Hey all. I have an 87' Iroc with an l98 that was running rough so I was messing around with the MAF sensor. Thought maybe it went bad so I got another and plugged it in and it made it worse. So put the old one back in and I noticed the female connection on the MAF was not snug so I made sure it was plugged in good... Started right up and it feels a little better.. Responds better and the idle has improved but now I noticed the speedo is not working now!! Any suggestions or ideas would be appreciated! Thanks in advance.