Just got this FXT, 150K on it, and it has a couple small issues I need to iron out before I start making it pretty.
First one is an idle issue. When I'm sitting at idle, it idles fine, other than a strange diesel noise that seems to come from under the rear driver's seat. After I 86 the resonator (I hope it's a resonator, it's huge) I'll worry about that. If I stab the clutch with the revs up though, the idle will drop to almost stall, then skyrocket to near 2K, then settle to about 900, then back to the 700 I normally see. I pulled the beauty cover to find the IAC and clean it, and found no throttle cables, so I'm assuming no IAC either. Ideas?
Problem 2: When I've got the throttle just cracked, say downhill, but not engine braking, the car surges. Does it with my foot and with the cruise on, like I'm feeding a bit of throttle, then closing the plate, over and over again. Could this be related to the above issue?
Problem 3: Power under boost is pretty much never the same. Some days it pulls clean to redline, some days it seems to pull slow to redline, some days it just jerks lightly from about 3200 until it freaks me out and I shift. I've been short shifting to avoid it, which negates the purpose of having a turbo car. I have found that if I aggressively downshift, into boost, and hammer the throttle, it pretty much always seems to pull correctly. I checked the IC piping, seems to be in order, but other than that I'm clueless. 5000 feet, 91 Conoco is the best we've got here, new air filter in it. Can't find the fuel filter, in the tank maybe?
Sorry for the monster post with multiple questions, but I feel these all might be related. No CEL by the way.
First one is an idle issue. When I'm sitting at idle, it idles fine, other than a strange diesel noise that seems to come from under the rear driver's seat. After I 86 the resonator (I hope it's a resonator, it's huge) I'll worry about that. If I stab the clutch with the revs up though, the idle will drop to almost stall, then skyrocket to near 2K, then settle to about 900, then back to the 700 I normally see. I pulled the beauty cover to find the IAC and clean it, and found no throttle cables, so I'm assuming no IAC either. Ideas?
Problem 2: When I've got the throttle just cracked, say downhill, but not engine braking, the car surges. Does it with my foot and with the cruise on, like I'm feeding a bit of throttle, then closing the plate, over and over again. Could this be related to the above issue?
Problem 3: Power under boost is pretty much never the same. Some days it pulls clean to redline, some days it seems to pull slow to redline, some days it just jerks lightly from about 3200 until it freaks me out and I shift. I've been short shifting to avoid it, which negates the purpose of having a turbo car. I have found that if I aggressively downshift, into boost, and hammer the throttle, it pretty much always seems to pull correctly. I checked the IC piping, seems to be in order, but other than that I'm clueless. 5000 feet, 91 Conoco is the best we've got here, new air filter in it. Can't find the fuel filter, in the tank maybe?
Sorry for the monster post with multiple questions, but I feel these all might be related. No CEL by the way.