95 7.3 won't rev passed 1200RPM - Ford Powerstroke Diesel Forum
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post #1 of 27 Old 11-07-2012, 07:39 AM Thread Starter
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95 7.3 won't rev passed 1200RPM

Ok so I have a 95 cc dually 7.3 diesel that starts up and idles fine sounds good. When I put into drive or even in neutral or park it won't rev passed 1200RPM? I just replaced the IPR, CPS 3 times and oil, oil filter, no leaks anywhere IDM also replaced with 2 known good ones? Does anyone know what this could be? Is it something db I overlooking? Thanks for the help


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post #2 of 27 Old 11-08-2012, 03:20 PM
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I am rarely speechless around here but this has got me. Can you take and post a video?

Matt
-'97 Mini Monster
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-'15 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal
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post #3 of 27 Old 11-08-2012, 03:54 PM
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Could be the hpop is totally dead, could be throttle pedal position sensor, could be the low pressure pump or the pickup not supplying oil to the hpop . How's the fuel filter? Could also be the fuel pump.

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post #4 of 27 Old 11-08-2012, 04:20 PM
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I'm having same problem just got back together today after new heads finally got it started after hour n half cranking won't rev past 1500. Also water coming out back motor between tyranny a.d motor looks like. I'm completely puzzled.
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post #5 of 27 Old 11-09-2012, 07:28 AM Thread Starter
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Here is a video of my issue, fuel pressure is 50psi at filter hpop seems to be in good order the truck sounds fine at idle just won't do anything tranny fluid is good a new oil is new and good. Check out the video and let me know what you think thanks..

http://i128.photobucket.com/albums/p...98168348E4.mp4


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post #6 of 27 Old 11-09-2012, 07:47 AM
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That is SO weird. There is no hesitation, popping, stuttering at all. Just black smoke. The smoke only tells me that it is drastically over fueling with not enough air to support combustion. Have you taken apart the entire intake system to look for a restriction (wife had a rat eat through the air filter where you couldn't see it and made a home inside the intake tube blocking the thing up).

Matt
-'97 Mini Monster
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-'15 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal

Last edited by BigFuel; 11-09-2012 at 08:21 AM.
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post #7 of 27 Old 11-09-2012, 07:50 AM
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Wait, that hiss. Is your EBPV stuck closed? Reach under the turbine output and disconnect the EBPV actuator rod. Pull and wire the Butterfly valve arm toward the turbine. Try again.

Matt
-'97 Mini Monster
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-'15 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal
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post #8 of 27 Old 11-09-2012, 08:26 AM
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I'm also noticing by watching to the end that it's time to replace your Vacuum pump and check the lines for cracking.

Matt
-'97 Mini Monster
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-'15 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal
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post #9 of 27 Old 11-09-2012, 03:13 PM Thread Starter
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Thanks big fuel, I was feeling under the weather today so I am hoping to take a look tomorrow, I will disconnect the rod under the output of the turbo and see what happens.. Also where is the vacuum pump located and what hoses should I be looking at? Thanks for all the good advice I hope we can figure this out!!!


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post #10 of 27 Old 11-09-2012, 03:24 PM
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Right under the A/C compressor. It has a rubber line that goes back to the firewall and feeds your Brake booster and various other things inside the cab. Pull the line off the booster and hook a vacuum gauge to it while the truck is running. What's it read? When you jumped into your truck the brake light was on but after you rev'ed the motor it went out. May also be why your ABS light is on.

Matt
-'97 Mini Monster
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-'15 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal

Last edited by BigFuel; 11-09-2012 at 05:52 PM.
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