Engine woes or fueling issues?
Thread Starter
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Joined: Jun 2021
Posts: 497
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From: Shlumpt, TX
Just as a couple week late update. I cleaned the IAC sensor and reinstalled it.
Have not even tried to start the engine since. Tonight I may try and drive it down the street to my new house but other than that it is off
Have not even tried to start the engine since. Tonight I may try and drive it down the street to my new house but other than that it is off
Thread Starter
TECH Regular
Joined: Jun 2021
Posts: 497
Likes: 148
From: Shlumpt, TX
Okay so little bit of an update. Battery died in this truck. Seal broke wouldn't hold a charge so new battery. I was able to finally get it to learn an idle and we were back in business. Still smoked and stank though. Drove it down the street and actually it seemed like it wanted to drive. The last time I drove it was backing it into my driveway and it would just buck and surge. Parked it and started it later, same issues. Crap idle, smoky, stinky. After some time the idle goes away but the truck revs itself up on its own about 10 times before it finally settles.
Thread Starter
TECH Regular
Joined: Jun 2021
Posts: 497
Likes: 148
From: Shlumpt, TX
Pulled the fuel rails to see if anything leaks out of the injectors when key on engine off, looking for stuck open, and nothing. One injector did fall out though and was not secured so I buttoned it back down and replaced the fuel pressure regulator and still no fix.
I drove the truck around though and it seems to drive decent except very very randomly it will seem to just die and then come back to life.
I drove the truck around though and it seems to drive decent except very very randomly it will seem to just die and then come back to life.
Thread Starter
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Joined: Jun 2021
Posts: 497
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From: Shlumpt, TX
Have a new tune file someone came up with for me that apparently straightens out some things. I am hopeful but not optimistic as it would not make sense that my tune worked for 2 years and then out of the blue decided not to. Should find out here in a few hours after I get off work.
In his words "changed cylinder mass and VE for a 6.0 (lean issue). Timing tables were pretty **** fixed that. **** ton of idle spark with zero under or over adjust (hence bad jumping idle), fixed that. Drop flow to 22#s (hence it dumping fuel with 44# and stock VE tables going lean."
In his words "changed cylinder mass and VE for a 6.0 (lean issue). Timing tables were pretty **** fixed that. **** ton of idle spark with zero under or over adjust (hence bad jumping idle), fixed that. Drop flow to 22#s (hence it dumping fuel with 44# and stock VE tables going lean."
Thread Starter
TECH Regular
Joined: Jun 2021
Posts: 497
Likes: 148
From: Shlumpt, TX
Well uh a new tune fixed it. Sort of.
Truck drives and idles fine now, no power loss and AFR looks good although it idled rich for a minute or two. BUT the truck still smokes especially at idle, driving around I can't really tell. 2 month old gas now though so maybe that? I think the tune could be slightly improved, since it was an email one, but what do I know.
I wonder if all the smoke is not just residual **** in the tail pipe.
Truck drives and idles fine now, no power loss and AFR looks good although it idled rich for a minute or two. BUT the truck still smokes especially at idle, driving around I can't really tell. 2 month old gas now though so maybe that? I think the tune could be slightly improved, since it was an email one, but what do I know.
I wonder if all the smoke is not just residual **** in the tail pipe.
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Verdad Gallardo Thread Starter
TECH Regular
Joined: Jun 2021
Posts: 497
Likes: 148
From: Shlumpt, TX
One month later update.
I think the tune was a crutch for the real issue. Pretty sure I pumped water at a gas station rather than fuel. I got my tune set up and changed it up slightly and I think I was just compensating for the bad fuel.
It was pointed out to me that I was having a lot of knock in the low RPMs. I figured that was just false knock but I pulled timing throughout the low and it didn't go away. I added a can of race gas concentrate and suddenly all that low end knock basically went away. Still have a little bit but way different than before.
Today I am going to switch back to my original tune and go pump some 93 from a different station. I don't want to jinx it yet but just wanted to add to the thread.
No logs cause I'm in my own echo chamber lol
I think the tune was a crutch for the real issue. Pretty sure I pumped water at a gas station rather than fuel. I got my tune set up and changed it up slightly and I think I was just compensating for the bad fuel.
It was pointed out to me that I was having a lot of knock in the low RPMs. I figured that was just false knock but I pulled timing throughout the low and it didn't go away. I added a can of race gas concentrate and suddenly all that low end knock basically went away. Still have a little bit but way different than before.
Today I am going to switch back to my original tune and go pump some 93 from a different station. I don't want to jinx it yet but just wanted to add to the thread.
No logs cause I'm in my own echo chamber lol
Thread Starter
TECH Regular
Joined: Jun 2021
Posts: 497
Likes: 148
From: Shlumpt, TX
Been driving the truck around on that old tank of gas. Seems to be doing better although it takes a while to get it going right. Drove it 50 miles over the weekend with probably 20 minutes of idle time, just trying to get the tank all the way empty before I fill it up. Been too cold and dark to want to drive it around after work though