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Old 05-21-2010, 07:42 AM
gizmo-1948 gizmo-1948 is offline
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The next thing to check would be all your wire connections, make sure that all the connectors are completely snapped in place, and that none of the wires have been pushed out, especially at the distributor. Next, I would unplug the EGR valve at the valve and plug the hose with a golf tee or similar and take it for a test drive to isolate that system from your problem, new parts or not. If problem persists, I would attach my timing light, leaving the by-pass hooked up, vary the RPM and confirm that your timing is changing. If I remember correctly, when you hook the by-pass wire back up and recheck timing, it should be sitting on about 10 degrees advance. If the timing is not changing, except for centrifugal at higher RPM's I would suspect the ignition module.
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