Ladies and Gents I have solved the riddle. My 94 3.4L received an entirely new braking system.....(save the ABS module). After securing the vacuum system to "tight as a drum specs", I was confused that everytime I tapped the brakes.....number one they felt soft, number two me and my brother in law bled the brakes with 96oz of fluid, thirdly the check engine light would come on. I tried to read the codes......but the computer refused to go into diagnostic mode. VERY FRUSTRATING TO SAY THE LEAST.

To make a short story long.........I forgot to change the power brake booster check valve.............I changed it yes......and the system was even tighter.......but still just off. Thats when I saw the fitting on the vapor line going into the purge valve. It's discontinued, so I used a piece of 1/4" fuel line and slid it in place. It was a tight fit...but it worked. At that point I reset the computer.....drove it around all day.........and would you belive, the vacuum was tight-the power brake booster worked properly.......and the best part.........NO MORE CHECK ENGINE LIGHT!

I rest my case......the 3.4L REQUIRES a COMPLETELY TIGHT vacuum system in order to function within parameters.

 

Just so you don't feel bad, I have yet to see any car that liked vacuum leaks. lol

 

Yes I saw that i spelled brakes as breaks.....thats what happens when there's an ex-wife in one ear, and a screaming kid in the other....LOL

 

Yeah man.......very true....I've just never seen one this picky. Maybe my girl is just that way..........now that I think of it, all the women in my life are that way.....lol.

 

What, they all have vacuum leaks? Now gas leaks, that I can understand.