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#2469 of 2506 Additives to fuel stystem by onelord Jun 30, 2008 (8:28 pm)
I have a 03 deville with 66000 miles on it. Im getting 21mpg on the highway and 19 in the city. I was wondering if I should add something to the fuel in hopes of cleaning the fuel injectors. Is this wise to do? Replies to this message: bremertong (Jun 30, 2008 10:19 pm) bolivar (Jul 01, 2008 11:10 pm)
#2470 of 2506 Re: Additives to fuel stystem [onelord] by bremertong Jun 30, 2008 (10:19 pm)
Replying to: onelord (Jun 30, 2008 8:28 pm) I owned a 1998 Deville and later a 2004 Deville for three years each and always used STP fuel injector cleaner fluid with each fill up. never had any problems. The 98 got about 27 MPG highway and around 20 in town. The 2004 around 29 MPG highway and 21 city. You may have other issues and may want to try a complete fuel system cleaner (STP has one as do other additive companies). Have you checked your air filter or replaced recently. Your MPG stats sound low so you may want to investigate further if my two suggestions don't improve your MPG performance. The 98 Deville had 39,000 miles on it at time of trade and the 2004 Deville had 36,000 miles on it. Both much lower mile cars than yours but still think you should be getting better results.
#2471 of 2506 Re: Additives to fuel stystem [onelord] by bolivar Jul 01, 2008 (11:10 pm)
Replying to: onelord (Jun 30, 2008 8:28 pm) Unless you have been using very cheap unbranded gasoline, I wouldn't think you have injector problems.   With that milage, i woujld be thinking about plug wires and plugs. Us only GM wires and the recommended plugs. The wires and plugs should be good up to 100,000, but expecially if you have had some mechanical work done near the wires, they could be messed up. If you live in extremely hot area, the wires might also have broked down early.
#2472 of 2506 by onelord Jul 02, 2008 (6:02 am)
I was thinking of using a good brand of injector cleaner. I dont think its the plugss the car runs smooth and has great getup. I think it just needs some injector cleaner. Thanks for the info from both of you. Any info will help all of us. Replies to this message: bremertong (Jul 02, 2008 8:52 pm)
#2473 of 2506 Re: [onelord] by bremertong Jul 02, 2008 (8:52 pm)
Replying to: onelord (Jul 02, 2008 6:02 am) Hope you ill let us know how the injector fluid works and if you would share the name of the specific brand you used. Hope it will give you the results you are hoping for. Best wishes.
#2475 of 2506 Re: Blower motor problems [millstream] by gmarshall1 Aug 28, 2008 (1:43 pm)
Replying to: millstream (Jan 25, 2007 3:26 pm) Hi, I have the same blower motor problem could you tell me if you resolved yours and how. Thanks, John Replies to this message: bolivar (Aug 28, 2008 7:26 pm)
#2476 of 2506 Re: Blower motor problems [gmarshall1] by bolivar Aug 28, 2008 (7:26 pm)
Replying to: gmarshall1 (Aug 28, 2008 1:43 pm) Hummmmm, Not want to be mean, but are you aware you responded to a message 1 year and 7 months old?
#2477 of 2506 1975 cadillac deville transmission problem by bob3012 Sep 23, 2008 (7:05 pm)
I have not had any slipping or noise or problems with my transmission until today. While driving on the highway I lost it suddenly. It will only go into first gear. Will not reverse either. Any ideas? Bob
#2478 of 2506 Add Bluetooth to a 1992 Deville? by jeffwilson Oct 17, 2008 (10:49 am)
I am buying a used 1992 Sedan Deville w/46k miles. I want to replace the stock stereo with one that has Bluetooth and an iPod interface. Has anyone here done something like that? Can you suggest a model that would fir the car and if a new wiring harness is needed? Thanks very much in advance.

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