I had my car dynoed and these codes came up

PO 300

P1441

P1870

any help would be appriciated

thanks
charlie
usmc

 

P0300 Engine misfire detected -normally a random misfire. May or may not return after the code is cleared.

P1441 Evaporative Emissions (EVAP) system flow during non-purge - means the computer sensed that there was vacuum flow to the evaporative emissions canister when there was not supposed to be. May mean the EVAP solenoid is not functioning correctly or that hoses are damaged or misrouted.

P1870 Transmission Component Slipping - tranny slippage detected. Sometimes a random thing. Clear code and see if it returns.

 

Thank you for the full discriptiion, I was thinking of getting new plugs and wires, what do you recommend for me to get? Are NGK with Talyor 8.5 wires be good? The guy also said my tranny mount is broken I fixed that before so I got that! how would I fix the EVAP problem? check all my hoses?