Signs of a bad distributor? Help!
I have a 2000 Xterra 118,000 miles (190,000kms). About a week ago, it stalled in a parking lot after starting. After a couple of times doing this, I took it in and mechanic is stumped by lack of codes. Only a knock sensor. There is no check engine light. Got the car back for a week with nothing unusual happening. Feeling optomistic it was just bad gas or something, stalled again. Today is bad and now in the driveway, can't get it started anymore. It deteriorated very quickly today. It will fire, run really roughly then die. On subsequent starts, it won't catch. In the last few days, I have noticed that the rpms after start initially go to about 1800 then drop to 1500 then 1000 then to 800 after a few seconds. Today, it just drops below 800 immediately then dies. At one point, when trying to hold a steady idle, the rpms fluctuated about 200 rpms before stabilizing. Now, it won't start at all in the driveway. I have read a lot of threads and internet stuff and there is talk of cam sensors, MAF sensors, fuel pumps, etc. What does a distributor failure look like. Should that be place number one to start since there are no codes?