9/2004 Escalade ESV. 220k miles.
Hesitates and stumbles badly, going from a standing start, usually after idling (and heat soaking) at a light for a few minutes.
It does not do it when the engine has been sitting all night. Engine must be fully up to operating temperature, and been there for awhile, and ambient temp is higher than 110.
It does not do it (much) if the ambient temperature is less than 110, even if fully warmed up. If it's 95 or less, it's fully happy and doesn't do it at all.
There are no codes stored that I can read with my basic OBDII scanner.
Since I have a Suburban (5.3) built the same month, and since it uses the same MAF, I swapped its known good MAF unit into the escalade. That made no difference.
So I know it's temperature related, and I would assume that a scan tool that displays live data would be helpful (lol) but I don't have that. Any ideas?
Hesitates and stumbles badly, going from a standing start, usually after idling (and heat soaking) at a light for a few minutes.
It does not do it when the engine has been sitting all night. Engine must be fully up to operating temperature, and been there for awhile, and ambient temp is higher than 110.
It does not do it (much) if the ambient temperature is less than 110, even if fully warmed up. If it's 95 or less, it's fully happy and doesn't do it at all.
There are no codes stored that I can read with my basic OBDII scanner.
Since I have a Suburban (5.3) built the same month, and since it uses the same MAF, I swapped its known good MAF unit into the escalade. That made no difference.
So I know it's temperature related, and I would assume that a scan tool that displays live data would be helpful (lol) but I don't have that. Any ideas?