Another Fuel Pressure question - Ford Powerstroke Diesel Forum
6.7 Motor Problems (2011-2016) 6.7 Motor Problems

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post #1 of 35 Old 08-13-2019, 07:32 AM Thread Starter
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Another Fuel Pressure question

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

Last edited by danmanswag; 08-13-2019 at 10:01 AM.
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post #2 of 35 Old 08-13-2019, 07:38 AM
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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

'11 F-250 RCLB FX4 6.7 - Deleted, SCT GTX - Tyrant tuned, Duratrac's on Moto Metal 962's - Sold
'17 Grand Cherokee SRT - Stock
'97 SVT Cobra - Few things
'88 Mustang LX - Built 306ci, built AOD, 4.10's - Sold
'06 F-350 ECSB Lariat FX4 6.0 - Studded, deleted etc..-Sold
'07 F-250 XLT ECSB 4x4 6.0 - Studded, deleted etc..-Totaled
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post #3 of 35 Old 08-13-2019, 07:46 AM
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And who the hell is GAW Diesel

Lol, right?

If youíve been driving it this long starving the HPFP or itís starting to fail, you are just costing yourself more money. A lot more money. So much money.
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post #4 of 35 Old 08-13-2019, 07:48 AM Thread Starter
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Originally Posted by jman37 View Post
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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post #5 of 35 Old 08-13-2019, 07:49 AM Thread Starter
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Lol, right?

If youíve been driving it this long starving the HPFP or itís 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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post #6 of 35 Old 08-13-2019, 07:56 AM
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Iím hoping itís just a fuel filter issue for you. Iíd think that were it a pump issue it wouldíve failed by now.

Itís really best not to keep driving with a low fuel pressure warning. Thatís a $5k-$10$ repair.
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post #7 of 35 Old 08-13-2019, 07:58 AM Thread Starter
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Originally Posted by Old King Coal View Post
Iím hoping itís just a fuel filter issue for you. Iíd think that were it a pump issue it wouldíve failed by now.

Itís really best not to keep driving with a low fuel pressure warning. Thatís 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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post #8 of 35 Old 08-13-2019, 08:08 AM
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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.

'11 F-250 RCLB FX4 6.7 - Deleted, SCT GTX - Tyrant tuned, Duratrac's on Moto Metal 962's - Sold
'17 Grand Cherokee SRT - Stock
'97 SVT Cobra - Few things
'88 Mustang LX - Built 306ci, built AOD, 4.10's - Sold
'06 F-350 ECSB Lariat FX4 6.0 - Studded, deleted etc..-Sold
'07 F-250 XLT ECSB 4x4 6.0 - Studded, deleted etc..-Totaled
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post #9 of 35 Old 08-13-2019, 08:16 AM Thread Starter
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Originally Posted by jman37 View Post
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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post #10 of 35 Old 08-13-2019, 08:23 AM
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...what did you use to tune the truck with? You can check the data yourself.

'11 F-250 RCLB FX4 6.7 - Deleted, SCT GTX - Tyrant tuned, Duratrac's on Moto Metal 962's - Sold
'17 Grand Cherokee SRT - Stock
'97 SVT Cobra - Few things
'88 Mustang LX - Built 306ci, built AOD, 4.10's - Sold
'06 F-350 ECSB Lariat FX4 6.0 - Studded, deleted etc..-Sold
'07 F-250 XLT ECSB 4x4 6.0 - Studded, deleted etc..-Totaled
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