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Discussion Starter #1 (Edited)
2016 6.7 F250

Got a delete and 5 stage tune at GAW diesel...they came highly recommended (not sure about that)

Everything was good, no issues...took my truck in for oil change and fuel filter changes a few thousand miles later. 1 day after the service I get the fuel pressure light and start reading up on it. I called them up and explained and they tell me "bring it in, we'll check it out, might need a new fuel pump"

That really bothered me because they went right into saying I might need a new fuel pump instead of just saying they'll check it, maybe something is loose, etc. I decided not to do anything for a few thousand miles until I needed a couple new tires. Took it to my old mechanic (extremely trustworthy). He changed oil and both filters, checked everything out and said he didnt see any issues. Sure enough the light comes back on.

I've now driven almost 10k miles with this stupid light. My truck still has plenty of power..in the words of my mechanic "it's a rocket ship".

What is everybodys opinion? Should I be worried? Should I take it to the original place that did my delete and tune and possibly get bent over and raped? Being in Miami it's hard to trust ppl...GAW shop seems like good people, but it didn't sit well when they didn't offer to double check their work and went right in to an expensive repair.

TIA
 

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I would get it checked out pronto, shouldn't be driving it because for all you know you're starving the injectors for fuel. What is your actual fuel pressure? Could be as simple as the FRP sensor...

And who the hell is GAW Diesel
 

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And who the hell is GAW Diesel

Lol, right?

If you’ve been driving it this long starving the HPFP or it’s starting to fail, you are just costing yourself more money. A lot more money. So much money.
 
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I would get it checked out pronto, shouldn't be driving it because for all you know you're starving the injectors for fuel. What is your actual fuel pressure? Could be as simple as the FRP sensor...

And who the hell is GAW Diesel
I left my truck at my original mechanic and will pick it up today...i'll check the actual fuel pressure.

I listed them just in case there were ppl in MIami and they could give me some insight. They're a reputable diesel shop called "Gabby Auto Works (GAW) "
 

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Lol, right?

If you’ve been driving it this long starving the HPFP or it’s starting to fail, you are just costing yourself more money. A lot more money. So much money.
LOL...welp

The truck is driving the same as it did before...nothing has changed in the past 8-10k miles
 

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I’m hoping it’s just a fuel filter issue for you. I’d think that were it a pump issue it would’ve failed by now.

It’s really best not to keep driving with a low fuel pressure warning. That’s a $5k-$10$ repair.
 
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I’m hoping it’s just a fuel filter issue for you. I’d think that were it a pump issue it would’ve failed by now.

It’s really best not to keep driving with a low fuel pressure warning. That’s a $5k-$10$ repair.
That's what my mechanic says...unfortunately he's not a diesel specialist so there's not much more he can do for me.
 

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What did you tune the truck with? EZ Lynk? GtX? If it's an X4 I don't think you'll be able to see FRP sensor data so you'd need an OBD dongle and an app. The other 2 you can see it. But this "trusted" shop I'd certainly question, they should be able to check that with ease for you. I'd certainly think twice of running their tune from here on out.
 

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What did you tune the truck with? EZ Lynk? GtX? If it's an X4 I don't think you'll be able to see FRP sensor data so you'd need an OBD dongle and an app. The other 2 you can see it. But this "trusted" shop I'd certainly question, they should be able to check that with ease for you. I'd certainly think twice of running their tune from here on out.
That's what I was thinking....is it worth just going to another shop and going with a new tune? My mechanic couldn't get the sensor data because of the tune.

At this point it's either trust the original shop that did my delete and tune, or find another one in the area.
 

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...what did you use to tune the truck with? You can check the data yourself.
 

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You didn’t get a tuner? Did you drop the truck off at the shop and then pick it back up tuned and deleted and they didn’t hand you a tuner?
 

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I'd be pretty mad for paying probably $1500+ and I didn't even get something to keep.
 

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Yeah lets not get into bad decisions lol...just want to resolve and then we can get into that stuff.

I dropped off truck for delete and tune. Tune is "allegedly" a 5 stage that has a knob under my steering wheel area. Knob has 1-5 turns for the different stages (allegedly).

Instagram gaw_diesel This is the place for reference...maybe you see something in the pictures that gives away info.
 

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You might want to take the “highly recommended” out of that first post. The fact that they deleted and tuned your truck without giving you a tuner sucks.

You should’ve been given a tuner. That way you could buy tunes from anywhere if you didn’t like what they gave you. They’ll probably say it would cost more money, which it would, but it’s worth it. I just hope they sold you a good tune and not something they concocted. They might be the best tuners in the world. But I doubt it.
 

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I stopped scrolling when I saw trucks with 24's and stretched tires.
 

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I've now driven almost 10k miles with this stupid light.

Well that has already happened, not much else you can do.



With the concerns over the type of device used to tune the truck, you need that answer first and foremost. If GAW isn't going to give you a physical device your options are going to be limited in the future. Nice way to keep you captive as a customer.



To the Low Pressure "light" seems odd it popped up long after the initial work...yet it happened after fuel filter changes. Hmmmm.....You should be able to cycle the key to ON, if there's no noise from the fuel system that resolves the "air in the system" concern....I'd say it's a sensor issue. If you hear pump noise, you need to go thru the key ON position purge to run the lower pump till you don't hear any noise. Most will say 6x but I have gone as much as 10-12x before the noise has decreased to an acceptable level. IF by some chance the noise is still present after 10-12x key cycles you need to check the filter connections on the upper filter, then check the lower housing is sealed properly. People report the lower housing o-ring will roll over, or not seal properly. At the end of all this air is a M-Fer to the 6.7L fuel system. Adding another wrench is the truck runs fine by your accounts.





At this point we can sling poo into the fan till the end of the day....you need to get a no BS shop to hook up and see what's what with the system info. Especially to find fuel pressure readings or any soft codes on the PCM.
 

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You might want to take the “highly recommended” out of that first post. The fact that they deleted and tuned your truck without giving you a tuner sucks.

You should’ve been given a tuner. That way you could buy tunes from anywhere if you didn’t like what they gave you. They’ll probably say it would cost more money, which it would, but it’s worth it. I just hope they sold you a good tune and not something they concocted. They might be the best tuners in the world. But I doubt it.
I tried to edit, but maybe since I'm still new I don't have the ability.
 

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Discussion Starter #19 (Edited)
Well that has already happened, not much else you can do.



With the concerns over the type of device used to tune the truck, you need that answer first and foremost. If GAW isn't going to give you a physical device your options are going to be limited in the future. Nice way to keep you captive as a customer.



To the Low Pressure "light" seems odd it popped up long after the initial work...yet it happened after fuel filter changes. Hmmmm.....You should be able to cycle the key to ON, if there's no noise from the fuel system that resolves the "air in the system" concern....I'd say it's a sensor issue. If you hear pump noise, you need to go thru the key ON position purge to run the lower pump till you don't hear any noise. Most will say 6x but I have gone as much as 10-12x before the noise has decreased to an acceptable level. IF by some chance the noise is still present after 10-12x key cycles you need to check the filter connections on the upper filter, then check the lower housing is sealed properly. People report the lower housing o-ring will roll over, or not seal properly. At the end of all this air is a M-Fer to the 6.7L fuel system. Adding another wrench is the truck runs fine by your accounts.





At this point we can sling poo into the fan till the end of the day....you need to get a no BS shop to hook up and see what's what with the system info. Especially to find fuel pressure readings or any soft codes on the PCM.
Appreciate the info. I'll check a few things out when I get my truck back later after work.

They did offer a device but insisted it was unnecessary and expensive. In hindsight, I should've just gotten it...but as you can see, I'm no expert....I thought I was taking advice from the "experts".

I tried to listen to the "pump noise" when I read some threads months ago or anything else and didn't notice anything...at the same time, I'm not sure what I was listening for exactly.

I'll start from square 1 again and report back here later....appreciate the help.

/ as you can see, I'm not much of a diesel mechanic....give me an outboard and I'll pull the lower unit, change oils, filters, pumps and tstats.
 

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So what did they give as an "expensive" device price? What work was done? What did they charge you for all the work??


I'm not trying to bust your chops, if you want an outside opinion to consider before you want to recommend this shop to anyone else.
 
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