SpoolnByYou

sup guys,
yesterday i took my p75 (ls) ecu out of my turbo car and put in my p05 (cx) ecu. i switched ecus b/c i was getting a tune and my ls ecu had uberdata and my cx ecu has hondata. with my p75,i would throw code 41.....oxygen sensor. this morning i throw a check engine light and go to pull it and its code 1. i look up code 1 and it also says code 1 is a oxygen sensor. why with one ecu i was throwing the code 41 oxygen sensor and now im throwing a code 1 oxygen sensor? and why is there 2 codes for an oxygen sensor?

SpoolnByYou

Honda Bull

I've noticed this, too. If you search you'll find that some people throw 41 and some throw 1. My friend just threw code 1 on his LS/VTEC build and I didn't believe him when he said it was O2 sensor. But it was.

SpoolnByYou

what ecu is he running?


so is it basically the same code? or maybe one is primary and one secondary? oh wait,n/m obd1's only came with 1 oxygen sensor. so why 2 codes for 1 trouble? is there different meanins between a 41,and 1

Honda Bull

He was running a P05??? chipped to a P72 with a tune on it for a manifold.

All of the ECUs for OBD1 have the CEL 1 and CEL 41 as O2 sensor codes. I looked in the HELMs manual. Each code gives like one or two different possibilities as to what is wrong. The code 1 could possibly be the ECU or fuel system. Could be a few things.

SpoolnByYou

fuel system? any ideas?

k20pRoject

Possibly there's a restriction in the fuel supply....and code 41 is for the o2 sensor heater...the point of the heater is to warm up the o2 sensor so it can adjust the air/fuel mixture quicker...permits faster warm-up. Check the 2 black(i think...there should be 2 wires of the same color-heater) wires in the 02 sensor, maybe they are loose.

Gadget

Uh, P05 Chipped to a P72? PO5 could never run IAB or V-TEC.. Chipped or not.. unless it was converted..

Here's a code list Look for yourself..

http://www.hybridgarage.com/tech/codes.html

It even tells you what year cars the code covers...

Sounds like Maybe a slight wiring difference between the 2 ECU's?

Honda Bull

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gadget &raquo;</TD></TR><TR><TD CLASS="quote">Uh, P05 Chipped to a P72? PO5 could never run IAB or V-TEC.. Chipped or not.. unless it was converted..
</TD></TR></TABLE>

It was P05 or P06.... P06 now that I think about it. It wasn't running the IABs... it was a GSR tuned with a Skunk2 intake manifold. So the IABs weren't necessary.

SpoolnByYou

well when i went to go get my car tuned the other day,the car would start to break up above 4,500rpm's. could this be a problem causing this? i mean right now im not running any 02 sensor,and havent since ive been turboed and havent had a problem

Gadget

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpoolnByYou &raquo;</TD></TR><TR><TD CLASS="quote">well when i went to go get my car tuned the other day,the car would start to break up above 4,500rpm's. could this be a problem causing this? i mean right now im not running any 02 sensor,and havent since ive been turboed and havent had a problem</TD></TR></TABLE>

sounds like a fuel supply problem.. try replacing the filter..

SpoolnByYou

the filter is only barley a year old,i have a walbro 255lph fuel pump.


my tuner said it could be a weak link in the ignition system. he reccommend me go get a new factory dizzy and come back,sound right?

so number 1 code is 02 sensor AND something in the fuel supply malfunctioning?


also,if this has anything to do with anything. i have an EX gauge cluster in my CX,and since i got it tuned (or tried) my cruise control light stays on and wont go off. CX's dont even have cruise control....AND im using a p05,the cx ecu with hondata,CX's dont have cruise control! wtf?????


Modified by SpoolnByYou at 12:37 PM 3/24/2006

Gadget

That's wierd **** there.. As far as I know, swapping a cluster has nothing to do with function of the ECU, UNLESS it's facking up the VSS signal to the ECU by shorting it or something... Does the Speedo work perfect??? Honda ECU's actually use a [Speed Vs RPM Vs Clutch Switch] calculation to figure out which gear you're in and it enrichens fuel accordingly due to load.. I think it'd be hard to mess with the VSS signal without throwing a CEL but anything's possible..

The distributer story..? I don't know if I trust that.. Do you have a ignition map that you can print out?? Find a point on the map lets say 6000 RPM and WOT (0in vacume) what's the value? On a stock 273 rom (GSR) the low cam Ign Timing should read about 21-23* at WOT and 6000 rpm.. If you borrow a digital timing light from a friend, set your initial timing at 16* like stock, Now set your timing light to ~22 degrees, Rev the engine (Wide open throttle) to about 6000 RPM and you should briefly see the TDC mark on the crank almost perfectly line up with the 0 degree mark on the timing tab.. That's if you use a Stock GSR ecu.. If everything checks out, your Distributer is good.. Or, basically if you just rev it and the timing mark moves according to the timing light, you could guess it's good. My way's a little more work but it's more accurate..

You COULD possibly just have a weak coil.. at higher RPM the coil has less charge time and could missfire if it's weak..

SpoolnByYou

yeah i dont have an ignition map,b/c i didnt take anything with me when i left the tuners. But i do remeber the ignition numbers. initially,we set the ignition to 14*. i might have this worded wrong,but my tuner said we are VERY conservative with my timing. he said he called some people and timing should not jump over 25*,and we were at about 21*. Now i have no idea where on the rpm range we were reading 21*. but he said timing was very conservative,that i probably have a weak poin somewhere in my ignition,so he reccommend me get a new factory dizzy. im still waiting to do so and go back to him.

Now with the car as it sits right now,at WOT the car wont go past 4-4,500 rpm's without breaking up. if i push past that it breaks up and sputters,and boost sits at about 19-20 pounds.

Gadget

You have a AFR guage? Running a turbo I hope you do.. What kinda AFR's are you seeing around 4500? It probably wouldn't hurt to own a EGT guage as well, since boosted cars are more subject to minor problems that can be fatal for the engine.. If you do have a EGT, how hot is it getting? With the AFR guage and the EGT guage, you can diagnose just about anything.. I'd try borrowing a friends dizzy before forking out good money on something you're not sure you need..

It sounds more like a weak coil or a fuel problem.. are you monitoring fuel pressure? What size injectors are you running?

SpoolnByYou

i dont have a AFR gauge or an EGT,but A/F around 4-4,500 was i think he said 11.7,so not to bad. i know i need,and trust me i want a EGT gauge,but they are so damn expensive,lol. im running RC550 injectors,and no i dont know fuel pressure. instead of getting a new dizzy,cant i just replace everything inside it and it be basically the same as a new one except the bearings are still being used?