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  #1  
Old 07-28-2014, 07:29 PM
cnhtech cnhtech is offline
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Question 97 F350 Power Problems

Hey guys I've got a 1997 F350 with a 7.3 Direct Injection Powerstroke and 5 speed transmission, 2 wd, with 4.10 gears. With no trailer on it, it moves pretty good, but the minute I put our enclosed trailer behind it, it turns into a gutless pos !!! Trailer loaded weights in the 12-14k range. If I hit a hill of any kind of size, I better be going 65+ and turning 2500 or better to have any chance of holding that speed by the top of the hill. I have also noticed on my last trip, which was 2 hours long, that when I got home the passenger side floor board / trans tunnel area was very warm, I had a pair of jeans laying on floor and when I picked them up it felt like they just came out of the dryer.
You guys got any wisdom as to what my problem might be?
The truck is my father in laws, is completely stock, is showing 149,000 on the clock. He got it with around 75,000 on it and has only had to do regular maintence to it ( oil and fuel filter changes).
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Old 07-28-2014, 11:11 PM
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Quote:
Originally Posted by cnhtech View Post
If I hit a hill of any kind of size, I better be going 65+ and turning 2500 or better to have any chance of holding that speed by the top of the hill.
First of all, welcome to FTE. If your trailer weighs that much and you can hold that speed to the top, your doing great!! These engines are gutless stock, so don't expect to much. You can read in my signature and look at what I pull along with my mods and I struggle at times. Mine is about 18.5K and its running great. Downshift a lot and keep the RPM's up and you will do fine. If you don't believe what I'm saying, try that with a gasser!!
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Glenn The Mule-96 2WD F250 EC/LB auto PSD
The Mare 97 dually cc,modified s366 turbo,stage II's,IC,studs,springs,rods,JW auto,4:10 LS,air bags,SD uvch,efuel,FS2500 bypass oil filter,HVHF IDM,IH WP,6.0 trans cooler & rad fan,MBRP 4",SD tensioner,AFE air filter,220 amp alt,38 gal rear tank & 33 gal aux bed tank,aux oil cooler,soundproofed,3 different TS chips,ac cold mod,XS batteries,riffraff hpop reservoir,aluminum radiator,HoneyBadgerJr hpop, water injection
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  #3  
Old 07-28-2014, 11:24 PM
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After a run crawl under and feel if the trany is warm. It might be low on fluid. Or maybe exhaust leak around there? Check your uppipes. And like Glenn said, these trucks stock dont have much power. A intake, exhaust will let it breath a little better.
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Gabe 95 f250 4x4 super cab psd, zf 5 speed, 6637 air intake, scan gauge, stancor gpr, ccv mod, 140v IDM, HPX line, irate t4 mount, s366 turbo, i/c, 3" plenums, Rosewood 238/80 hybrids, T500, studs, springs, rods, DP Tuner f6 chip, diamond eye ss 4" exhaust, 3" dp, irate e fuel, short throw shifter, Valair kevlar/ceramic clutch, Destination MTs, d60 RSK V codes , shackle flip B codes, bilstien shocks, scorpion bed liner, custom tailgate. 96 f350 4x4 psd, dually flatbed welding truck, zf 5 speed, stock. 79 bronco.
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Old 07-29-2014, 07:58 PM
cnhtech cnhtech is offline
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I crawled under it last night and noticed it had a muffler towards the rear and what I guess would be a catylitic converter closer to the front. Is this "converter" a known problem? Like I said in the original post, with out the trailer it seems fine. If it was a gasser, it acts to me like an exhaugst restriction like a converter being plugged up.
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  #5  
Old 07-29-2014, 09:28 PM
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A lot of us get rid of the cat and muffer, even take all the exhaust off and go with 3" DP, 4" straight pipe exhaust. Then put on a 6637 or AFE air filter and let that baby breath. That's the first thing to do and after that we can spend all your money, LOL!!
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Glenn The Mule-96 2WD F250 EC/LB auto PSD
The Mare 97 dually cc,modified s366 turbo,stage II's,IC,studs,springs,rods,JW auto,4:10 LS,air bags,SD uvch,efuel,FS2500 bypass oil filter,HVHF IDM,IH WP,6.0 trans cooler & rad fan,MBRP 4",SD tensioner,AFE air filter,220 amp alt,38 gal rear tank & 33 gal aux bed tank,aux oil cooler,soundproofed,3 different TS chips,ac cold mod,XS batteries,riffraff hpop reservoir,aluminum radiator,HoneyBadgerJr hpop, water injection
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Old 07-29-2014, 09:40 PM
cnhtech cnhtech is offline
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Another question, why is the exhaust pipe, down pipe I think it's called, flat? Seems to me that would restrict exhaugst flow? What's is this 6637 your referring too?
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Old 07-29-2014, 10:08 PM
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Ford shoe horned the PSD into our year of trucks, thus the flat pipe. You are 100% correct, its very restrictive. Get rid of it with a sawzal, not a torch. A 6637 is a open air filter, look on Riffraff Diesel Performance link at the top of the page under sponsors.
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Glenn The Mule-96 2WD F250 EC/LB auto PSD
The Mare 97 dually cc,modified s366 turbo,stage II's,IC,studs,springs,rods,JW auto,4:10 LS,air bags,SD uvch,efuel,FS2500 bypass oil filter,HVHF IDM,IH WP,6.0 trans cooler & rad fan,MBRP 4",SD tensioner,AFE air filter,220 amp alt,38 gal rear tank & 33 gal aux bed tank,aux oil cooler,soundproofed,3 different TS chips,ac cold mod,XS batteries,riffraff hpop reservoir,aluminum radiator,HoneyBadgerJr hpop, water injection
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  #8  
Old 07-30-2014, 11:07 AM
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I agree with Glenn. You'd be surprised how much those 2 mods help. I would also gut the exhaust back pressure valve while changing the downpipe if it were me.
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-1996 F-250 7.3L, Auto, 4x4, 3.55 gears, TC lock-up, Amsoil EaAU4095, EBPV gutted, 3" DP, Straight Pipe, 203° T-stat, 1.0 A/R Turbine Housing, 280,000 Miles
-1997 F-250HD 7.3L XCLB 114,000 miles, 3" DP to 4", EBPV gutted, EaAU4095
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  #9  
Old 07-30-2014, 07:30 PM
cnhtech cnhtech is offline
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Where's this exhaust back pressure valve at ?
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  #10  
Old 07-30-2014, 08:03 PM
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Quote:
Originally Posted by cnhtech View Post
Where's this exhaust back pressure valve at ?
between the turbo and the downpipe
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1997 F-350 xlt cclb PSD 4x4 zf5
1989 F-350 4x4 7.3 c6 auto retired
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  #11  
Old 08-31-2014, 12:32 AM
jrods2 jrods2 is offline
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wait a minuet, gut the back pressure valve? I thought the bpv was to stop the tubo from lag.
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  #12  
Old 08-31-2014, 12:46 AM
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Quote:
Originally Posted by jrods2 View Post
wait a minuet, gut the back pressure valve? I thought the bpv was to stop the tubo from lag.
ebpv is to cause back pressure to make the motor work harder when it is cold. This helps it to warm up faster.
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It's hard to soar like an eagle when your flying with a bunch of turkey's
1997 F-350 xlt cclb PSD 4x4 zf5
1989 F-350 4x4 7.3 c6 auto retired
2000 F-150 XLT 4x4 4.6 e4od
Nick
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  #13  
Old 08-31-2014, 12:46 AM
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Nope. It's just a warm up valve that's effectiveness has been questioned.
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  #14  
Old 09-02-2014, 12:16 PM
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To add to the above posts, it increases turbo lag. Gutting it will reduce turbo lag.
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-Phil -- Kickin' it OBS
-1996 F-250 7.3L, Auto, 4x4, 3.55 gears, TC lock-up, Amsoil EaAU4095, EBPV gutted, 3" DP, Straight Pipe, 203° T-stat, 1.0 A/R Turbine Housing, 280,000 Miles
-1997 F-250HD 7.3L XCLB 114,000 miles, 3" DP to 4", EBPV gutted, EaAU4095
"He that hath the Son hath life; and he that hath not the Son of God hath not life." 1 John 5:12
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  #15  
Old 09-02-2014, 02:57 PM
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Intake, exhaust,and gauges are always your first mods on these OBS's. after there are a few mods that really wake them up. IMO chip, fuel, and injectors. A lot of guys are happy with just adding a chip if you dont want to really start getting into it.
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97 F250 HD---3.5" D60 RSK Swap (1 ton suspension) with matching rear both at 4.10's, Beans D66, 6637, 3"x4" Tymer DP with 4" exaust and kitty delete, EBPV delete, DIY stage II's, Stricly Diesel electric fuel swap, Tony Wildman 6 pos chip, HPX, TE modded 17* HPOP, SD IC, Custom ranch hands front and rear, and my crawler of course
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Old 09-02-2014, 02:57 PM
 
 
 
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