For the past month or two I have been trying to track down a tapping sound that seemed to get louder as my truck warmer. I have now discovered that it is coming from the injectors. Is it normal for an injector to make a fair bit of noise or is this a symptom for some problem coming up. When I drive I can hear the sound fairly loudly in the cab. I looked down the throttle body and both injectors seem to be spraying a nice pattern.
thanks