Quote:
Originally Posted by yellow69z28rs
I had EXACTLY the same experience.
Then I added headers, cat delete, and crank pulley, then the butt dyno picked up the 60 hp and tq gain!
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Noticed after I've added some miles after the mod .. its pulling now. I think what happened was the ecu took some time to re map it self trimming the fuel and extra air that it is getting. It took me by surprise today.. i had it on 2nd gear from start sitting at a light. when i took off the back tires broke loose. I put down some serious smoke. If i hadn't let up on the gas i think it would have continued leaving a trail of white smoke all the way across the intersection.