99-3.8, Engine stumbles at Times

[Rolm]

An update, I did try to clean the Mass sensor and it made it run worse, even though I was disappointed I was also encouraged that I was on the right track. I went to our local bone yard and to my surprise, I found a 2000 Impala with the complete engine I removed all the sensors just in case and once I replaced the mass sensor that was it the engine is running perfect. I guess spending the $10 to have the code read was well worth it. Toronto Guys if you want my old Mass sensor it’s yours maybe you may be able to clean it and make it work. Thanks to all for your input.

[maxwedge]

Make sure both seals are in place for the map sensor/pcv valve.