This car has an erratic starting problem. Sometimes it starts fine and sometimes it takes a long time. It does not matter if the engine is hot or cold. After starting, the engine runs fine - no obvious problems. The check engine light is not on. I took it to a garage who told me that the problem was that the knock sensor wiring was chewed by a pack rat. OK, but I do not understand why a problem with the knock sensor would affect how the car starts. I thought that detected knocking from the engine would only adjust the spark timing. Also if there is a problem with the knock sensor shouldn't the check engine light be on?

Anybody know anything about this?

Also, does anybody know where the knock sensor is located?

Thanks in advance