Question about 2003 Pontiac Bonneville
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Posted on Jan 02, 2017
SOURCE: 1995 pontiac bonneville 3800 v6
P0321 Spark Reference Circuit. The spark reference signal is used by the PCM to improve ignition timing accuracy during crank and at engine speeds of up to 1,200 RPM. The spark reference circuit allows the use of ignition control mode below 400 RPM, eliminating the need to utilize module mode during start-up, and also allows the PCM to calculate true crankshaft position in 1/6 the time that use of the fuel control reference signal would permit.
During normal operation, the PCM uses the spark reference signal to control ignition timing until the engine speed exceeds 1200 RPM, at which time the fuel control reference signal is used. There is no connection to the TCS.
If everything checks ok then the PCM is defective PCM.
Posted on Aug 28, 2008
SOURCE: 1995 pontiac bonneville stalls
I just went through lots of troubleshooting and expense on my 1996. Whenever I would lift my foot off the accelerator and was below about 30 mph, the rpm's would starts jumping around and sometimes it would stall. If I gave it a little gas (accelerator), I could sometimes keep it running. It also backfired once in a while. Starts right back up. Also, if I let it idle while in part, it would die after 1-2 minutes.
I ended up finding a hole in the fuel regulator. About a ~$70 part if you get an AC Delco, but very simple to change.
Posted on Dec 24, 2008
I have a 2000 Bonneville - I had a problem with the car stalling out - then it did not want to start back up. (When it did it would idle up and down and then die) I changed out the mass air flow sensor - now I have not had a problem. Good luck with it.
Posted on Mar 17, 2010
i have a 94 pontiac bonneville that stalls while driving. It seems to die always when I drive the car for more than 20 minutes. (During traffic) It recently has had a tune up (oil, oil filter, plug, wires) Replace module and fuel filter as well. I have had two different mechanics look at my car and no codes showed up for them. They mentioned fuel pump and crank sensor, which they CAN'T guarantee this will fix the problem. I've done some research online and have read that people with same problem have replaced both and this did not fix the problem. Any other suggestions??????
Posted on Mar 21, 2010
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