Bonneville trouble, what should I be looking at?

Question

1992 Pontiac Bonneville SE (3.8-liter V6 FWD-AT 203,617miles)
Started out a while ago with knocking under heavy acc.Noticed after sometime that upon cranking over the ign. was an obvious clicking from stereo speakers (even if radio were turned off). Headlights dim once in a while in both idle and drive. The spkrs would click by hitting the window switch.
The high end of the problem came when I tried to start the car and wouldn’t turn over, after multi tries it was suggested that it may be the batt. I received a jump and it did the trick. After this it would turn over but start got harder. Sometimes it would start great other times it would knock and ping loudly and not start. The knock on acceleration between (2000-3000rpm) got worse and would actually become under-powered (slow down as if braking while supposed to acc.) when the knock set in. It even cut off on me once when rolling out from a stop. Now it won’t start at all. What should I be looking at? need more info?

Answer 1

On the rear of the engine is a knock sensor that senses when your engine begins to detonoate.
The sound you hear that sounds like marbles rattling around in your engine is from what's called detonation. Basicaly, when the piston is coming up on the compression stroke the timing is advanced to before top dead center.
The knock sensor tells the computer that the timing is advancing too far, and the computer reduces the amount of timing advance to eliminate detonation.
I figure your "knock" sensor is bad and not telling your computer to retard the timing.
Try premium gas first. It contains a higher octane concentration of chemicals to control detonation.

Answer 2

I comprehend this thread is extremely old,,,yet likely this can be of a few help for destiny human beings searching for solutions for a 2001 PontiAc Bonneville with a 3800 sequence II motor....a topic with the motor that looks flooding or getting too a lot gas is maximum in all chance the THROTTLE Positioning Sensor...If this does no longer fix the flooding difficulty the position you could genuinely smell raw gas even as operating, smoking, idling demanding, then i'd ought to assert discuss with the gas pressure Regulator... 2001 PONTIAC BONNEVILLE, with 3.8 II (3800 sequence 2 ) motor Flooding difficulty is ninety 9.5% certain to be THROTTLE position SENSOR MALFUNCTION. good success.

Answer 3

the most likely cause on that car would be the ignition coil. they are a very common problem for this car and they can cause all of problems that you described. i would recommend replacing spark plugs and ignition wires along with the coil.

Answer 4

2 thoughts
1. o2 sensor
2. fuel injectors dirty or bad