Question about 1998 Pontiac Bonneville
When driving sometimes the car won't accelerate if feels like it has no power take long time to get up to speed is this from the code p0336.. If so how do I fix it or check it...thanks for answering
CPS on a modern vehicle is the main input to the engine management computer to determine spark advance. If the CPS is toast then the EMC is not getting a good input to adjust timing.
Posted on Apr 13, 2014
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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: Getting the following codes from a 1997 Pontiac Grand Am....... PO121 TPS / Pedal Position Sensor A CKT Range / Perf Also, PO341 Camshaft Position Sensor A - Bank 1 CKT Range/Perf. Any thoughts on the
po121 means that there is a problem with the throttle position sensor ( tps). or in the wiring or connector, most likely its the tps that is bad. first remove connection from tps, heres how to test. use an ohms meter and hook a lead to top or bottom terminal of tps. use other probe on center terminal of tps. move throttle plate slowly, if the needle on meter does not move at a smooth pace, then tps is bad. good-luck!!
Posted on Oct 07, 2010
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