I have a 97 "88" olds that is misfiring #3. Changed all Spark plugs, wires and coils. Runs real rough and exhaust smells. Two mechanics cannot figure it out. Put on diagnostic, because check engine l

SOURCE: I have a 1999 oldsmobile

fuel pressure regulator on the fuel rail is probably it or the egr valve is stuck open allowing burnt fuel to flood the intake, im leaning towards the fuel pressure regulator because the o2sensor is probably reading rich or if its reading lean then i would choose the egr valve . good luck

SOURCE: My 2001 Olds Alero 2.4 liter engine misfires while

did they change the plug wires: sounds like when it get hot the wires are breaking down.

SOURCE: Spark? cylinder head? stuck valve? cylinder wall porosity?

That cap was most likley broken upon pulling off. You need new wires.

SOURCE: i have a 2000 alero that idles rough and smells like old gas

I, too, have a 2000 Alero 2.4L and am having the same problem, but worse. Whenever I brake to a stop while in Drive, the engine stalls sometimes. I thought it was the torque converter going bad. I tried the cheap fixes first when fuel system cleaner and air filter. I took it to a parts store and they pulled the code. "Service Engine Soon" light came on. "Too Rich Bank 1" was on the screen of their code machine. I was thinking fuel filter on my way to the parts store, but wouldn't a clogged fuel filter make it too lean? I have cleaned my air filter and have ran two tank fulls with "Sea Foam" additive. I have had some better low-idle performance, but it hasn't cured the problem. Today I held the throttle down at 1,500 RPM in Park to see if it was running steady, and the engine began to stall! I had to let off the throttle so that it wouldn't stall. That's when the "Service Engine Soon" light came on. About a year ago, I had the fuel injectors professionally cleaned at a shop. Is the throttle actually electro-mechanical? Is there a throttle relay or servo that's going bad?

SOURCE: 2000 OLDS BRAVADA FIRING ORDER DIAGRAM

For the Oldsmobile Bravada 4.3L V6:

Firing Order:
1-6-5-4-3-2

Cylinders:
......(back)......
|..6..|.......|..5..|
|..4..|.......|..3..|
|..2..|.......|..1..|
......(front)

Distributor Connections:
...........(back)
Coil-> o
6-----> o.......o <-----5
4-----> o.......o <-----1
2-----> o.......o <-----3
...........(front)

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