When i got the car (88 formula) the idle fluctuated quite a lot the egr needed replacing and the exhaust manifold would glow. I replaced the egr tube and valve replaced my ground wire (as well as added a second one) and now it idles fine but it still glows orange and i cant figure out why. My thought is its because a sensor is getting a wrong reading? Maybe because it went bad or a vacuum line has a leak and its causing it to run lean? Any ideas? Thanks - Dave

Definitely a lean condition.
Many causes, more than likely a major vacuum leak.
Or clogged injectors.

I had the same--O2 sensor.

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Pat Jones

Thanks! It was the oxygen sensor. Exhaust looks normal. But now it has a high idle around 2k. Any ideas?

Burnt/leaking exhaust valve will cause red exhaust manifold. Try to pinpoint the cylinder that it glows red around and do a compression test - it should show up there.