please help Block off smog pump or not?

D's 91 stang gt

New Member
Jul 6, 2005
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I don't have a smog tube that connects the smog pump to the x-pipe long story but what I need help with is the smog pump has an opening there were the tube goes should I just block it off??? will this hurt any thing also could this cause the car to run bad or rich as in my case please help with the block off question thanks
 
I have mine blocked off, i just used an old spark plug for now...i was running with out the pump but was told the cats would get too hot an burn out...i even got my car to pass ohio e-check with the smog tubes on the heads blocked off but with the pump connected to the cats.
 
If you try to cap the discharge port on the smog pump, you will end up either blowing the cap off or damaging the head of the pump.

Assuming you have no cats, you could run a hose (3/4" ID heater hose fit fairly tight for me) with a breather on the end - it would help keep debris from getting in there. Or delete the pump (for off road use only ;) ).

Good luck.
 
Is the smog pump hooked up to the belt and blowing air? If so, get a smaller belt and bypass the pump. Then you can cap off the pump and exhaust pipe. If the pump is hooked up, the cap will blow off or damage the pump as HISSIN50 says.
 
smog pump delete kit ;)

Or as mentioned above, block the pipe off @ the X-pipe (I used a bolt and welded mine up) but if you leave the smog pump hooked up...let it vent..don't try to block it off