spark retard issue silvrado 2011

hello there

I have an issue with this car it's retard the advance up to -20

I can't see the problem ?!!




see the log in attachment

any thoght guys ??

Post your tune. Why is it at 228 degrees?

it's stock file i did't tune it

Attachment 90945

any Pro tuner can tell us where the problem is ?


In the attachment log file

I saw the MAF reading goes highter.

stell looking...

Are you able to post the tune file?

Sure

see the attachment

You need to log all the channels that relate to spark timing.

Anything that can pull timing is what you need to be logging. So any of the spark correction tables like the IAT, ECT, torque mngt.

I can already tell you strictly based on the last log you are losing 13 degrees of timing from the IAT temps. The temps are around 125-135 degrees and that IAT spark table is pulling 10-13 degrees.

I've never seen a command idle speed of 361rpm before either. I'd try asking for 600rpm all the time when it's warmed up too.

thanks for lighting I'm working on it