5.0L fuel and timing maps
Thread Starter
Pro Mechanic
Joined: Oct 2015
Posts: 683
Likes: 151
From: Pittsburgh, PA
5.0L fuel and timing maps
I've done a few searches and have yet to find anything. Anyone know where I can get fuel and timing maps for the 5.0L?
A little background: I was checking my data logger and stumbled across my timing advance data. I'm not sure what is normal for these engines, but I'm getting some pretty extreme timing values. From what I can tell by comparing my RPMs and throttle position, I was doing some normal suburban driving. At startup and for the first few red lights, I was getting almost -8 deg. of timing advance during idle and first gear acceleration. I've never seen negative timing advance, and I can only imagine this means the spark is coming after TDC. While cruising and under light acceleration, I was seeing more reasonable timing in the high teens, low twenties, but as soon as I would let off the throttle, timing would drop into the single digits for a second or two, then shoot up into the high 40s, low 50s.
In all this seems off to me. I've got a 5.0L running 87 octane at the time. Stock tune with no major mods that I could see effecting my timing. Could this be an issue with the knock senors? Or maybe just bad data on my logger's part?
A little background: I was checking my data logger and stumbled across my timing advance data. I'm not sure what is normal for these engines, but I'm getting some pretty extreme timing values. From what I can tell by comparing my RPMs and throttle position, I was doing some normal suburban driving. At startup and for the first few red lights, I was getting almost -8 deg. of timing advance during idle and first gear acceleration. I've never seen negative timing advance, and I can only imagine this means the spark is coming after TDC. While cruising and under light acceleration, I was seeing more reasonable timing in the high teens, low twenties, but as soon as I would let off the throttle, timing would drop into the single digits for a second or two, then shoot up into the high 40s, low 50s.
In all this seems off to me. I've got a 5.0L running 87 octane at the time. Stock tune with no major mods that I could see effecting my timing. Could this be an issue with the knock senors? Or maybe just bad data on my logger's part?
5 Year Member
Joined: Dec 2013
Posts: 803
Likes: 86
From: Acton, California
On my 13 Ecoboost, on 87 I get a timing in 20-25 on 91 i get 30-35
Motorwise I only have my AFE CAI.
Is your truck running good? no knocks, ticking, misfires? If it all seems and feels good on the buttdyno I say rerun the data logger and if it is the same okay if it changes probably a bad run?
Motorwise I only have my AFE CAI.
Is your truck running good? no knocks, ticking, misfires? If it all seems and feels good on the buttdyno I say rerun the data logger and if it is the same okay if it changes probably a bad run?
Thread Starter
Pro Mechanic
Joined: Oct 2015
Posts: 683
Likes: 151
From: Pittsburgh, PA
Everything feels alright to me. Good power, no knocking or unusual ticking that I am aware of. I'll have to look further back in my data to see if this is a trend or not. I did have a pending cylinder misfire code come up a few months ago, but some dry gas fixed that since then.