Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Both of these codes are related to pump injection timing. Were these codes setting before the injection pump was replaced? has the pump been timed and relearn performed?
that is where your problem is. Once the learn is completed on a warm engine it should be between -0.75 degrees or as close to it as possible. If you are out of the 0.0 to -1.0 range it will set this code. It does not take much movement to change the timing. 1mm of movement is the equivalent to almost 1 degree.
You are either not moving it far enough or in the wrong direction. There is a timing adjustment procedure and a timing learn procedure. When performing the adjustment procedure the offset degrees should be at 3.5 (actual timing). Once the adjustment is made, perform the timing learn procedure. This should result in a learned position of -0.25 to -0.75 degrees. The 2.46 you are getting is that actual timing or the learned parameter?
yes. actual needs to be 3.5. at 2.1 actual you need to rotate the pump towards the drivers side. once you have actual at 3.5, perform the learn again and it should be close to -0.75. If you keep moving to the drivers side with no change from 2.1 you either have a problem with the pump or the timing gears.
ok, let me know how it works for you.
it should have at least changed from 2.46 to -2.46 when moving from one extreme to the other. If it stays at 2.46, check for worn or miss timed timing gears or the pump itself is faulty.
The computer is original computer is not recognizing either the camshaft or crankshaft signal. You can verify the sensors are working properly by reading Hz on the signal wires from each of the 3 sensor signals. From what you have said though the ecm will fix it. If not let me know and I can provide you with the wire locations at the ecm and what they should read per engine rpm.