I've posted about this all over the place. It used to just have a hesitation around 60mph and then a couple weeks ago a bit of a bounce at cold start idle. I took off the ECM and cleaned the throttle body, replacing the MAF at the same time--just the sensor module itself, not the body. After doing t...

1999 S80 NA model. ~200k miles, all routine maintenance has been done. If you don't want to read the long description, the short version is that I cleaned the ETM and changed the MAF and a portion of my problem persists, could it be spark? The issues I had been getting were that right around ~60-70m...