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Hello All. I am 2,000 miles from home and have noticed a new sound that I am in need of diagnosing. When stopped (for example at a red light) in drive RPM's are around 675 to 678 depending on the A/C. This is normal for my vehicle. However, their is now a very ever so slight new nocking sound just barely noticable when under those conditions. Acceleration clears it up and absolutely NO other noticable differences. I am thinking an injector that is dirty is starting to make itself known.
Any thoughts? Or could it just be that it is indeed normal and I am just paranoid and goin' nuts....as has happened before.
Could even be something as simple as the fuel quality where you are, altitude difference, or like you said just paranoid. Enjoy the trip and don't worry about it until you get home.
I agree with Pocket... Fuel quality or air in the fuel system will give you a sound like someone is tapping the block with a ball peen hammer. Nothing to worry about.
Could even be something as simple as the fuel quality where you are, altitude difference, or like you said just paranoid. Enjoy the trip and don't worry about it until you get home.
Possibly....every fuel stop east of the Mississippi has been Conoco/Phillips 66 on I-44 or I-40.....no mom and pop small turn over places.
Altitude right now here in Gallup, New Mexico is 6,600 feet. The highest I have ever had the truck up to this point in time is 3,322 feet in the West Virginia mountains on the I-77 turnpike.
I agree with Pocket... Fuel quality or air in the fuel system will give you a sound like someone is tapping the block with a ball peen hammer. Nothing to worry about.
Just wonderin' how I would have ended up with air in the fuel system.....but that sound is just about it....just when low RPM's.
Sounds like air or paranoia will destroyya. Try having your truck get stuck in high idle no matter what setting the chip was in and 1200 miles away from home. Sweating hard. Shut it down and restarted and all was well.
Possibly....every fuel stop east of the Mississippi has been Conoco/Phillips 66 on I-44 or I-40.....no mom and pop small turn over places.
Altitude right now here in Gallup, New Mexico is 6,600 feet. The highest I have ever had the truck up to this point in time is 3,322 feet in the West Virginia mountains on the I-77 turnpike.
Hey we just did that route in June. Let us know how it sounds in Flagstaff at around 6600!
I'm in albuquerque, if you are headed this way and you need any help let me know. By the way, I have used my hydrometer to test fuel at all the truck stops between here and Phoenix and down to Mexico. I have found good and bad fuel at every stop. It doesn't seem like any place is any better then another on any given day. The only local producer is Giant/Mustang. Giant is the only supplier that has a refinery. They use strictly top of the line crude because that is the only oil their refinery can handle. They are usually a little more expensive, but my truck likes their fuel.
Just wonderin' how I would have ended up with air in the fuel system.....but that sound is just about it....just when low RPM's.
Doesn't that sound like the classic "mystery knock" on the #8 drivers side injector that Ford tried to fix with the special "long lead" injector? I think that sound comes and goes depending on oil and fuel temp in the galleries in the head, air in the fuel, etc... Have a good trip, and make a run up to the "big hole" when you get to Williams, and spend the night in one of those 50's style motels on the strip of old route 66 there, which BTW I traversed when I was only 16 years old in a 56 Chevy that was only 2 years old at the time.
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