Measuring header primary tube temps at cool idle with an infrared gun.

Exhaust temps are 400* to 440* on all but no 7(DS rear).

no. 7 is 510* by itself.

is this something to look into?

Thanks for the advice.

 

#7 is historically, the leanest cylinder in LSx cars with the stock intake manifold on.

Thats most likely what you are seeing.

Those temps are not out of the ordinary. If the car isnt stock, check plugs and make sure all is good!

Louis

 

bone stock LQ9

good info, before this, I was wondering if it was a restricted injector.