Greetings,
Recently had an issue where the truck wouldn't run. Replaced the HFCM but didn't resolve the issue. Found the main supply line had a leak to the HFCM. Fixed the line and the truck is running as before. One thing I noticed after fixing the issue is a loud buzzing noise. It happens when cold during the glow plug warm up before crank. It seems to be coming from under the hood on the drivers side. It only lasts for a few seconds and doesn't reappear until starting the next morning after the truck has been sitting. Any ideas on the culprit?
Thanks,
Chris
Recently had an issue where the truck wouldn't run. Replaced the HFCM but didn't resolve the issue. Found the main supply line had a leak to the HFCM. Fixed the line and the truck is running as before. One thing I noticed after fixing the issue is a loud buzzing noise. It happens when cold during the glow plug warm up before crank. It seems to be coming from under the hood on the drivers side. It only lasts for a few seconds and doesn't reappear until starting the next morning after the truck has been sitting. Any ideas on the culprit?
Thanks,
Chris