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  1. S

    Bad gas mileage

    Ok here is the deal. I put on a set of long tube headers and now my gas mileage sucks (13/mpg) I was doing around 20 before my cats clogged. I did not replace them. I pulled the codes the only one I get is 96 for the fuel pump relay which I replaced. I have also replaced the egr valve the fuel...
  2. S

    MPG/EGR/SMOG PUMP

    I have a mostly stock 93 5.0, long tube headers, off-road X pipe, cold air intake. I had to remove my cats because one was clogged. I put on a set of flowtech long tube headers and an off road X Pipe (there is no return exhaust from there headers). I left on the smog pump (it is not hooked up...