I just went for inspection my car but its fail for these issue.Can anyone help me how can i fix those & how much cost its takes to fix it
So, lucky for you the misfires on cyl 2 & 6, are both bank 2, which is on radiator side of engine, easy to access plugs and coils.
Fix the misfires first. 2 cylinders misfiring may be because one is messed up, which causes fuel trims to bank 2 to be off, which causes the catalyst error.
I think you will need to get a compression check on bank 2, and change plugs. Swap coils to see if misfires follow the coil. DIY, diagnosis very cheap, at a shop, dunno, maybe 2 hours to diagnose, if they are competent on this type of (common) problem.
Fix the misfires first. 2 cylinders misfiring may be because one is messed up, which causes fuel trims to bank 2 to be off, which causes the catalyst error.
I think you will need to get a compression check on bank 2, and change plugs. Swap coils to see if misfires follow the coil. DIY, diagnosis very cheap, at a shop, dunno, maybe 2 hours to diagnose, if they are competent on this type of (common) problem.
Quote:
Fix the misfires first. 2 cylinders misfiring may be because one is messed up, which causes fuel trims to bank 2 to be off, which causes the catalyst error.
I think you will need to get a compression check on bank 2, and change plugs. Swap coils to see if misfires follow the coil. DIY, diagnosis very cheap, at a shop, dunno, maybe 2 hours to diagnose, if they are competent on this type of (common) problem.
definitely need a compression check if compression is blown then you can try to put a half a tablespoon of oil in the spark plug tube and try again. If it improves it’s the piston rings. If it doesn’t you could have a messed up valve. People have diagnosed messed up valves by blowing compresed air into the plug wells and felt for air blowing out the intake plenum.Originally Posted by Mesquite77
So, lucky for you the misfires on cyl 2 & 6, are both bank 2, which is on radiator side of engine, easy to access plugs and coils.Fix the misfires first. 2 cylinders misfiring may be because one is messed up, which causes fuel trims to bank 2 to be off, which causes the catalyst error.
I think you will need to get a compression check on bank 2, and change plugs. Swap coils to see if misfires follow the coil. DIY, diagnosis very cheap, at a shop, dunno, maybe 2 hours to diagnose, if they are competent on this type of (common) problem.
Either way if you’re lucky it’s just a coil pack or bad plug but it could be more. Multiple misfires isn’t the best sign but it is possible if you haven’t replaced coil packs or plugs that multiple will fail at once. fixing the misfit issue should get rid of the catalyst efficiency code. Then you’re going to have to deal with the coolant temp circuit issues
good luck