1992 Cadillac Deville V8 Front Wheel Drive Automatic 163000 miles
My 92 Cadillac Deville usually runs great, starts always. I have been having some trouble with it quitting while I'm driving. It just shuts down. It doesn't sound like a sputtering dying engine (like a lawn mower dying when it's out of gas), it's quiet and just suddenly shuts off, and then I can start it right back up. A couple of years ago my fuel pump went out (that sounded like a lawn mower dying) while the car was in park-idling. I had the fuel pump and filter replaced by a very good mechanic (this was October 2005, odometer 114099). I never had any symptoms prior to the fuel pump going out so I don't exactly know if these current symptoms might be a sign of a repeat issue with the fuel pump or maybe something new. I don't know how long a fuel pump should last. The OBD gives no codes. I have spent several hours on this site trying to do some investigating. I have read many other entries about the 92 cadi dying for no apparent reason. I am not sure if it is related, but the car is making a strange noise that I describe as a howling or hooting. It ranges from a quiet high hum to a howl or hoot like a loud owl. Also, I have noticed that the sounds pitch increases when coming to a stop and will follow the rythym of the blinker (woo ooh woo ooh woo ooh.) While idling at a stop and then return to a more steady hum once my foot leaves the brake pedal and the blinker disengages. I should also mention that this noise has become more common, as it was previously only audible when the tank was around a quarter full and would subside upon filling the tank. Now it makes the noise regardless of the tank being full or empty. Does it seem funny that noise would follow along to the beat of the blinker? Also, the sound (when standing outside of the car) seems to be coming from under the rear driver's side door, but can be heard inside or out. The problem with engine quitting seems to be more common on extremely hot (around 100 degrees) days. I am in a new town-state and I do not know any mechanics here (only some handy family members who may be able to help if we can troubleshoot the problem). I would like to know a little about what I'm up against before I take it in, just to cover my rear. I have a repair manual. My brother checked the pressure in the fuel lines and said the pressure was good. Can the pressure be good even if the fuel pump is going out? We have tossed around the idea of the ICM causing the quitting problem, but it doesn't seem to explain the sound. No codes on the OBD is not helping. Would there be a code if the pump was going out? It has quit while cruising along, cornering, banking, as well as when pulling to a stop.
One very hot day,
1. It idled about a half hour (with A/C on)
2. Then I drove about ten minutes,
3. Shut it off for about 2 minute,
4. Started it back up,
5. Drove for about 5 minutes at speeds no greater than 40mph
7. Would run for about 5 minutes and quit
8. Repeated this several times until I made it to the hwy (turned off the A/C) and once driving steadily 65 mph made it home 100 miles away with no more trouble. Strange.
I would really appreciate some help and ideas on this.
Thanks a lot. Cyndi
Tuesday, July 14th, 2009 AT 7:00 PM