[haiytro]

car runs at idle and acceleration fine no bucking or anything all new ignition except for the crankshaft position sensor but the mil comes on and flashes when steady at highway speeds taking my foot off the gas pedal makes it stop and so does accelerating please help im dumbfounded and dont really want to do the cps unless its nessary

 

[jonathane]

P1399 Honda Random Cylinder Misfire Detected OBDII Engine Light Trouble Code | Engine-Codes.com

 

[haiytro]

hey actually found this one out accidentally created another account but it turns out it was a weak egr valve spring so around 2000-2500 rpm it would open and cause a misfire