Definitely need help

[stangcrazy84]

Where to begin !! Months ago my 08 Hoe upon start the starter stuck engaged pop hood yang positive lead kill power scratch head ... its a new starter
Replace mega fuse because it popped while replacing i found/discovered plenty of oddly broken chewed ? Wires in the harness that plugs in under fuse box fix all those issues color to color of course
Then find more wires in the same state i believe its the cam or crank sensor directly above crank pulley
Fix all those wires color to color ... problem solved for about 3 days
Son drove it complained of a fuel smell raw gas I brushed it off
I personally drove it 2 days later and upon start it was severely missfiring horribly
And there is 100% a fuel leak at or near tank pop hood and start looking for? God only knows I'm not good at diagnosis
So while running I pull coil wires on DS 1 no change 3/5 big change it gets worse 7 no change it has the Range tuner on it also
Had codes pulled so at least I have a starting point
Codes as listed
P069e
3401
3425
3441
3449
P1092
Would could the fuel leak issue be the culprit or where do yall thing all the codes are pointing to the smoking gun
Thanks
Tobias

 

[Joseph Garcia]

Here is a summary of the codes that you are receiving:

P069e
The GM trouble code P069E indicates a problem with the Fuel Pump Control Module (FPCM). Specifically, it means the FPCM has requested the Malfunction Indicator Light (MIL), also known as the check engine light, to illuminate due to a detected fault within the fuel pump system. This code is commonly encountered in GM vehicles like Chevrolet Silverados and GMC Sierras.

3401
The trouble code P3401 in a GM vehicle stands for "Cylinder 1 Deactivation/Intake Valve Control Circuit Open". This means that the powertrain control module (PCM) has detected a problem with the intake valve control circuit for cylinder number 1, indicating that it is not activating or deactivating as commanded.

3425
The OBD-II trouble code P3425 indicates a Cylinder 4 Deactivation/Intake Valve Control Circuit/Open issue. This means the vehicle's Powertrain Control Module (PCM) has detected a problem with the solenoid circuit that controls the intake valve for cylinder number 4 during cylinder deactivation.

3441
The GM trouble code P3441 indicates a problem with the Cylinder 6 Deactivation/Intake Valve Control Circuit or Intake Valve Control Circuit/Open. This code is typically triggered when the Powertrain Control Module (PCM) detects an issue with the cylinder deactivation system, specifically related to the intake valve control for cylinder #6. The deactivation system, also known as Multiple Displacement System (MDS), allows the engine to run on fewer cylinders to save fuel during light load conditions.

3449
The GM trouble code P3449 means Cylinder 7 Deactivation/Intake Valve Control Circuit/Open.
This code is triggered when the Powertrain Control Module (PCM) detects an issue with the cylinder deactivation system on cylinder number 7. This system is designed to improve fuel economy by temporarily disabling certain cylinders when full engine power isn't needed, such as when cruising at a steady speed or idling.

P1092
The GM trouble code P1092 typically indicates a fuel trim issue, specifically related to the pre-catalyst oxygen sensor on Bank 2. This means the engine's computer is detecting a lean or rich condition on that side of the engine, likely due to a problem with the fuel/air mixture.

The first and last codes that you have appear to be fuel pump itself or the fuel control module. Depending on the size of the fuel tank leak, it could be responsible for these 2 codes. Other members of this Forum much more knowledgeable than me in this area will chime in.

 

[j91z28d1]

sounds like be rats or mice eating your wiring. it's pretty common it seems up north from watching sma videos.

 

[stangcrazy84]

Ok gents I'm just hoping its a bad/ broken wire issue or not enough fuel delivery but I need this thing back on the road
Thanks again

 

[OBSandaNNBS]

Ok gents I'm just hoping its a bad/ broken wire issue or not enough fuel delivery but I need this thing back on the road
Thanks again

How old is the fuel pump? Miles on it and truck?

 

[stangcrazy84]

How old is the fuel pump? Miles on it and truck?

08 lt 4wd I have personally never changed it 306k I have owned it since 125k

 

[swathdiver]

Sounds like a rodent is making his way around your wiring harness. Kill him and if you can't fix the harness, replace it.

 

[Marky Dissod]

How old is the fuel pump? Miles on it and truck?

08 lt 4wd I have personally never changed it 306k I have owned it since 125k

If the fuel pump is 306,000 miles old, and you are set on keeping it til it fails,
at least buy a spare one to keep around for when it does.
Fuel pumps won't get any cheaper, and 306,000 is likely a longevity record.

 

[OBSandaNNBS]

08 lt 4wd I have personally never changed it 306k I have owned it since 125k

Wow, 306, bravo! I suspect you have a both a fuel pump and wiring issue. One bad wire can wreak absolute havoc on these trucks...
Start with what swath said, kill the rodent, repair, preferably replace, harness, and then see if the problem goes away. If not, see what codes are left and think about the pump.

At the same time 306K is a good run. If you haven't done any major work, there could be other time bombs just waiting for you to fix this problem...

Don't neglect killing the rodent.

 

[stangcrazy84]

So what we have learned rodent must eat a bullet no problem there
306 on a fuel.pump is absolutely impressive
And it has had Lifters replaced at 255 and issue free from then till now
I'll see if I can get pics of the rodent damage and possibly yall can help out on the diagram of the harness ect thank you fellas

 

[stangcrazy84]

Pics as promised

 

[mikez71]

That first picture, on my truck those wires are between the two power steering lines.
It looks like yours could be rubbing on the steering boot.

Good luck with the rodent issue!

 

[solli5pack]

That first picture, on my truck those wires are between the two power steering lines.
It looks like yours could be rubbing on the steering boot.

Good luck with the rodent issue!

I've always found it odd how that harness is run down between the p/s pipes. I have put fresh wire loom on that a few times worrying about wires rubbing.

 

[mikez71]

Agree, I never liked the way it was between the two pipes, looks wedged in there.
But I guess the alternative is rubbing the steering boot!
Surely there's some nicer way to route it..

 

[stangcrazy84]

Yet more new carnage found

 

[solli5pack]

Yet more new carnage found

Damm! Get a cat!

 

[OBSandaNNBS]

Damm! Get a cat!

I think OP is trying to reduce his problems, not increase them by throwing a (likely) homicidal feline into the mix

@stangcrazy84 Yikes! You've got your work cut out...I see there are used harnesses on eBay for about $250. Depends on how much more damage you find

 

[stangcrazy84]

Damm! Get a cat!

Bro as of tonight I started feeding all the local strays out here lol we have but the city cats lol 10/22 ruger is ready to bark

 

[stangcrazy84]

I think OP is trying to reduce his problems, not increase them by throwing a (likely) homicidal feline into the mix

@stangcrazy84 Yikes! You've got your work cut out...I see there are used harnesses on eBay for about $250. Depends on how much more damage you find

I have a fairly extensive wiring tool collection but MF some of these spots arent super handy to work in

 

[OBSandaNNBS]

I have a fairly extensive wiring tool collection but MF some of these spots arent super handy to work in

Sounds like you have the skills and kit. And remember, GM makes it like that just to screw with us.