Strange hiss & ping noise at part throttle.

88 Fox GT

Active Member
Nov 18, 2002
1,674
0
36
Iowa
When I accelerate about 1/2 throttle or so, I will usually get a slight bucking along with a very light ping or clicking type of noise. If I go WOT, I don't really even notice it at all. I'm only using 10° timing.

Also, I hear a hissing type of noise coming from under the car somewhere while accelerating. I know it's not an exhaust leak, could this be catalytic converters?

Could both of these noises be something to do with the cats? It's really annoying sometimes.
 
Zero_chance said:
Could be a misfire. Whats the age/condition of your plugs, wires, ignition, etc.
I'm not sure. Same plugs & wires that were on the car when I bought it a few months ago. The plugs are Autolite platinums, which I know are garbage.