Pull the vacuum hose off the fp regulator. If you see wet gas in the hose,or coming out of the regulator, your FP regulator is bad and leaking.Its also putting raw gas into the intake through that vac hose.If it passes that test,plug that vac hose and run the car/drive it,if the surge is gone,either the regulator isnt working well/isnt getting sufficient vacuum or your fuel delivery is down due to blockage in the lines/dirty fuel filter or weak fuel pump.All this is contingent on the missfire problem being solved.
if you used the original wiring harness you should still have the scan tool hook upit looks like this, http://www.extreme-check-engine-light-codes.com/Ford%20OBD1%20Decoder.htm and you can read the codes with just a test light
we hooked it to a computor today only codes was like no egr signal because it was removed and fuel code because its not wire in the harness nothing about my problem thanks for the site though. we checked the regulator today pulled the vacume line off like you said and it was dry. we didnt try to plug it off and drive it though, i will try that tomorrow.
we thought we did but you can but you can still remove the wire with no change. at this point im not sure whats going on. have fire have gas have compression but nothing.................
What kind of numbers did you have for compression on all cylinders.Was the suspect one considerably lower than the others by comparison??? a weak cyl will cause the engine to run rough.You get a nice bright blue/white spark right.If its orange,its weak leading to a bad coil/bad wire, crusty dist cap terminals etc...i still think you have a dead plug.All it takes is for someone to drop a plug on the ground once.They get handeled poorly from the get go once manufactured...As for the surgeing:get the engine up to operating temp and unplug the IAC,then douse it with water/carb cleaner if the idle changes the IAC is leaking internally(vac leak)or it has carbon build up on the pintle(causing it not to close all the way).you can clean em out to a degree.This may be your surge if all else checked good.Good luck,hope this helps you out.
i just fixed a car at school, it had good compression, fuel, and spark, but no BANG!, pulled the valve cover and found the rocker arm just laying there on the bottom.
which rocker was loose??? intake or exhaust??? If the intake valve does not open,it gets very little fuel/air to build compression in that cyl bore.If it was exhaust,compression will be good.This guys compression is good.you may be on to something though(I love alternate perspectives!!!)
