code 43 drama

[whitejdmcb7]

ok so i changed my fpr fuel filter and o2 sensor and the code still persits it is kinda intermintent like highway when im at like 3000 rpms or in 4th crusing at low rpms or when i hit about 4500 in 3rd any body have any insight

[ikayto]

have a spare ecu around?

[whitejdmcb7]

yeah i do ill try that out then

[whitejdmcb7]

nope still throws the code im wondering if its the fuel pump

[i<3mycb7coupe]

when you go by the diagnostic tree, its either the o2 or cpu, this is weird

[whitejdmcb7]

already replaced the o2 fpr and fuel filter and tried a different ecu yeah it is so irritating lol but if its a fuel pump it would probably cut off and shit right???

[whitejdmcb7]

any ideas??

[Youngill726]

i was throwing same code i was told it might be the fuel filter o2 sensor or fuel pump or clogged injector/ well i changed fuel filter and it still did it i know my o2 sensor was good but it was my fuel pump so i went head and put a walbro 255 in and no problem since.

[Slice One]

pull your injectors and see if they are clogged at the tip, if so clean up with some carb cleaner, let um sit to dry and put um back in, if thats not the cause its a still a good preventitive maintence.

[whitejdmcb7]

yeah pretty much all i did needed to be done anyways lol so fuel pump it is dammit

[Accordolictx]

Check your vacuum lines as well. After I completed my H22 swap I started to throw this code and I noticed one of my vacuum lines was pinching. Make sure the lines and vacuum supply is good. Best bet if everything else is a go.

[0to60n2weex]

Heres a diagnostic tree for that code!

[whitejdmcb7]

ya ive done everything on that but check voltage on the ecu itself ill try that next thanks ill have to save that

[0to60n2weex]

yeah no prob man.ive almost got every DTC saved in my photobucket. once i do i'll post them all up and see if Deev can make it a sticky or something.

[Slice One]

what kinda o2 sensor you got? you can test the voltage easy on the ecu by take the backing plate off the back and the soder points are in corrospondence with the mysterious "test harness" no one can get ahold of. This lets you test the voltage with te ecu still hooked up.