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1994.5 - 1997 7.3L Power Stroke Diesel  

Low Boost Readings

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Old Dec 15, 2006 | 06:23 PM
  #1  
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turtlecrawler
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Unhappy Low Boost Readings

I HAVE A 1996 FORD F-350 PSD. I am new to diesels but not to working on trucks and rockcrawlers. I installed gauges in the truck EGT,TEMP, BOOST. I tied into the MAP sensor for the boost readings. I'm only reading 5-10 psi. I would think it should read about 20-25 or better am I wrong? The truck has a GARRETT TURBO,4in EXHAUST,90 hp CHIP AND COLD AIR INTAKE. Please help a guy out....thanks
 
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Old Dec 15, 2006 | 06:59 PM
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From: Marietta, OH/Weirton, WV
Check for leaks in your tubing and fittings, and if you used a "T" into the map line then check the map line for cracking.
------------jeremy
 
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Old Dec 15, 2006 | 07:33 PM
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During what driving conditions are you seeing those boost numbers??
Just crusin 70 mph those would be normal.
 
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Old Dec 16, 2006 | 12:01 AM
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At 70mph there is almost zero boost. When I hammer the throttle it seems to move out fairly well, not much smoke. However all these mods were make to the truck before I owned it. I don't know what to except. Iv'e only added the gauges, changed all the fluids.
 
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Old Dec 16, 2006 | 09:29 AM
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@ 70 mph flat driving you should see 2-4 lbs. Maybe up to ten when you put the throttle down. Now if you kick it out of overdrive and mash it you should be able to get it up to 15-18lbs when your close to 3000rpm. If your not seeing thsi I would start were Jboard lead you. Check for leaks in your boost lines and fittings.
 
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Old Dec 16, 2006 | 09:38 AM
  #6  
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I checked my hose clams in the turbo y downpipe, the were a little loose, from time, I tightened them and saw a significant increase in power.
 
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Old Dec 17, 2006 | 06:35 PM
  #7  
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Smile Great helpful people

Thank for the tips guys. I'll try all of them. I went by Elite Diesel on SAT. They were closed, but a young man named Brandon was there and willing to very HELPFUL on his day off. We attempted to solve the problem, yet were unable to do so. He told me he was better with chevys than FORDS but still tried to assist me. I will be going back on MON. to speak with Tad who is their ford guy. Hats-off to the crew at ELITE in trying to help a newbie to the world off diesels.........
 
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Old Dec 19, 2006 | 11:47 PM
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From: Northwest AZ
Is your gauge sensor electic or mechanical? I have an aftermarket turbo and at 70mph my gauge reads 8 psi. If I mash the throttle I can hit over 30 psi. The stock turbo should easily hit 17 psi when at hard throttle.
 
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