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I thought I should be around 20. Oh well at least it is steady at 16.5 and does not fluctuate. Looks like I need to see if the valve timing and ignition timing are OK. The car has 121,000 miles and the timing belt was changed by the previous owner at 75,000 miles. Maybe I will replace that...

Thanks for the link. From what I saw it could be late ignition timing. Looks like the one thing I didn't check could be it...

I had a wideband question since we are on the subject. I placed my O2 sensor at the 11 o'clock position on my downpipe and proceeded to fish the harness through the firewall. I tried to be as careful as I could... I am getting LAMBDA as 1.00 and AFR as 14.7 all the time with no value...

Just wondering what my boost controller should have as a vacuum value when the car is idling? It looks like around 16.5 (a little past the 16 hash mark). Is this normal? Why I am asking is the car idles a bit rough (misses). Thanks, Sal