88 bronco 302. Has code 33 and 46. I tested the egr for vacume and there is none. I took the line off right from the source where there is a electrical plug in. The other vacume line right below it has air coming out of it but the green one for the egr valve has nothing. Is it the black piece they go to bad or do i gotta go further down the line somewhere. And i think 46 is something to do with fuel hoping it just needs an o2 sensor on the y pipe or something. Right now the truck when you start it has very high idle at like 1500 or so and if you just gas it a little and let off it will go down to about 600-800 and sometimes its smooth other times it shakes pretty good. And if you really step on it it kinda falls flat on its face and then when it catches up with itself its like ***** out power. Ive never had a 302 or done anything with egr so im clue less. The only testing power tools i have is a test light.

 

Sounds like u got air leaks to me. U should test all the hoses. The hoses on the tab and tad need to be tested 2. Test the egr with a vac and multimeter. Engine vac and vac can also. 17-22 is preferred on engine vacuum.

 

U should have vacuum not positive pressure, I bet the tab or tad valve is stuck open. Tape them with the end of a screw driver and c if that helps.

 

Can you explain these parts a little better please. Sorry i just dont know what any of these parts are or how these systems work i have never touched them before.

 

EGR=Exhaust gas recirculation
Test the egr first, I hope u know what this 1 is. If not google it. The only way I can think ur getting positive pressure is that 1 of the valves is stuck open and has a bad diaphragm. What is engine vac?

 

tab=throttle air bypass valve
tad= throttle air diverter valve
Test the vac hoses 2 these two valves. Than pump all 3 valves to 7-10 in.hg,they should hold vac.