No Spark on 1 and 4. Changed Coil, still no spark. What could cause this?
2005 Buick LeSabre, runs rough, check engine light on. No spark for 1 and 4. Changed coil, still no spark.

The Buick LeSabre holds several notable distinctions. As Buick's entry level full-size sedan (just a notch below the Park Avenue), the LeSabre is both the number one selling car in its class in America for the last 12 years, but also the longest-lasting and only surviving name from a Buick sedan lineup that was introduced back in 1959. After 47 years on America's highways, the LeSabre bids farewell at the end of 2005.
As such, there are minor changes to the 2005 Buick LeSabre, consisting mainly of OnStar now being standard on all three of the LeSabre trims -- Custom, Limited, and Celebration Edition. The Celebration Edition is a holdover from 2003, and adds on to the luxury-oriented Limited with a heads-up display, mirrors with turn signals, standard 16-inch wheels, two-tone leather, and StabiliTrak. All LeSabres come with self-leveling rear suspension, ABS brakes, dual front airbags, power features, power driver's seat, and cruise control. The Limited adds traction control, side impact bags, leather seats, memory settings, and dual-zone climate control. A 205-hp, 3.8 DOHC V6 and 4-speed automatic provides for a smooth, yet powerful ride in both city and highway.
There are lots of nice options, such as a sunroof, rain-sensing wipers, and heated seats and mirrors, that drive the 2005 LeSabre up into luxury sedan prices. Standard seats are bench, to accommodate up to six people, but front bucket seats can be substituted. Owners say they are sad to see the LeSabre go, as it has provided them with a steady dependability over the years, smooth comfort, and easy handling. Gas mileage is commendable for a full-size, and the trunk space (18 cubic feet) is ample for lots of luggage. There are few complaints about the 2005 LeSabre, and these are mostly to do with what it lacks: no fold-down rear seats and no seatback pockets.
2005 Buick LeSabre, runs rough, check engine light on. No spark for 1 and 4. Changed coil, still no spark.
Well parts from a 2005 Buick LeSabre work with my 2004 Buick century front end is smashed radiator motor mounts Hood etc and front passenger headlight
I changed the water pump on my 2005 Buick le sabre, afterwards the oil was milky. I checked the oil before and it was not milky. What could have caused it.
Does back seat lay down for hauling?
I got the car back from the mechanic after they repaired the intake manifold and the fuel pump. Ever since, there is a tapping noise when you start the vehicle and it continues until the car reaches about 40mph or I lift my foot of the gas pedal. It is worse when it is cold outside. The car works fine otherwise, there has been no overheating, trouble driving it or check engine lights coming on. Not sure of what the problem is or how concerned I should be. This car has about 98000 miles.
Air Conditioning
Automatic climate control front air conditioning · Single front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Center console: front console with storage · Multi-function remote: keyless entry · Steering wheel: tilt-adjustable · Steering wheel mounted controls: audio
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: bench
Seats
Front seat type: split-bench · Heated: front seats · Upholstery: leather
Suspension
Air Suspension: rear · Leveling: self leveling suspension
Telematics
Satellite communications: OnStar
Tires and Rims
Wheels: steel
Windows
Front wipers: intermittent
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Center console: front console with storage · Dimming rearview mirror: auto-dimming · Memorized settings: driver seat · Multi-function remote: trunk release · Steering wheel: tilt-adjustable · Steering wheel mounted controls: audio
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: power
Rear Seats
Type: bench
Roof
Moonroof: power
Seats
Front seat type: split-bench · Upholstery: leather
Suspension
Air Suspension: rear · Leveling: self leveling suspension
Telematics
Satellite communications: OnStar
Tires and Rims
Wheel type: aluminum alloy · Wheels: chrome
Windows
Front wipers: rain sensing