What the Sam Hill is this??

[Daryl]

So, poking around the engine bay, checking fluids, etc and noticed THIS. It’s uncovered and I don’t know if that’s ok or not? Also, due to the fact it’s open facing forward, I’m wondering if crap can get in there that’s not supposed to! It’s on the passenger side adjacent the last 2 exhaust ports rearward.

 

[Makoto]

looks like some emissions bullshit.

 

[RAU03MACH]

Part of your emissions where the smog pump should be
On it
But somthing is missing on that end

 

[Daryl]

…and I live in Cali. Smog check stations gonna have a ball with me :-(
No offense, but I hope it’s something else!

 

[RAU03MACH]

Plug that hose back on

 

[Daryl]

Part of your emissions where the smog pump should be
On it
But somthing is missing on that end

Well that just sucks! When I had the rebuilt motor put back in I was VERY specific “ it has to pass smog”. A simple request,”build me as much power and still pass smog”. Hell, it’s even got all FOUR catalytic converters, per stock.

 

[Daryl]

Plug that hose back on

Where does it connect to from there (ie, from where the photo shows)?

 

[RAU03MACH]

That hose should be put back on

 

[07GtS197]

Like others have said it’s for the smog pump. It’s a check valve for the crossover on the back of the heads. It’s not really needed but might throw a code. That hose that’s just lying next to it connects it to the smog pump.

 

[RAU03MACH]

That goes to the smog pump

 

[RAU03MACH]

Check to see if your smog pump is on the car

 

[Michael Plummer]

Air crossover tube.

https://www.stangnet.com/mustang-forums/threads/1995-gt-thermactor-question.908486/

Good luck
Michael Plummer

 

[Daryl]

Tube was just tucked under out of the way. Schew!!
Hard to see, but other end attaches back side down low. If you trace the red suspension bar, you can just make it out!

 

[RAU03MACH]

Very good

 

[RAU03MACH]

Now watch the performance drop

 

[Daryl]

Thanks everyone… major pissed off panic session avoided! Is it too early for a beer?!

 

[Daryl]

Now watch the performance drop

Ah, give me a moment of relief, huh?! ROFLMFAO

 

[RAU03MACH]

I unhooked all of mine
More crap on the engine than needed
No worries

 

[Michael Plummer]

I'm assuming your heads are emissions rated. You'll find one hole drilled and tapped at each end of your cylinder head. If you're not using any emission/thermactor hookups you should plug the hole at the back of each cylinder head. In an emissions-exempt vehicle, the rear holes may have been left open or unplugged by mistake because the person simply didn't know it was an exhaust leak. To plug the holes, you can visit your local bolt supplier and get 5/8-11 x 3/4 stainless steel bolts and apply a good thread sealer because the bolts are pretty coarse.

I also believe you can buy the plugs that Ford uses but I don't have the part number for those at the moment.........Found it: OEM Ford 5/8-inch blind hole insert (Ford PN 351418-S).

Good luck
Michael Plummer

 

[Michael Plummer]

In case someone is interested

NOS 1994 Ford Mustang Thermactor Plug Insert F4zz-6e086-a 351418-s for sale online | eBay

Find many great new & used options and get the best deals for NOS 1994 Ford Mustang Thermactor Plug Insert F4zz-6e086-a 351418-s at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Good luck
Michael Plummer