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Buick Regal, Sedan
#3053 of 3508 Fog Lamps on '04 Buick Regal LS - Just Decoration?
Nov 23, 2005 (10:15 am)
I have a 2004 Buick Regal LS and because it's a Canadian model it has the automatic daytime running lamps. I'm wondering if the fog lamps are of any use at any time. I find using them at night they offer next to no difference and during the day, say if it's foggy, they are equally useless because the headlights come on automatically.
I have the factory bulbs, so I suppose that might be part of the problem, but will new bulbs really make that much difference?
#3054 of 3508 Crazy Buick Regal (97)
Nov 23, 2005 (10:15 am)
My 97 Buick Regal has started dieing at low speeds. I'll pull over to the side of the road, and then try to start it. Sometimes when I turn the key nothing happens. Radio still plays, lights don't go dim, just nothing. Then 10 seconds later it starts and is fine, but still running rough. I've also been replacing bulbs quite abit, so I thought maybe it was the alternator. I had an alternator put on a year ago, so maybe it's gone bad. I found somebody else on this site that had similar problems, and one poster replied that it was the alternator. Can anybody confirm?
#3055 of 3508 Re: Fog Lamps on '04 Buick Regal LS - Just Decoration? [erikrp]
Nov 23, 2005 (3:54 pm)
Fog lamps are not "just decoration", but their effect is rather limited. I would say they are something like 75% decoration, and 25% substance. Or even 90% decoration, 10% substance in case of Regal.
The light from fog lamps, sitting low above the road, does not reflect from fog (or snowfall, or rain) back to the driver's eyes as much as the light from headlights. It helps a bit in light fog and in rain, in the night time. Does not help in a dense fog or strong snowfall, inpenetrable by light.
Fog lights are most efficient with trucks and SUV, where the driver sits high, and headlights are sitting far from the ground. Less efficient with cars. The Regal's headlights are sitting rather low, just above its fog lights, so the difference in reflection is minimal.
There is no use for fog lamps when driving with the high beams. Too much "headlight" light is reflected back. Must switch to low beams when driving in night in fog, snowfall, or even in strong rain.
For the same reason, there is no much sense in strong fog lamps. When fog lamps may be useful, strong light would reflects back. Yellow fog lamps, may be, are more efficient.
Fog lamps are kind of status symbol, however. You can see many car, and especially trucks, driving with fog lamps on - even in a perfect weather. Just to show everybody that it is a more expensive vehicle. Or that its owner bought a set of aftermarket headlights, for as low as 35 to 50 bucks, and installed them.
#3056 of 3508 Re: Fog Lamps on '04 Buick Regal LS - Just Decoration? [yurakm]
Nov 23, 2005 (6:11 pm)
>Just to show everybody that it is a more expensive vehicle. Or that its owner bought a set of aftermarket headlights, for as low as 35 to 50 bucks, and installed them.
Or to blind oncoming drivers with the low-mounted lights shining up into their eyes. I thought road lights were to be used with high beams and have been perverted into the use with low beams in US to blind oncoming drivers and make the road less safe instead of being able to see better at high speed with high beams on.
#3057 of 3508 Service Engine Light
Nov 23, 2005 (7:20 pm)
The "service engine soon" light keeps coming on about a week after turning it off. The code is po420 (low efficiency). I have changed the catalytic converter and the front O2 sensor. Any other ideas what might be the cause.
#3058 of 3508 Service Engine Light
Nov 23, 2005 (7:37 pm)
Sorry - the message in #3057 is concerning a 2002 Buick Regal LS
#3059 of 3508 Re: Service Engine Light [riger]
Nov 25, 2005 (1:13 pm)
I've only had two experiences where the Service Engine Soon light came on. The first was when I didn't tighten down on the gas cap (discovered that by checking the owner's manual), and the second was in conjunction with a rough running engine which turned out to be dirty fuel injectors. Since then I've been adding a bottle of Chevron's Techron fuel injector cleaner at every oil change and haven't had the problem since. Please let us know how things turn out.
#3060 of 3508 ext temp sensor & service engine soon light
Nov 26, 2005 (9:25 pm)
hi...i am new to new forum. i have been driving a buiclk regal ls 2000 for close to 2 years. i have some questions here.
1. the ext temp sensor doesn't seem to work. for example, the temperature this morning was in the 40s, but the indicator panel showed 105 F at the start and reached 120 F within 15 minutes of driving on the highway. i have read that this could be due to a faulty sensor, and the best way would be to replace with a new one. Is it expensive to get a new one, or can i drive my car and ignore the temperature indication? there was once the ext temp sensor indicated a very high temperature, and the engine would not restart. i had to wait for a while before the engine could be started. i don't know if engine problem is related to the temp sensor.
2. the Service Engine Soon light came off recently and lasted for a couple of weeks. A few days ago, for some unknown reasons, the light went off. is this a common issue in buick regals? should i ignore it since the warning light has gone off?
thank you. hope to hear some feedback.
#3061 of 3508 Re: ext temp sensor & service engine soon light [soccerball]
Nov 27, 2005 (6:43 am)
The external temperature sensor only controls the climate control with its input; it doesn't affect the motor's sensors and inputs.
The external sensor is in front of the radiator probably on a center vertical support. It's about the size of your thumb. I would try disconnecting it and reconnecting it since there will be a connector somewhere close to it. If the digital control for the HVAC is not flashing when you start up, it's probably just a bad connection or bad sensor. Try GMpartsdirect.com and rockauto.com for the part (I can't find it on rockauto). Also check with Advance Auto and NAPA. I would expect it to be under $40 for a replacement.
The service engine soon light can be gas cap seal. Try a little vaseline on the rubber seal on the cap. Use an oiled cloth to rub the inside of the metal filler tube to remove any buildup. I've seen brown crud from gas or something building up where the contact with the cap is made. If it's not a flashing yellow light, then it's a low level pollution control problem.
If that is what's causing the light, the system retests the seal of the tank and other tubes to the charcoal canister only when started lukewarm. I would drive until the temp gauge just starts up to like 100. Stop car for a while (I got coffee) and then when you restart the car just sit at idle for a minute or two and the light may go off if the pressure test is passed. If the car is warmed above 170 it does not do the pressure test. These were the parameters used for my 98 LeSabre's system when I read the factory manual to learn how its yellow light worked!!!
Hope this helps.
#3062 of 3508 Re: ext temp sensor & service engine soon light [imidazol97]
Nov 27, 2005 (7:15 am)
I found a temperature sensor on gmpartsdirect at $4.40 or so with $9 shipping. You might check locally. There were two different part numbers listed. Check the number for the one you have when you check the connection. But it's possible there's an updated part...
It's cheaper than I expected...