i bet its your + cable grounding on the egr.

theres two nuts that hold the mega fuse asembly to the valve cover and also suports the + cable maby they came off and now the cable is lose.

98 svt sil/blu 3.0 oval heads full P&P, msds headers,bat kit,2,1/2exhaust 30 inch glasspack and 2 spintech mufflers 14.78@94mph with my mechanical arm i can shift gears in less then a twentieth of a second for sale $7000