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
Man if yall have anythang, anythang at all PLEASE let me know
Thanks Cameron

 

Have you checked the fuel filter? or fuel pump and injectors? If the issue is fuel related, then that is the are that you should check first.

 

Yes, i have as a matter of fact, fuel filter is couple months old (it was still having same issue after replacing it) also put in a walbro 255 christmas eve nite -still does same thing. I have some 270 RC's that im going to put in on Sat after work, we'll see what happens. Its got a random bog right at take off & if you hang out for a while in 2nd & 3rd gear

 

do you have an modified ecu to help with those injectors? you can just drop them in there and call it a day, i hope you know.

 

Maybe your fpr isn't holding pressure. Just a thought since you said you changed everything else.

 

did you post this on g2ic? if so, i replied there.
also if so, you hadn't mentioned that you were running a b20. first thing you'd want to do is get an aftermarket adjustable fuel pressure regulator and bump that up to 50psi. most people running a b20 in their da with the stock pr4 ecm report this as being the fix for their intermittent stutter and code 43

 

just noticed you said you have a code 6. engine coolant temp. that'll cause your o2 and 43 codes right there.
measure resistance of ECT sensor first cold, then hot. cold, you should see about 7-10Kohms. hot, the number will drop drastically. probably to around 10ohms. the exact numbers aren't important. if it's bad, you'll know. the numbers will be way off. either low when cold, or high when hot.
check the sensor and wiring. that's probably your problem there

 

Thank you guys for all your help i will order & replace the fpr asap also i put those RC's in last nite along with a pretty resistor box delete plug & Immediately noticed im on the right track, sorry i failed to mention its a b20z im running, i still have no reading out the back of the pr4 on the o2 & now i have a 3-1/2 day weekend to check the ect ohms like mentioned above, you guys info is helping Tremendously!!! Thank you btw... Fuel pressure is steady 35psi fpr is ordered

 

you want higher than 35psi for a b20 running the pr4 ecm. closer to 50. but i'm almost certain your problem lies with the ect sensor. how were you testing the o2 sensor? a bad ect can also cause an o2 code

 

I probed into the back of the ecu-C16 pinout & we get nothing at all, i also checked the wiring all looks well even tho i had to splice & lenghten the o2 wire cuz of the header but i finally got to check the ECT last nite according to this link http://www.12v.org/maintenance/repairs/ect.php
Cold is 2.5ohms-Hot was in fluctuating between 295-348 so not sure if this means its bad, i'm really not keen on eletrical crap. I now have almost 300 miles & still no CEL after i reset it the other nite

 

if you were ranged correctly when testing, then that ect sensor is bad. try testing the o2 right at the sensor. see what you read then

 

I'll do that tomorrow & see what readings I
get, i hope i was on the right setting with the voltmeter it would only read on 2 of the 15 positions, i just kept turning the dial till i got a readout, also el crapitan i noticed in another thread a guy was asking about a ls tranny with his b20b swap if it would work but i wanna know if i should put a y1 tranny in mine since mine is the b20z2

 

the y1? i would, absolutely. so much funner than the ys1 you probably have now. like i told him, it's like night and day. you won't regret it. look into having the 5th gear set swapped from a ys1 though. the y1 1-4 are great for the city, but you'll want that tall 5th for the highways. if your trans is thrashed, pull the 5th gear set out of it and install to the y1. if it's still good, sell the ys1 and find a bagged ys1 to pull the 5th gear set out of. 5th is always in good shape

 

Alright, I gotcha, thanks alot