floor board thump!!

[DiscountPowerParts]

Thanks! Its in stock trim now. Still runs like a raped date though.

 

[mjstef]

don't run w/ the a/c on. i use 4-80 air.... only just noticed it once it turned cold and i turned on the heat. today, no different. i thought a troll was under the floor trying to get in...-mad

You A/C compressor runs when the heater is on..................................

 

[bushpilot]

the compressor runs in max a/c, a/c, BI-LEVEL (dash/floor) and in the
defrost modes.

 

[F350DRW1]

Check the front exhaust mount under the skid plate on the pass. side. Some MBRP exhaust's have a mounting rod that slides into the stock rubber grommet, and its about 1/4 longer than it should be. i can't really explain this well enough, but if you peek under there, you will see what i mean.

 

[no-red 6 0]

stopped in at dealer today. he said vacuum slap is normal. it is a good thing. i said some seem way louder than just normal... he said could have a vacuum leak, does my heater jump around from floor/dash/defrost? i said i have not noticed. he also said to check if the shift on the fly 4 wheel locks in, if it does not then there is a problem. i will keep an eye on it. just wanted to pass along the diagnosis for all to look for as well.