So long story short. I bought a really nice condition and really well taken care of trailblazer ss that was about 4 hours away in another state. The previous owner was not mechanically inclined but put his faith and money into a shop. They installed a custom grind cam "with specs similar to a stage 2 NA BTR cam", pac springs, titanium retainers, long tube headers cat delete, and "tuned" it. I do not claim to be a tuner but I have built many cars and had quite a bit of experience with holley Efi. I can tell this tune is shit. I forgot to add that this guy paid for a "cow booster" which changes the drive by wire throttle response to be less variable and more touchy. (basically a way to trick people who are less in the know into thinking their car is faster because when you lightly press the throttle the truck jumps forward.) I talked to the tuner on the phone for about 30 min before I got to check out truck. He said it was a great truck, he just freshened up the tune, etc etc. he really seemed to know these trucks and I was very thankful he spent the time with me. That being said, If he thinks this is a good tune, im hesitant to do business with him.
Some of my symptoms are:
Horrible cold start, requires throttle input to keep running at first.
Overly choppy idle, almost like it doesnt have enough timing in it.
And the trans, hes got the line pressures very aggressive. Combine that with the "cow booster" and you have a truck that is miserable to drive in town.
So my questions are these:
1. He tuned it with EFI live, is that a problem for me because I bought HP Tuners?
2. The tuner claims that his "cow booster" product is not just a tuning adjustment, that he developed software to do it.
3. Does anyone have a cam only, stock or near stock map for an 07 trailblazer ss that I could have to start with as a jump off point?
Thank you very much.
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Originally Posted by mbray01
