needed experanced 7.3 help please!!!!!!
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needed experanced 7.3 help please!!!!!!
Okay, have been to the other sites, and really no help. Have a 2000, f-350 w/7.3, about two weeks ago will start fine, warm up fine, but after driving awhile I will loose boost to turbo. Thought EBPV sensor, changed it and cleaned tube. Nothing changed, did the EBPV delete, still nothing changed. Checked wastegate actuator, works fine at 8 pounds, great at 20. Now here is the kicker, when if does this, I put foot on petals, the more pressure, the slower I go, as I ease up off petals, I will gain speed, put you can hear turbo spoiling just sounds Luke something is blocking air flow. When it foes this, if I turn the truck off, ( while driving mind you) and restart it, it goes back to normal for a few miles, then starts crap all over. So then you think electrical. The only the ele. controling preside up there is the MAP sensor. So I replaced that too. It helped, worked, great now, until I turned off the truck before taking son to work.
Bottom line, need some help here, its my only vehicle, and don't want to rely on ppl. Thank you
Bottom line, need some help here, its my only vehicle, and don't want to rely on ppl. Thank you
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
What do you mean by loosing boost to the turbo? How are you monitoring this? When you say pushing on the petals, are you referring to the accelerator pedal? Do you have a chip or tuner? Do you have a cat that might be plugged? Has your fuel economy changed?
Post Fiend
Joined: Jun 2004
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From: Parker, CO
You aren't loosing boost, you are loosing fuel.
Stop looking for a boost issue and start focusing on how you could possibly be under fueling. Your problem is most likely electrical, but it's going to have to do with either fuel delivery, or oil delivery to the injectors. Quite a few things to check there.
Stop looking for a boost issue and start focusing on how you could possibly be under fueling. Your problem is most likely electrical, but it's going to have to do with either fuel delivery, or oil delivery to the injectors. Quite a few things to check there.
Post Fiend
Joined: Sep 2003
Posts: 6,096
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From: Mesa AZ
I would suspect low fuel flow or EBPV is closing. What are the ambient temps there?
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
Then you may be losing drive pressure like Curtis suggested. Are you able to check codes and view live data? I am wondering what ICP and IPR duty cycle look like when the symptoms occur. Is your SES light on?
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Light on, nut here's with that. When driving light on, when let of petal, light goes out.no no way to check codes
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Fuel restriction is indicated. When you push the go fast pedal, the pump cannot keep up. This indicates a fuel flow restriction at high demand. When you "turn the engine off" and back on, (or release the go fast pedal) you are allowing the pump to catch up to demand. You probably don't have a lot of power when you tow, either.
Search for and do the Hutch mod. While you are in the tank, cut the filler and vent neck shorter inside the tank to take care of slow filling the last 5 gallons at the pump.
Directions / parts list for DIY from Guzzle:Welcome to guzzle's In-tank Hutch Mod Web Page
Pre-made kit here: Driven Diesel Fuel Tank / Pre-Pump Kit
I have done the hutch mod on 2 trucks, made a big difference on both.
Search for and do the Hutch mod. While you are in the tank, cut the filler and vent neck shorter inside the tank to take care of slow filling the last 5 gallons at the pump.
Directions / parts list for DIY from Guzzle:Welcome to guzzle's In-tank Hutch Mod Web Page
Pre-made kit here: Driven Diesel Fuel Tank / Pre-Pump Kit
I have done the hutch mod on 2 trucks, made a big difference on both.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
You'll need to find a way to get those codes. The truck is trying to tell you what's wrong. No sense in chasing down a problem blindly when a code is readily available to be scanned.
Post Fiend
Joined: Sep 2003
Posts: 6,096
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From: Mesa AZ
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Omaha Nebraska, not tying to sound like a jerk, had truck for year and a half, last time it was scanned, threw out so many codes mech, ( Ford )) said truck should not even run. Kept coming back with cylinders our of balance, what has been done:
New harness and gaskets
New ipr
New icp
Multible sensors
Hpop resealed when new ipr
EBPV delete
New cam ****. Sensor
New harness and gaskets
New ipr
New icp
Multible sensors
Hpop resealed when new ipr
EBPV delete
New cam ****. Sensor