Weird engine start 6.0
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
MAP:
KOEO: 12.6
Idle: 12.7
@ 2000 RPM: 16.2
At WOT: 18
VGT:
KOEO: No value displayed
Idle: 73
@ 2200 RPM: 50
I couldn't set up EBP, yet. Still fighting the SG2!
What was baro again? atmospheric pressure?
I recogniced one more confusing thing. Just came home after work. Let the truck idle for 10 seconds like always, before shutting it off. Truck started running rough, and the exhaust sound changed, hearable from inside the truck. Looked at the SG and VGT dropped to 13-15. After a couple seconds the truck idlet normaly again, and VGT raised to 70 again. What was that??
Daniel
KOEO: 12.6
Idle: 12.7
@ 2000 RPM: 16.2
At WOT: 18
VGT:
KOEO: No value displayed
Idle: 73
@ 2200 RPM: 50
I couldn't set up EBP, yet. Still fighting the SG2!
What was baro again? atmospheric pressure?
I recogniced one more confusing thing. Just came home after work. Let the truck idle for 10 seconds like always, before shutting it off. Truck started running rough, and the exhaust sound changed, hearable from inside the truck. Looked at the SG and VGT dropped to 13-15. After a couple seconds the truck idlet normaly again, and VGT raised to 70 again. What was that??
Daniel
Lead Driver
Joined: Sep 2012
Posts: 7,838
Likes: 96
From: Manteca,Ca
Here's the vid I talked about: Fuel filter housing noise on Vimeo
, let me PM Cheezit or M- chan and see if they can join us for this one.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
with out going threw a bunch of post because basicly im feeling lazy....
your truck is fuel knocking or so it sounds to me.
so far as the sound from the filter housing goes unplug the fuel pump and cycle the key see if its still there.
if its gone then make sure you dont have any fuel airation. check the filter o-rings as well.
beyond on that it may just be a matter of swap a knowen good pump in and see what happens.
your truck is fuel knocking or so it sounds to me.
so far as the sound from the filter housing goes unplug the fuel pump and cycle the key see if its still there.
if its gone then make sure you dont have any fuel airation. check the filter o-rings as well.
beyond on that it may just be a matter of swap a knowen good pump in and see what happens.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
yup that removes any question as to other sorces of the sound. now there is a good possibility the 2 concerns are connected if my first guess is correct
Thread Starter
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Junior User
Joined: May 2013
Posts: 68
Likes: 0
From: Alamogordo, NM
Hi guys!
Elevation is 4500ft.
The sound is definitely coming from the fuel bowl, you can feel it vibrating, and it stops, when I the fuel pump turns off.
Ok, I'll unplug the fuel pump, and cycle the key. We'll see what happens.
Just checked the price for a new hfcm...
I replaced the o-rings on the filter, and the fuel cap, both primary and secondary.
How can I make sure, I don't have fuel airation? There is no transparent fuel line.
What is fuel knocking?
Elevation is 4500ft.
The sound is definitely coming from the fuel bowl, you can feel it vibrating, and it stops, when I the fuel pump turns off.
Ok, I'll unplug the fuel pump, and cycle the key. We'll see what happens.
Just checked the price for a new hfcm...
I replaced the o-rings on the filter, and the fuel cap, both primary and secondary.
How can I make sure, I don't have fuel airation? There is no transparent fuel line.
What is fuel knocking?
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Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
fuel knocking sounds just like what your truck is doing. its not got enugh fuel to start but enugh to try.
you woul neet to make some fitting for temp use to diag it. some were i have an old section of fuel line i spliced up for doing that.
you woul neet to make some fitting for temp use to diag it. some were i have an old section of fuel line i spliced up for doing that.
Thread Starter
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Junior User
Joined: May 2013
Posts: 68
Likes: 0
From: Alamogordo, NM
I also think that it doesn't get enough fuel. But why does it run ok when the truck is warmed up? But then sometimes it's starts like crap... Sometimes for the first 3-4 seconds it runs with 300-400 rpm's until it starts to idleing normal. Even the engine is fully warmed up.
Aw **** I'll order a new hfcm.
Aw **** I'll order a new hfcm.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
What washer are you talking about? I have looked this picture over and I don't see what you are talking about. It looks like the inside of the oil filter cap and it looks like a little puddle of oil on the one side of the center circle.
Lead Driver
Joined: Sep 2012
Posts: 7,838
Likes: 96
From: Manteca,Ca
Brett , the right center where the filter presses down follow the center in a circle ,you will see I'll call it a washer probably another name, the housing even looks damaged at that point too.
Thread Starter
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Junior User
Joined: May 2013
Posts: 68
Likes: 0
From: Alamogordo, NM
Hmm could really be a puddle of oil. As I said, I pulled the oil filter housing again, and couldn't see a washer at all.
Anyway I unolugged the connector from the hfcm and there was no more pulsating and vibration.
I ordered a fitting to check the fuel pressure. But it points to the hfcm/fuel pressure.
Anyway I unolugged the connector from the hfcm and there was no more pulsating and vibration.
I ordered a fitting to check the fuel pressure. But it points to the hfcm/fuel pressure.