My 2011 5.3 is way rich!
#1
Corvette & Mustang Moderator
Thread Starter
iTrader: (4)
Join Date: Nov 2001
Location: Sugar Land, TX
Posts: 2,371
Likes: 0
Received 0 Likes
on
0 Posts
My 2011 5.3 is way rich!
New 2011 5.3 Silverado, 510 miles. Commanded AFR of 10.8 and as little as about 21* of timing in some frames! I don't have a wide band on it but if commaned is actual then GM has tuned this engine awfully rich. My truck could use a tune!
#3
Corvette & Mustang Moderator
Thread Starter
iTrader: (4)
Join Date: Nov 2001
Location: Sugar Land, TX
Posts: 2,371
Likes: 0
Received 0 Likes
on
0 Posts
Yep, I'm sure the 6.2s are about detuned about the same. For GM to give these trucks a 100K mile warranty I suppose they have to be very conservative.
Gut my third cat that seems to me almost redundant, give it a good 93 octane tune and I might pick up a few horses.
Gut my third cat that seems to me almost redundant, give it a good 93 octane tune and I might pick up a few horses.
#7
Corvette & Mustang Moderator
Thread Starter
iTrader: (4)
Join Date: Nov 2001
Location: Sugar Land, TX
Posts: 2,371
Likes: 0
Received 0 Likes
on
0 Posts
The pump that I bought gas says up to 10% Ethanol I believe. However my Corvette always shows a commanded 14.68. I did buy 89 octane and always 93 with my Corvette. Maybe a difference???
Trending Topics
#9
Teching In
Join Date: Aug 2010
Location: Lake Stevens WA
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
Pretty sure that 7% should be more like 14.27 and is your corvette e-85? If not it will command the 0% ethanol content and your fueling will have that E?% error from the start.
#10
Corvette & Mustang Moderator
Thread Starter
iTrader: (4)
Join Date: Nov 2001
Location: Sugar Land, TX
Posts: 2,371
Likes: 0
Received 0 Likes
on
0 Posts
I'm going to try 93 in the truck and see if anything changes.
Thread
Thread Starter
Forum
Replies
Last Post
Cowboy Tom
Tuning, Diagnostics, Electronics, and Wiring
24
02-11-2017 08:20 PM
wrb002
Trucks and SUV Classifieds
0
08-25-2015 03:56 PM
silverstreak07
8-Lug Truck Performance
3
08-23-2015 07:09 PM