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My trialblazer 4.2 six misfires and stalls imediatly after starting codes p1345 and p0300 come up scanner. i have looked at the coils but see no visual problems also looked at spark plugs they are carbon covered.
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? 23:39 www.youtube.com/watch?v=G_grIaTgdRI Oct 26, 2013 - Uploaded by Robert DIY
For the new play by play misfire video click here: ... Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, ...
Po300 is a multiple random misfire there several things that cause this GM had an issue with the coil wire arcing to the transmission dipstick tube the new routing is to go over the plugs and remain on the inside of tube (old way was behind) USE a new wire. #2 dirty fuel (water contamination) As for the p1345 code this could be caused by ignition arcing inside Distributor Cap I would suggest replacing cap and rotor Clear codes This code will set once engine has gone over 1000 rpm's it updates every time to get spark advance correct if sets again distributor has moved this can be reset with a gm specific software scanner under camshaft offset specs 0 degrees to +4 max.
The P1345 means SGC (Cam Position) sensor circuit malfunction/crankshaft position-camshaft position correlation P0300 means random/multiple cylinder misfire detected
Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.
A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
Symptoms may include: * the engine may be harder to start * the engine may stumble / stumble, and/or hesitate * other symptoms may also be present
Causes: A code P0300 may mean that one or more of the following has happened: * Faulty spark plugs or wires * Faulty coil (pack) * Faulty oxygen sensor(s) * Faulty fuel injector(s) * Burned exhaust valve * Faulty catalytic converter(s) * Stuck/blocked EGR valve / passages * Faulty camshaft position sensor * Defective computer
Possible Solutions: - If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. - If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
0300 is a mis fire. Explains the fried wire. Were all the plugs changed?? If not, definately change the one on the fried wire. Possible burnt cylinder. Does it fire/start right away cold?? If not, it could be the coil. Start by checking spark in all your wires and plugs. This will isolate your issue hopefully.
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