on them and everything around them is completely caked. If this doesn't fix it I'll look into fuel delivery problems. I figure even if this isn't the fix it needs to be done anyway. I'll keep y'all posted. Thanks for the help.
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Old 03-27-2014, 10:46 AM
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Can I quiet the knock down at all somhow? Makes my truck sound like ****
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Old 03-27-2014, 10:49 AM
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FRX and HPX have been used to help, but if it's not broke/issue with it then not much.
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Old 03-27-2014, 12:09 PM
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What's is frx and fpx?
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Old 03-27-2014, 05:53 PM
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Quote:
Originally Posted by powerstrokin'99 View Post
What's is frx and fpx?
frx and hpx can be found at riffraff as well. If not done yet, do the hutch mod..(guzzle diesel site). Makes a world of difference
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