2000 Accent P1128

Hi, My Accent has a p1128 error code. I have replaced the MAf sensor and it still come back. The car seems to be pinging all the time now. Last night on the way home the check engine light flashed. When I checked the codes with my reader it gave P1128 , P0301,P0302 & P0303.
This told me it was misfiring on 3 cylinders! So I reset the codes again with my reader. This morning the car would not start so I check the codes again there where none! I then reset the car again and it started to run again althought not well. I then drove around for a while and it smoothed out but is still pinging. So far the light is off for the moment!

Since I have already replaced the MAF does anyone have some suggestions what to check next? What about the purge solenoid? OR both oxygen sensors?

Thank you,

Ian

I've had intemittant trouble with misfiring and found it happened more when it was damp out. Every once in a while it would start up and misfire and I could hear it wasn't hitting on all cylinders and the engine light would start flashing. I replaced the wires. $40. Haven't had the problem since. If your car has more than 30K you want to change the plugs with NGKs and get new wires. Now the code could be something totally different. I never had mine read. I suspected the wiring with the moisture issue and my mechanic suggested new wires. The plugs I change every 30K. I'd suggest wires at 60K. That is my experience but may not be the same thing you are experiencing. The spark ping I had in an Olds and higher octane gas took care of that but that goes back a long ways to the 80s and my knowledge of cars is not very extensive as I've only owned a couple as I live in the city and then there is the higehr price of higher octane or any other gas which I'm sure we all agree sucks. Hope that helps. :smokin:


Hi, My Accent has a p1128 error code. I have replaced the MAf sensor and it still come back. The car seems to be pinging all the time now. Last night on the way home the check engine light flashed. When I checked the codes with my reader it gave P1128 , P0301,P0302 & P0303.
This told me it was misfiring on 3 cylinders! So I reset the codes again with my reader. This morning the car would not start so I check the codes again there where none! I then reset the car again and it started to run again althought not well. I then drove around for a while and it smoothed out but is still pinging. So far the light is off for the moment!

Since I have already replaced the MAF does anyone have some suggestions what to check next? What about the purge solenoid? OR both oxygen sensors?

Thank you,

Ian

Thanks for the info , I ordered some leads today. The car has 88k miles on it so I cant complain. Its probably due some new leads and plugs. The only other problem I have had was a bad wheel bearing which was not too bad to replace. :)

Ian




I've had intemittant trouble with misfiring and found it happened more when it was damp out. Every once in a while it would start up and misfire and I could hear it wasn't hitting on all cylinders and the engine light would start flashing. I replaced the wires. $40. Haven't had the problem since. If your car has more than 30K you want to change the plugs with NGKs and get new wires. Now the code could be something totally different. I never had mine read. I suspected the wiring with the moisture issue and my mechanic suggested new wires. The plugs I change every 30K. I'd suggest wires at 60K. That is my experience but may not be the same thing you are experiencing. The spark ping I had in an Olds and higher octane gas took care of that but that goes back a long ways to the 80s and my knowledge of cars is not very extensive as I've only owned a couple as I live in the city and then there is the higehr price of higher octane or any other gas which I'm sure we all agree sucks. Hope that helps. :smokin:

Thanks for the info , I ordered some leads today. The car has 88k miles on it so I cant complain. Its probably due some new leads and plugs. The only other problem I have had was a bad wheel bearing which was not too bad to replace. :)

Ian

Sounds about due. Hope all works out well. :smokin: