| I bought the HP racing header with cat and i'm experiencing some lagging. Let me explain:
After installing the header, which was super difficult, I connected the o2 sensors without the o2 sims that they provide. I was dumb and didn't know what they were for, and it was late. Regardless, the header hit against the front frame of the car and would vibrate when i braked or when the engine moved forward. So, I removed about a 1/4 inch of frame, melted it off with a torch, where it hit; no biggie.
Vibrating solved. When I drove the car things were fine, no lagging at all, but then after a day the engine light came on. So I call HP and ask them what the little boxes with wires are for and why they are needed. I find out they are o2 sims and trick the engine, and without them my car will lag.
So, i install them according to their directions, but the directions don't say which white wire to connect the o2 sim to since there are two white wires coming from the o2 sensor. So, i connected it. Reset ECU. But know after three days of driving, including freeway driving, the car lags. It seems as if it is not getting enough gas.
I call HP and tell them. Damien, the guy at HP, tells me that I might need a Super AFC fuel 'something or other' in order to opent the fuel line more and for longer.
I decide to give it another day or two, thinking that maybe the ecu is dumb and that it'll adjust to the new extraneous amount of exhuast. Today, the engine light came on!!
Help. Logically, it must be the o2 sims because it was not lagging before i put them on.
Anyone experience this? Did i install the o2 sims wrong?
Also, the header had two locations on the primary tubes for o2 sensors and a third on the "cat" itself. HP said you should plug one. DUH!!! but they don't provide that, and Damien said that a spark plug works. I can't believe they don't provide something to plug the second 02 sensor location on the header
Last edited by ManUtd0018 : 01-16-2005 at 10:42 PM.
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