Hey guys I got these codes on my actron reader. The 1690 saysfuel inj pump ckt sen does not agree with ECM CKP, the p0336 is a crankshaft position sensor. I have changed the crank sensor several times. My rpm gauge goes haywire ,up and down, the engine has what seems to be a mis in it now but not steady, engine lopes, sometimes it will not start for hours or if I take the hot cable off.Can anyone tell me what to check on the 1690 code? I sure would appreciate any advice you guys can give. This is for my 2000 dodge 2500 5.9 cummins