and after a new cat, a new plenum, new plugs, new distributor, need cables, new coil. My truck just still seems sluggish and i dont why. All these performance part to top it off and i dont just get it. The truck irritates me sometimes but i love it to death

 

O2 sensors? Checked the cats?

 

mine did the same for years. Found small seepage leak on back side of thermostat housing. Replaced it when I did thermostat and it went away. The old housing was really corroded.

 

ya both the o2s are new and the cat was replaced a year ago. maybe im just to used to the get up and go of a turbo diesel ha.

 

Ya, bit of a difference in torque ratings there.

 

so ive discovered i have a blown gasket on one of my aftermarket headers, apparently....when i had the shop replace my cat, they stripped one of my header bolts putting it back on,,,which i guess after time blew out the gasket cause its gone or they never put back on. however, this cause a ticking sound on idle, cause its just air coming out of the header. Anyway could that cause a performance issue? im gonna fix it anyway

 

Depends on where the O2 sensor is, if it is after the leak, yeah, that can cause issues.

 

ya the leak is right where the header connects to engine on cylinder 1

 

That can give you trouble.

 

ya i figured. ill get it fixed