2008 Silverado Won't start - cranks, fires, runs, then dies
#1
Thread Starter
TECH Senior Member
iTrader: (79)
Joined: Jun 2002
Posts: 5,175
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From: League City, Tx
I did a turbo kit, 80e swap and cam install on a 2008. Got everything bolted back and ready to go, and it won't stay running.
It's still on the previous DOD delete tune from a previous cam swap, along with the 60e tune
My question is, is the segment tune for the 80e a must to make it "run?" I'm just wanting it to fire up to check for leaks.
When I crank it and runs for 1-2 seconds and dies, it has 40+ psi oil pressure. I deleted both VATs, but I haven't verified that the fuel pump is being killed.
What am I missing?
It's still on the previous DOD delete tune from a previous cam swap, along with the 60e tune
My question is, is the segment tune for the 80e a must to make it "run?" I'm just wanting it to fire up to check for leaks.
When I crank it and runs for 1-2 seconds and dies, it has 40+ psi oil pressure. I deleted both VATs, but I haven't verified that the fuel pump is being killed.
What am I missing?
#2
Joined: Jan 2006
Posts: 16,282
Likes: 438
From: Huntsville, AL
How different is the cam? Both coil packs plugged in? No you shouldn't need have to do the 80e segment for it to start and idle. Try adding 15% to the base running airflow table to see if it stays running.
#5
Have you checked the MAF sensor or wire running to it. If it is speed density, sometimes the e38 will not fail the MAF and switch to speed density.
Also I ran my 4l80 with the 4l60 tune. I drove to a guy to write the 4l80 tune before I had EFI Live. It just puts it in limp mode (2nd gear only).
Also I ran my 4l80 with the 4l60 tune. I drove to a guy to write the 4l80 tune before I had EFI Live. It just puts it in limp mode (2nd gear only).
Last edited by foxnutz; Feb 1, 2016 at 08:30 PM.
#6
Thread Starter
TECH Senior Member
iTrader: (79)
Joined: Jun 2002
Posts: 5,175
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From: League City, Tx
Have you checked the MAF sensor or wire running to it. If it is speed density, sometimes the e38 will not fail the MAF and switch to speed density.
Also I ran my 4l80 with the 4l60 tune. I drove to a guy to write the 4l80 tune before I had Eli live. It just puts it in limp mode (2nd gear only).
Also I ran my 4l80 with the 4l60 tune. I drove to a guy to write the 4l80 tune before I had Eli live. It just puts it in limp mode (2nd gear only).






