EBPV delete
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,354
Likes: 5,946
From: Lake Hartwell, GA
Guys I need help again!!!!! I hadan issue with throttle response on the old girl 7.3 and ordered a new assembly from Clay at RiffRaff. Well I installed it per instructed(no brainer) and recalibrated as instructed. Took her for a run and still the same issue. I can push the pedal to the floor and can hardly get 40 MPH out of it!!!! But then she catches up and runs great. Any ideas?? Greatly appreciated......
I read above you have an Edge tuner CTS2 or something like that. I am not familiar with that tuner, but does it have a stock tune bypass setting by chance? If so, have you tried running the truck in the stock tune?
Strange problem...
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Tuned
Joined: Dec 2014
Posts: 250
Likes: 69
From: Lake Oconee Putnam Co. Ga
Yessir Mr.Sous,I push the pedal and nothing then it's like fuel is just shot into it,it just surges ,clanking the universal joints. Thats what I mean by "catches up". I don't think it's turbo lag because I didn't have this issue a year ago before the "non oil change" fiasco. I have an Edge Evolution CS2 Diesel tuner and it has 3 settings; Stock, Tow, Race and Extreme. After the upgrade I started it off in Stock setting and had the issue so I went to the Tow setting where it is now, still the issue that's why I thought it was the TPS and bought the pedal assembly. I have a TPS gauge on the CS2 and it shows the percentage of throttle and it shows,while I'm driving, from 0 to 100% throttle. I've only driven it once sincce I moved the wires on the MAP as per SSJ so I'm not sure if that has fixed the problemor not. I will let ya'll know. And what is RiffRaff OCR?
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,124
Likes: 4,726
From: Henderson, NV
^^^This was my first thought as well.
Log the APP PID with FORScan and take particular note of what the APP percentage is as it relates to you stepping on the pedal. This is the most accurate way to tell if the signal is lagging I think.
Yessir Mr.Sous,I push the pedal and nothing then it's like fuel is just shot into it,it just surges ,clanking the universal joints. Thats what I mean by "catches up". I don't think it's turbo lag because I didn't have this issue a year ago before the "non oil change" fiasco. I have an Edge Evolution CS2 Diesel tuner and it has 3 settings; Stock, Tow, Race and Extreme. After the upgrade I started it off in Stock setting and had the issue so I went to the Tow setting where it is now, still the issue that's why I thought it was the TPS and bought the pedal assembly. I have a TPS gauge on the CS2 and it shows the percentage of throttle and it shows,while I'm driving, from 0 to 100% throttle. I've only driven it once sincce I moved the wires on the MAP as per SSJ so I'm not sure if that has fixed the problemor not. I will let ya'll know. And what is RiffRaff OCR?
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
Try unplugging the MAP sensor wire.
If no change, try unplugging the ICP sensor.
Both of these will default to values that allow the truck to run OK when unplugged. We can easily rule out problems with these sensors.
Beyond this, we’ll need to monitor some PID’s to figure out what’s going on. There aren’t many things that wouldn’t throw a code.
If no change, try unplugging the ICP sensor.
Both of these will default to values that allow the truck to run OK when unplugged. We can easily rule out problems with these sensors.
Beyond this, we’ll need to monitor some PID’s to figure out what’s going on. There aren’t many things that wouldn’t throw a code.
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Tuned
Joined: Dec 2014
Posts: 250
Likes: 69
From: Lake Oconee Putnam Co. Ga
OK so I pulled up the APP on ForeScan and it read 12.60 without pressing the pedal and on the ocilliscope was a flat line until I pressed the pedal. It then went up to about 90 or so %. Is that what it is supposed to show? and still no DTC's on ForeScan.....
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Tuned
Joined: Dec 2014
Posts: 250
Likes: 69
From: Lake Oconee Putnam Co. Ga
Hey guys, it's been a while. I purchased a boost leak tester and tested the F350 today. Man it sounded like I didn't have a v-band clamp on the turbo to spider. I took it all apart again and put it all back together. Now all I here is air escaping through the CCV doghouse which I think is normal....I HOPE!!!!!! Anyway I understand now why it is so important to do the test. I haven't test driven it yet so I can't say what a difference it has made but I will soon......
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Lead Driver
Joined: Jul 2017
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From: WV
Awesome!
I had a plenum leak that eluded me through 2 boost leak tests. Lots of soapy water finally found it. I had thought the sound was just CCV but it tricked me.
Here’s a link to the good test I did after fixing the plenum as reference. The gauge slows a lot now once you get below 10psi (from memory…). Previously it would keep going down at a steady pace all the way to zero.
I had a plenum leak that eluded me through 2 boost leak tests. Lots of soapy water finally found it. I had thought the sound was just CCV but it tricked me.
Here’s a link to the good test I did after fixing the plenum as reference. The gauge slows a lot now once you get below 10psi (from memory…). Previously it would keep going down at a steady pace all the way to zero.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,354
Likes: 5,946
From: Lake Hartwell, GA
Great job sir! Your hard work, dedication and persistence is starting to pay off. Often times when we (anyone) does a bunch of changes all at once, they don't come together right the first time around. Your ability to sort through the "issues" and find a course of action to success is what sets you and many others apart.
We hope you have many years and many, many miles of great driving ahead of you.
We hope you have many years and many, many miles of great driving ahead of you.
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UncleShank
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Apr 25, 2011 11:48 AM