CEL Codes

[combatmedic]

I finally got my codes read and it came up with 4. P0301 Cylinder 1 Misfire. P0300 Random Multiple Misfire. P1400 EGR and P0443 Evap. I was expecting to get the last two because I have my EGR blocked off and my EVAP system is off. The cylinder 1 misfire I believe is because my plug wire has a cut in it but I am confused about the second one, the random misfire. Is it my other wires or plugs?? I was told it could also be a leak around the intake manifold??

 

[gstbobby]

My car had this problem and yes it can be a leak around the intake manifold but first I would say make sure the plug wires are plugged into the coil pack right first because they can come slightly unplugged and cause a misfire, if that does not fix it I would replace the spark plugs and see if that solves the problem, if it does not then it is most likely the intake manifold gasket or it could possibly be the coil or plug wires.

You might want to might sure your ignition control module is plugged in all the way as well, mine was not and was throwing the code as well as it eventually would not not idle, the ICM is right in front of the fuel rail, you cant miss it, it is the big plug with alot of wires coming out of it.

 

[gofer]

Its easy to see if that spark plug wire is causing the cylinder 1 misfire0301 by MOVING the wire to another cylinder, if the fault CEL moves then its the plug wire.

Your random multiple misfire0300 is from your 6-bolt swap 1g CAS. Check the wiring going to the CAS coming from the CPS and CAS harness, heres what it should look like.

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If the wiring is good try to secure it (zip ties) and put some insulator on it to keep it from picking up interference. 2G ECU's were designed to detect misfires from a sensor reading directly from the crank, the CPS. A simulated crank signal from the CAS may not be accurate enough for some 2g ECU's. You might also try replacing your 1g CAS and see if you can get the P0300 CEL to disappear that way too.

 

[combatmedic]

yeah I have the harness set up like that but I will try to insulate the wires and see what happenes. Thanks guys,