[Beav]

Good - I'm not certain how the EGR is ported to eaach cylinder in the SVX but on some cars there are individual ports that can clog. Here's how their problem manifests: if you have a six cylinder engine imagine what would happen if three or four of those ports were to clog up. The excess EGR flow is pushed into the remaining two or three ports, causing misfires of varying degree on those cylinders. This only happens when the EGR opens, which is at above idle speed when the engine is warm. The problem is less noticeable at higher engine speed and throttle opening. Since there would be flow there wouldn't be an EGR code. That is why I wanted you to pull the hose off. A quick, easy check.

You might take a peak at the MAF to see if it has collected some oil or garbage. A quick spritz with some carb clean (on the sensor wire inside the air tube) may be the cure. Be gentle, they are frail. Remember at around 80% to wide open throttle (WOT) the MAF isn't used and isn't a part of the picture.