Crown Vic STILL Stumbling/Cutting Out/Jerking! Request HELP!
Yes, I am still having this issue. I tried to revive my old thread, but maybe this is a better option. Anyhow, I am posting the original issue, along with my update. ANY help at ALL is appreciated more than you know!
I have a 1984 Ford LTD Crown Victoria (5.0, CFI) that has an issue with what you might call either "cutting out," "stumbling," "hesitation," etc. At the advice of a mechanic friend of mine, I have replaced the plugs, wires, distributor cap, rotor and now the Fuel Filter. Seems like it might have helped, but only slightly, if any.
What will happen is this.....
The car will be cruising along in over drive, going 45 - 55 MPH (although, it will do it at any speed), but say if you step on the gas slightly on a flat spot or you start going up a hill, the issue arises then. Before the car drops down to a lower gear, the jerking and hesitation happens. But, as soon as it drops down, no issue at all. I do know this car (from the beginning in 1984) has always needed some help to drop down into a lower gear if it is in over drive, especially in cruise. I don't mind that, but this seems to be a completely different issue and it's kind of starting to get on my nerves!
UPDATE: New fuel filter did not help the problem, although it was good that I replaced it. Brown colored fuel came out of the old fuel filter when I drained it. Now, it is possible that a fuel issue might still be possible.
I just don't understand why the thing will stumble and jerk like a son of a buck before I make the thing down-shift. I can be going 50 mph, start to go up a hill (keeping the pedal held in the same as before) and before it down-shifts to third, it just stumbles, cuts-out and jerks around. I put in the pedal a little to get it to down-shift, and bam! The stumbling goes away.
If the problem is fuel, why doesn't it do it all the time? Maybe it's the "heavier load," but why is it only rearing it's ugly head then? So, maybe it's in the distributor.... also, is there any chance it could be the actual fuel pump?
One reason I am getting to the breaking point on this is that my usual mechanic was "unable" to find the problem. I don't think it's that hard to get the car to do it, but maybe if you aren't used to driving the thing.... he suggested replacing the distributor, and because I have known this mechanic for so long, I feel I can trust him. I can put in the distributor myself, but I just get the feeling that's not it. The distributor is the TFI type. It throws/stores no codes, so that is no help either.
Back in 2000, my dad (yes, it was his car before it was mine) had the EGR valve, EGR sensor and TPS sensor replaced all at the same time for a slightly different issue. Back then, the car would be in cruise, and the thing would cut out and jerk like crazy. It got progressively worse, until all of the above were replaced. I am uncertain if it was necessary to replace the TPS sensor at that time, but I am thinking that the TPS sensor might possibly be what is causing the issue this time around. I saw something like this issue on another forum, and the TPS sensor was bad for that guy. Thought maybe, just maybe, that could be it with mine as well.
I am just hoping maybe someone will read this that has either had this same issue in the past, and/or knows the "cure!" Any ideas? Thank you in advance! :)
1984 Ford LTD Crown Victoria
302, 5.0 Liter V8
Central Fuel Injection (CFI)