U-joints? If bad wheel bearing, usually you will notice when you are along side a retaining wall or another vehicle or something that will cause the sound to echo back to you. Then you can notice if left or right side. On mine, I have three very different sounds: On the gas Off the gas In between on...

Does it go ... chunk chunk chunk?
Does it go ... whine whine whine?
Does it go ... wwwwhhhhiiiiiiiiinnneee???

Is the sound steady or hit / miss ?

M~

A) I checked the PVC. OK.
B) If the timing chain was worn, I would be getting spark scatter with the timing light. But I'm not.
C) Don't think it is the gas. Many tank fulls from various stations.
D) Carbon. Possible.
E) Could give it a try on the 92+ hi-test.

Welcome ! ! !

While you are getting some pics, how about filling in your signature and etc. so others who may be nearby (or far away) can keep the gray matter stirred-up.

Been having a lot of problems with knocking under anything but idle. Checked the timing, was at zero*. Even using mid-grade gas. Already changed out the knock sensor. And recently put in new cap; rotor; plugs; Summit Hi-output coil and 8.5mm wires. Changed the timing to 2*-3* after zero. Much better...

See my sig...

I've got the fiberglass and overload mine all the time. No evidence of a problem. See my sig.

Welcome ... back.

I'm in the same time zone as you, see my sig.

Wednesday 12:36pm Eastern Daylight Time
Not peppy at all.
Not as bad as some days.
Slow enough to be a PITA.

I've had the tab break off inside the cig-liter and cause problems.

I just hate it when someone comes outa nowhere and gets all techee on us...

Is that where it is mounted?

Mine is way down in the belly of the compartment.

Mine quit working 10+ years ago and has been unplugged ever since.

Friday 8:30am Eastern Daylight Saving Time
Yep, back to being peppy.

BLAZER wrote:...I have personally pulled a 16" trailer with a car on it, probably...

Yep, I could see that a 16 inch trailer would be no problem to tow.

The test port is easy but it only gives you the temperature by osmosis. The fluid slams up to the sending and stops moving. There is no fluid flow to read. The best location is the out line. That fluid just left the TC.