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Ford Crown Victoria and Mercury Grand Marquis

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What is this discussion about? Ford Crown Victoria, Mercury Grand Marquis, Exterior, Sedan

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#981 of 3244 Re: Bilstein rear shocks - martens - by harmar Jun 29, 2001 (9:03 pm)
After 27 years of driving FWD cars, I upgraded to an'00 Marquis. One of the first differences I noticed was the rear "hop." I, too, looked into Bilstein, because I'd put them on a motorhome and they improved everything drastically. I ended up doing nothing, 'cause a buddy who has owned GMs for years drove mine and said it's "normal" for them. The Bilstein people did caution me NOT to used their heavy duty shocks unless I towed or carried consistent heavy loads. They do accentuate the "hops" on normal loads. Good luck!
#982 of 3244 Bilsteins & such by mrf Jun 30, 2001 (2:50 am)
harmar - what model number Bilstein's are recommended...do you know? I have a '00 GM with p/h package..   To all - despite what I have read in this forum about the converter shudder supposidly being eradicated with the '98 models, it has reared its ugly head on my '00 model at about 27k. Does a fluid change take care of this (schedule is for 30k) and does it pose a long-term reliability issue?   Thanks
#983 of 3244 Gas MIleage After Tuneup by slusher Jun 30, 2001 (8:04 am)
I have a '97 GM with 106,000 miles on it (I do a lot of highway driving every week.... so probably 60K of this is highway miles.)   The car was running fine, but since it had over 100,000 miles on it, I figured it was time to replace the spark plugs a few weeks ago. At the same time, the place doing the new plugs noticed that one of my tires was almost gone. So, I ended up getting some new Firestone tires at the same time.   Since getting the work done, I'm now getting apx 4 miles per gallon less than I was getting before having the work done. I would normally expect mileage to get better, or at least stay the same.   Has anybody heard of this happening after having such work done. I thought about it being the tires, but they're not bad tires....steel belted with a 55,000 mile tread wear warranty. They were not the top of the line tires, with a 75K treadwear warranty, but I bought a step lower because, as I told them, with 106,000 miles I really didn't expect to still be driving this car for another 75K miles. Is it possible that something was done wrong with the new plugs or did I get lousy tires? I'm thinking about taking it back and mentioning this to the people who did the work, but I'll fear they'll just say it's the tires I bought and I should have bought their better set to get the best gas mileage. I've had two other sets of tires on this car, both comparable in specs to these new tires, but always got better gas mileage.   Right now I'm getting maybe 11-12 mpg city where I had been getting 15-17. On the highway it's apx 20-22 where I had been getting 25-26 before the work was done. Anyway, just wondering if anybody had any thoughts about such a drastic drop in gas mileage like this.   Thanks.
#984 of 3244 by johnbono Jun 30, 2001 (8:12 am)
Bilsteins will improve handling on a Crown Vic. The ones to get are the HD bilsteins. I believe they sell them at copcars.net. Though Bilstein says they don't work on HPP cars, I know a number of people who have installed them on HPPs and had no problem.
#985 of 3244 mileage by bruneau Jun 30, 2001 (11:50 am)
slusher, if you are using the same air pressure in the new tires, I doubt that they could make that much difference, Something wrong with the tune up. Bruneau
#986 of 3244 To mrf re: Bilstein shock part nos. - by harmar Jun 30, 2001 (12:50 pm)
Sorry for the delay; I had to locate the slip of paper I jotted these down on. I got these from Bilstein's Web site (it's a little tough to navigate, in case Bilstein's honchos read this!) and confirmed them at AutoZone. They fit '74 -'00 Grand Marquis, but I did NOT check to see if the same models fit Crown Vics.                  C (normal) ID (heavy duty)       Front B46 - 1497 B46 - 1495       Rear B46 - 1498 B46 - 1496   AutoZone's prices are ~$99 each.   Re: your AT problem. Before I bought my '00 Marquis, I looked at www.alldata.com for info on any Technical Service Bulletin (TSB) for it. Alldata used to provide the complete bulletin, or a summary, free. No longer. But it will give you a listing of TSB number, issue date, and title. Alldata listed only 11 TSBs on the Marquis through May 2000, but it seems likely there are more not yet entered into its database. Anyhow, TSB 99-14-12, July '99, titled "A/T-Green Service Tagged Transmissions, 4R70W" is the only one listed for an AT. You might want to ask your dealership about it, and others that may have been issued by FoMoCo, but are not on Alldata yet.   Good Luck!
#987 of 3244 Life begins at 140,000 by 427435 Jun 30, 2001 (8:37 pm)
smmsmm, I wouldn't automatically plan on changing/overhauling the engine/tranny at 140,000 miles unless they are displaying problems. With good maintenance, there's no reason they won't go 200,000. Change fluids---especially the transmission---and then just drive. If oil consumption is over 1500 miles per quart, the tranny shifts OK, and no funny noises, just keep driving and maintaining.   You'll probably have more problems with things like the A/C compressor (spendy), sensors, window actuators, wiper motors etc. then the drive train.   Good Luck.
#988 of 3244 Poor Gas Mileage After Tuneup by 427435 Jun 30, 2001 (8:50 pm)
slusher, did they just replace the plugs or did they also replace the plug wires? If the wires are the original ones, they could have easily developed problems (breaks in the carbon that conducts the current) when they were twisted and pulled to get them off and on the plugs. There have also been problems with the long plug connectors that go down through the aluminum head when they have aged---they allow the spark current to short to the head. This may not happen at idle but under load a little missfiring wouldn't be noticed except for the gas mileage.   If they weren't replaced, do so---the last set I bought (my son has a 4.6 in a T-bird) was about $90 at Ford. Could have saved a few bucks at one parts store and spent more at another but hoped that the Ford set would have the problems worked out by now.
#989 of 3244 Thanks 427435 by slusher Jun 30, 2001 (9:07 pm)
Thanks for the input 427435. I looked under the hood, and the wires are certainly not new looking, so they obviously are the old ones. I'll look into getting a new set of wires and see if that takes care of the gas mileage problem.   Thanks again.

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