Car:
1998 Grand Prix 3.8 SC (supercharged)
NO mods other than unplugging the boost sensor and running by vacuum and replacing headlights with spiders led halos or whatever you want to call them didn't cut the harness it was a plug and play type thing.
Issues:
There seems to be three issues that might be related and all came up around the same time. I first started noticing that the car would race at stop lights. When i was stopped and sometimes when i started the car up it would go to around 1.8K RPMS and just stay there. (this was when I unplugged boost and seemed to work, for three days after that same issue again) I had an issue like this before, replaced my coolant temp sensor fixed vacuum leak and it was perfection. That time the SES light was on and throwing a bad coolant temp sensor code. This time didn't quite work didn't see a vacuum leak on my quick check and code for coolant temp sensor isn't triggering the SES light.
The second thing that started to happen was looked like my radio started to short out, but when the car is hot not when its cold. When the car is warmed up the panel of the radio would flicker as if power was surging and coming back. No other lights did anything nothing on the dash nothing except for the radio. The radio is aftermarket had it installed 1 1/2 now and this is the first time seeing this issue.
Third, just noticed this yesterday and afraid there is something thats going to cost me A LOT. The temp guage, while driving, dropped to nothing and then picked back up. say it was at near 210 the gauge would drop to basically a nothing reading, and then within a minute it would go back up to read something like 180.... Now I know i might not have given a lot of info but anyone with any ideas on what I can do to troubleshoot and to see if this issue is really going to cost me please help. I am willing to post all my findings and I greatly appreciate the communities help!
