2000 Pontiac GTP: RPM Drop is scaring me

[Dannydboy77]

Hi everyone, I just signed up to this forum and this is my first thread ever.

My 2000 pontiac GTP (only 77K miles) is really starting to scare me. As I drive and stop at a light, my RPM's drop down to 0 and yet, the car is still running and I can still accelerate just fine. This happened every now and then, but yesterday as I was on the highway doing 70, the car jerked a bit (thought that it felt like the transmission downshifting or something) but then I look at my dashboard and my RPMs are at 0 again, and I'm still driving and accelerating as if everything were fine.

That said...recently my car sometimes does not start for a while. I turn the key and the engine seems to "turn over, or is it roll over" but it doesnt start and then after I try again or sometimes try 2 times, it starts. Getting worried about taking the car anywhere now as I don't want to get stuck.

I've done some research and saw that a guy with a dodge was having a problem similar to mine with the RPMs (except he could not accelerate) and it turned out he had to change his ignition coil.

Any help/advice anyone may have would be much appreciated.

 

[GtpKo]

I have a 2000 GTP but with 180k miles. I'm thinking cam or crank sensor. I believe the engine gets its RPM reading from the crank sensor. If thats getting bad it might explain why it wont start. Is your check engine light on? If so, can you get it scanned? If so, what codes?