Ok i keep gettin code 43 " fuel supply" ok, now after this 9th time of gettin this code i went ahead & got a real denso O2 senor... Well 600 miles later guess what? ........... Code 43 & this time i got an extra code, looks like code 1 & 6
I've replaced every single sensor on the car so im lost & about to set fire upon thee !!!!! Its a 91 integra with a b20z swap & theres no hacking or anything like that, it looks straight stock with no add ons besides the air filter, header, exhaust. Last nite I hooked up a volt meter & plug into the pinout on the ecu & it was reading the volts properly & this morning it was barely even doin anything
Man if yall have anythang, anythang at all PLEASE let me know
Thanks Cameron

 

Code 43 can be ether the O2 sensor or a fuel supply issue.

The way you tell the difference is if your car has driveability issues. If it is having them them it's fuel related not O2 related.

Now DTC 1 is O2 sensor circuit related and in conjunction with a code 43, I would say that you may have a wiring issue. Where you have swapped O2 sensors and still get the same error code. It is a possibility.

Code 6 is your Engine Coolant Temp sensor, could check to see if the connector is clean and tight. Other than that you need to trace the circuit using a multimeter.

Do you have a helms manual to follow trouble shooting for these issues?

I'm sorry that I don't have the time to write down all the steps to trouble shoot these issues. It's not always as easy as throwing parts at these errors. It could be hacked wiring, worn wiring or the ECU itself that are causing these continuous issues..... Troubleshooting and eliminating each component is the key to electrical issues.

 

grab an integra service manual and use the flowchart for diagnosing code 43.

 

No, i dont have a helms manual, i wish i did & Kyden when you say service manual would a chiltons be sufficient? Thanks for the info guys i really apperciate it. I'll get started tonite when i get home

 

Ether a Chiltons or Helms would be good. However, for these issues even a $15-20 Haynes manual would be better than nothing.

I'm not 100% but I'm pretty sure there are PDF files readily available for DL online for your chassis and engine both.

PM Sent!

 

Alright thank you, i'll keep posting as i find crap wrong with this car
Thanks again

 

So after last post, i was driving home from work & pulled into 7-11 & pulled the back up fuse to erase the codes. Got back in & started off again meanwhile messin with the voltmeter trying to get a readout of the o2 signal & still today no signal "this is probed at the back of ecu" which pretty much tells me bad ecu or bad o2 but the denso o2 is brand new remember? Also i failed to mention that i have a random bog taking off at a red light just for a sec. or two then clear up & drive fine, ive been dealing with this issue for a looong time & i thought "injectors"???? What are the chances??slim to none but i put my RC 270's as soon as i got home.......... Ive should of changed injectors on every car /truck i had !!! Runs soo much better!!! Did not have any bog issues on the way to work this morning "cross my fingers" but i'll have to wait till this weekend b4 i can deal with the o2 issue/ & get my chiltons from Oreilly auto. MiL is still off after 200 miles with no o2 signal?? Well as long as it stays that way!!