The Emperor is back in the garage again tonight. The original theory of a timing issue because of the previous shop needing to get under the timing belt covers to change the Crank Position Sensor didn’t pan out. Turns out that sensor sits outside the cover so there would be no reason for them to be inside the cover.
Yesterday evening’s new theory was the fact that I was a quart low on oil so that the VVT was not working all the way and that would have caused the CEL, the slight hesitation and possibly the louder exhaust sounds. When they suggested this to me I tried, maybe not to successfully, to hide the incredulous expression on my face. Their plan for today was to test drive it before adding oil and then afterwards to see if that had any effect. I said, “Go for it.” I mean, what the heck, can’t hurt.
I didn’t get any phone calls today from the folks at AW, so on the way home today we stopped in. They had gotten busy and didn’t have a chance to get to my problem, so when I showed up Holley said let’s try it. He added a quart and off we went with him driving. They had cleared the CEL and I have to admit I felt no hesitation and maybe the exhaust note was a bit less. At the halfway point, we swapped places, and I drove it back to the shop. No light, no bogged down feeling, but still just a little louder than this old fogey would like at wide open throttle. Holley said, “Let me run a full bead all the way around that resonator and you can take the car home. The exit prescription was to change the oil and if the CEL comes back on, bring it back.
Miata Top Transitions since 06/25/15: 163