135,000 miles, '01 Grand Marquis 4.6. Just today started jolting on accel from a stop or a coastdown, gives a double bump then takes off. Small delay on accel, speedo is starting to register while car is still sitting then it takes off. I've looked at the dampner looking coupler at the front u-joint and its not slipped. It has no codes and the fluid is clean and red. I won't be able to get it up in the air til Sunday, any ideas on what might be happening? Thanks!
 |
-
-
could be rear diff... could be tailshaft... definitely something to get fixed sooner than later.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73Originally posted by dmccaig -
Slightly different animal, but when my '79 Squire started doing that, it turned out to be the C4 slipping.2012 Mazda5 Touring | Finally working on the LTD again!
Comment
-
The speedo reading while the vehicle was not moving is what has me. That sounds more like something wasn't transmitting power between the tail of the transmission and the wheel. Not much in the middle there, driveshaft, axle shaft, and the differential itself.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
-
A little searching has me thinking its a bad coil.Comment
-
ive seen those coils go bad and do some funky stuff. it is a possibility. the speedometer reading is wierd though.....and are you feeling a clunk, or just a little bump or hesitation?1996 Mercury Grand Marquis - duals, PI cams, PI intake, J-Mod, MZT, BOC tune, 3.55s, 18in wheels
1965 Ford Falcon Ranchero - 5.0 HO T5 Fun Cruiser
http://www.supermotors.net/users/tmm313Comment
-
Coil-on-plug (cop) set-up?'79 Continental Town Car
'90 Crown Victoria LTD
'94 Crown VictoriaComment
-
I'm pretty sure its a coil now. I drove the car from a cold start this am and I had to go 35 miles before it started, and now it breaks down when I load it against the brake. I replaced three last year, prolly should just do the other five now and get it over with. I'm sure glad its not the trans!Comment
-
Eight separate ignition coils? That sounds like a huge maintenance nightmare right there.2012 Mazda5 Touring | Finally working on the LTD again!
Comment
-
they last a goodly long time, usually past the 100k mark. At least when one craps out, you still have several other cylinders to get you home on. Single coil ignition is all or nothing. Also, no spark plug wires to ever replace.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
-
Found the #6 coil tube coated in oil from the coil itself. Replaced it and problem solved. I was told that a shorted coil can sometimes feed voltage back thru teh harness, causing issues with the pcm, thus the appearance of a trans problem. No miss or codes found like last time a coil was bad is what had me going the wrong direction. O'Rellys had the coil for $38, took 2 minutes to change.Comment
-
Glad it was only a coil.Grant
2000 Grand Marquis 145,000 mi.
No modsComment
-
Cool. Interesting how it made the trans feel funny though. The only Vic I've ever seen with a dead coil ran and sounded exactly like you'd expect for a V7. It had a dead miss, but was otherwise normal acting. I think it was the #6 coil on that car too now that I think about it.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
-
Right, but when was the last time someone actually got stranded due to a dead coil?Originally posted by gadget73 View Post2012 Mazda5 Touring | Finally working on the LTD again!
Comment
-
raises hand
1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)
please be patient, rebuilding an empire!
Comment
Comment