Originally Posted by ccmac
Will a chip alter or disable the stock high idle and EBPV system?
I'm planning on buying a custom ts 6 position chip (PHP Phoenix most likely) and I havent been able to find a conclusive answer through searches. I really dont have a use for a high idle setting on the chip as long as the factory high idle will still be working...
There's a reason to have a dedicated Hi-Idle tune. Factory High idle does not help warm up the truck faster at all. It will, but it takes much longer because it's on a timer and when you hit the brake it goes away. The idea of a HI-Idle tune is for getting the truck warmed up faster in winter, having a colder air conditioning out-put in summer and to use equipment from the trucks. We have many customers with welders and compressors and the HI-Idle helps power their equipment. Having an Excursion with dual air I use mine in the summer time to put out colder air. If you've ever been to Georgia in the summer months you know what I'm talking about.
To answer you question, No a chip will not alter your factory fast idle.