hi i'm new here. i could really use some help. i have a 1972 bronco and i atempted to but fuel inj. on it. i went the wrecking yard and came home with injection off a 1989 crown vic. i got the complete harness ( as far as i can tell), manifold etc. i've been reading on the forums of what other guys have done. so i jumped right in. to my astonishment it fired right up first try. actually idles great. when i throttle it hard it pops out the intake. if i pull it out of the garage it starts to pop out the exhaust. at first i did'nt have my egr hooked up to vaccum. with it plugged into manifold vaccum it barely runs. i have tried differnet maps, dist, computer, coil, throtle pos sensor, and running the vaccum through the evr solinoid. i think it is the evr i am not acually sure. if anyone has a thought i would really appreciate it. thanks.
You do not want the EGR directly to vacuum. It needs to go through the EVR regulator. Make sure it is plumbed correctly or it can cause issues.
Popping out the intake is often a lean condition. Check fuel pressure.
As for the PCV crankcase ventalation it isn't nearly as critical with the speed density setup that the '89 crown vic is using. There isn't any air skipping past the MAF as there is no MAF. Remember this is an '89 crown vic, not a MAF mustang.
I would recomend checking fuel pressure, especially under load. That could cause the lean sneeze on the intake.
Also double check the firing order. I have had Ford V8s running completely smooth with 2 plug wires crossed.
The biggest issue I forsee is the posibility of the stock 302 not flowing the same as the donor engine. That is something to consider since you have a speed density EFI. It doesn't really know how much air is entering the engine, just calculations based on pressures and a preprogrammed lookup table. But the original engine should be close to the donor so I don't forsee that being too much of an issue.
Don't toss that EGR too fast. I have known it to get an extra half MPG or so if working right. Too many people are wanting to ditch any for of emissions control thinking it is all evil stuff. They just have been burned by bad stuff in the past or bad teachings. Did the crown vic have bad drivability issues? Then what is wrong with the EGR between the crown vic and the Bronco? EGR does more then just help control emissions. Like many things it's function is often described as a single function in reality it controls a lot of functions.