Can't figure out misfire.
06-09-2017, 11:33 AM
#1
Intermediate
Thread Starter
Can't figure out misfire.
Ok, so I started getting misfire codes. Random. Cyclinder 1, cylinder 6 just all over the place. So I changed all 6 plugs and all six coils. Was good for a bit. 400km. Now it's misfire again random and all six cylinders. Now when it happens. The car is definitely shaking and lacking power. I can pull over reset the engine light. Not even popping the hood and the car will be ok for 20 30 km again. I'm thinking maybe ecu but people on here much more educated then me. Any help would be grate let appreciated
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justnspace (06-09-2017)
06-09-2017, 11:41 AM
#4
can you check the ECU to see if there is any evidence of water?
a/c drain tube can get clogged which then sends excess water inside...and drips all over ECU.
the ECU is located in the front passenger foot well. it'll be on the left underneath the carpet towards the center stack
a/c drain tube can get clogged which then sends excess water inside...and drips all over ECU.
the ECU is located in the front passenger foot well. it'll be on the left underneath the carpet towards the center stack
06-09-2017, 11:47 AM
#5
Intermediate
Thread Starter
Have not checked that I will for sure tonight though. Also one day randomally had a code I believe it was p1298. Electric load detector "high output". Cleared it and have never seen it again. Couple weeks or so now
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06-10-2017, 06:48 AM
#10
Multiple cylinder misfire is a problem that applies to all cylinders, e.g. fuel mixture, not usually plugs/coils.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.
06-10-2017, 07:30 AM
#11
Intermediate
Thread Starter
06-10-2017, 07:32 AM
#12
Intermediate
Thread Starter
So so I did just find a crack in the air duct work between the air filter and throttle body, I'm going to try to see if I can get a new duct piece. Thanks for the advice and still yet to check the ecu for water damage
Multiple cylinder misfire is a problem that applies to all cylinders, e.g. fuel mixture, not usually plugs/coils.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.
06-10-2017, 09:34 AM
#13
Race Director
Meh, don't think the cracked duct is your issue, but you should still get it fixed.
06-10-2017, 05:37 PM
#14
Maybe inspect all electrical pieces, lines, and connectors at the coils and between there and the ecu. Sounds electrical in nature. Lots of the obvious stuff has been mentioned but all are good ideas and worth double checking at this point.
06-13-2017, 10:52 AM
#15
Intermediate
Thread Starter
If I were to swap out the ecu for a new used one. Is it just plug and play? Or so I have to go get a flash or something fancy?
06-13-2017, 12:45 PM
#16
Intermediate
Thread Starter
Is there a way I can check the egr system? I have had it cleaned but wouldn't mind checking for piece of mind
Multiple cylinder misfire is a problem that applies to all cylinders, e.g. fuel mixture, not usually plugs/coils.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.
EGR system a good place to start, but check for a vacuum leak, also check air intake duct work as some crack over time and then there's always fuel pressure.
Post about checking the ECU can't be overlooked.