1996 Grand Am Codes P0300, P0108 And P0335

1996 Pontiac Grand Am low coolant level light codes... P0108, P0300, P0335. I Replaced TIMING BELT REPLACED AND WATER PUMP AND SPARK PLUGS.

MY CAR STARTS RIGHT UP BUT WHEN I STEP ON THE GAS IT ALMOST DIES UNTIL I TAKE MY FOOT OFF. IT IDLES FINE THE COOLANT LEVEL LITE IS ON BUT COOLANT IS FINE. OH AND WHEN IT IDLES THE ENGINE HAS A SMALL JERK EVERY NOW AND THEN. WHAT CAN I DO TO FIX IT?

ANSWER:

P0108 is a MAP sensor circuit problem.
P0335 is a crankshaft position sensor circuit problem.
P0300 is misfires.

If all these codes came up after the timing chain was replaced, i would have to say that the timing is off a tooth or two. That would explain the MAP sensor code because the valve timing is off, thus affecting engine vacuum. The crank position sensor would also be affected, as well as causing misfires.

Question:
The car intermittently misses under normal driving conditions every once in a while. Changing the spark plugs makes it go away but a day or so later it comes back. Pontiac Grand Am 2.4 L. GM Computer codes = none. Changed spark plugs.

Answer:
If changing the plugs helps, i would look closely at the plugs that were removed. Make sure they all seem the same color. If one is oil fouled, or looks a little greenish or orange (depending on which coolant is in the system at this time) this would indicate an internal engine problem. If one is totally black, this would indicate a rich fuel condition which may be caused by a faulty injector or is more than one is black, then i would suspect a leaking fuel pressure regulator.

The low coolant light is just a stuck sensor in the bottom of the coolant surge tank.