My 98 Trans Am Started heisatating/ bogging at 20 to 40mph range. This doesn't happen all the time! I got 3 Codes: P0102- Just need to Clean the MAF/ P0153- Just need to replace the Oxygen Sensors/ But P0300 reads that "The PCM has determined that multiple random misfires have occured." What can be causing this: Can it be the Spark Plug and Wires/// or could it be a single COIL or COILS? Thanks for any Help!

 

Do you have logging equipment? If so log for missfires to try and isolate cylinders.

 

Thanks for the Info!

 

No I don't have logging equipment. Took it to a mechanic yesterday where they did a Diagnostic Test and found out that all cylinders weren't firing correct especially cylinder #2 and #8. He told me to replace my NGK's TR55 and factory sized wires-Oreilly brand with AC Delco spark plugs and wires. He also told me to clean the MAF sensor as will. Asked him if it could be the single coils and he told me he highly doubts it. My problems started as soon as the SES light turn on. It's weird the bogging doesn't happen all the time, just once in a while. Thanks for the Info!