hello all, looking for some help here. I’m stumped. I drive a 2001 Camaro SS and am pretty good with these motors. Did and H/C/I myself came out great anyway, A buddy of mine drives a 2005 CTS V ls6 I’m posting on here for him. Some info about the car is It’s manual, stock exhaust no mods except for k&n intake and filter, stock tune and all. So we’ve tried everything we can think of. The car runs great in the cold weather at all engine temps. As soon as it’s hot outside like 85+ degrees the car runs like crap, breaks up, lags... all that. The CEL goes on and off for the MAF sensor depending on the weather. When it’s cold outside air it runs strong like it should with no CEL. When it’s hot out it runs crappy with barely any power and lags and breaks up, CEL comes on and we check it. It comes up for MAF sensor. We replaced the MAF sensor MULTIPLE times with the oem one and still the same issue. We put on a fresh new k&n intake and still the same thing. Also tried a dry filter and new maf and still the same thing. We’re trying to figure out what it can be, we are stumped!! Really need some help and pointers here!!! The car is getting around 7.8 mpg when being drivin “like it should” not sure if that’s normal mpg for it, anyway. Any help or input is greatly appreciated. Thankyou in advance, Andrew.

great Thankyou for the response going to take a look and see if i can find one. Any suggestions on what I can use to find if there is one? Maybe some sort of spray like starter fluid or something?

will do with the starter spray and no as mentioned above in the post. We tried a dry air filter with a fresh maf and still same result

Thankyou all for your input. I will be testing this tomorrow or Tuesday and get back to you guys with answers. I will be trying starter fluid or propane whatever I can get my hands on first lol. Thanks I will let you know what we find!

Yeah. Fwiw I drive less than 2 miles each way to work and still nearly get 12...