Car troubles (have check engine codes)

[jholbert]

*UPDATE* Car troubles (have check engine codes)

Lately I've had trouble with my 1999 Mustang GT misfiring. It seems as though one or two of the cylinders are not firing when the engine is under heavy load. I was hoping it was just the spark plugs, so I changed them out this morning, but unfortunately the car is still acting up.

Could anyone tell me what the following check engine codes mean?

P0356
P0305
P0355

UPDATE: I found the codes:

P0305* Fault Cylinder F-Misfire Detected (CYLINDER 5)
P0355* Ignition Coil E Primary/Sec Circuit Error
P0356* Ignition Coil F Primary/Sec Circuit Error

Can anyone make any sense of them? What should I do?

 

[RysRed96GT]

make sure ur plugs are torqued down correctly. check to see if the boots are being lifted up from air getting past them.

other guesses would be to clean ur MAF.

worse case might wanna pull the injectors for those cylinders and check for dirt, try some injector cleaner maybe in ur tank.

 

[jholbert]

Can you make any sense of theses codes that I'm getting?

P0305* Fault Cylinder F-Misfire Detected (CYLINDER 5)
P0355* Ignition Coil E Primary/Sec Circuit Error
P0356* Ignition Coil F Primary/Sec Circuit Error

Anyone?

 

[RysRed96GT]

only guess is check your coil packs for dirt. check connections. did you do anything before this happened?

 

[jholbert]

only guess is check your coil packs for dirt. check connections. did you do anything before this happened?

Ok, but I'm pretty sure they are clean. Maybe a couple are bad?

I did nothing to the car before this happened. It just started happening out of no where...

 

[jholbert]

*BUMP*

 

[jholbert]

Thanks for all the help guys...