Got the obdI b18c in my 99 cx to start up... getting codes 41 for primary o2 heater and 14 for Iacv. Car won't rev past 1.5k. will either of these codes restrict the car from reving past 1.5. Also idles really low, and sounds like it wants to die all the time. if you rev it to 1.5 sounds like it's redlining, then sometimes, when you let go, car dies??? anyone with suggestions of help?


Modified by bogus_ek at 7:37 PM 4/25/2005

 

anyone help for limp mode?

 

bump for my hottie so we can get his baby roaring!!!

not me, his car

 

Niether of those two codes should prevent you from running the engine up to redline.

What ECU are you using? Did you do the 3- to 2-wire IACV swap?

 

using obdI p72.... did the iacv 3-2 wire swap just as described by katman. had to rewire an obd2a dizzy to my obd2b harness... if i rewired wrong could that cause limp mode, and if so how come no dizzy cel codes???

 

to me it sounds like you have the tps and iacv plugs mixed but if you did the 3 wire swap then i guess you have that right. Neither one of those codes should cause the car to respond like that.

 

so i still don't know what is causing the ecu to go into limp mode then.... any other suggestions???

 

anyone???

 

Check the timing, not ignition timing but valve timing, if that's all good let us know. It sounds like your EK may be bogus afterall, lol. Sorry I had to.

 

by valve timing, do you mean check the valve lash clearance?

 

so no one else with limp mode probs???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bogus_ek &raquo;</TD></TR><TR><TD CLASS="quote">by valve timing, do you mean check the valve lash clearance?</TD></TR></TABLE>

Timing belt. You have valve timing which is mechanical and doesn't change, then you have ignition timing which is electrical and the ecu can modify. Redo your timing belt, or pun a timing light on it.

 

i had a similar problem. check yo firing order. timing/ignition. if yo car is shaky, idling low.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bogus_ek &raquo;</TD></TR><TR><TD CLASS="quote">by valve timing, do you mean check the valve lash clearance?</TD></TR></TABLE>No I mean make sure your cam gears are at TDC and the crank is at TDC. From there check the wiring to the IACV. This component will keep a car from reving. And then check the wiring to the o2 sensor. You got a factory service manual for this car? Good luck man.

 

I know cam gears are set right, and crank pulley are set right at tdc. i had to do this to get the car started cause when i first tried to start it, the timing was way off, so i just got done re-setting it. i'll check the wiring for iacv and o2.
firing order is correct too... on dizzy it goes
34
12
and its
4321 from dizzy to cam gears.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bogus_ek &raquo;</TD></TR><TR><TD CLASS="quote">I know cam gears are set right, and crank pulley are set right at tdc. i had to do this to get the car started cause when i first tried to start it, the timing was way off, so i just got done re-setting it. i'll check the wiring for iacv and o2.firing order is correct too... on dizzy it goes
34
12
and its
4321 from dizzy to cam gears. </TD></TR></TABLE>

Definitely check the wiring, most times CEL are wiring or a part has malfunctioned. Most of the CELs are for CIRCUIT issues. IE Wiring or electrical operation of the component. Think about it, it's so much more difficult for an electronic computer to recognize mechanical issues without an electrical signal describing what is going on. OBD = On Board Diagnostics System... I will post the FSM pages for your CELs in a moment. Just to confirm you are running an EG chassis? D-series motor?

 

Ok start with this. Here is the IACV flowchart. If you don't understand something let me know.




Run through this and fix this CEL first, then let me know when your ready for the next one. Happy Fixin' bro!


Modified by HondaFanatic708 at 12:54 PM 4/29/2005


Modified by HondaFanatic708 at 1:40 PM 4/29/2005


Modified by HondaFanatic708 at 1:41 PM 4/29/2005


Modified by HondaFanatic708 at 1:41 PM 4/29/2005

 

running a ek 99 cx with a obd I b18c. using p72 off the same motor. i am assuming it is my wiring because, i had to do the 3-2 wire iacv switch, and i had to extend my o2 sensor, so my wiring prob went wrong somewhere.

 

**** then this is gonna be wrong, this is just the CEL 14 off a P28 ecu (or any EG chassis, D-series). Lemme check my teg one...

Ok I'm gonna have to pool for the right service manual, gimme a minute.

 

Ok here you go...

Go to http://www.redpepperracing.com/technical/143/aex

and http://www.redpepperracing.com/technical/143/aey

Enjoy

 

thanks for the diagrams.... got rid of the 14 code.... 41 still there. redid the wiring etc. think i might try replacing it. will keep you guys updated. thanks again

 

Code 41 is for the O2 heater element - just unhook the O2 sensor from the main engine harness and measure the resistance between the two black wires: 15-40 ohms is Helms spec.

Don't throw parts at a problem - its not how you fix'em.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bogus_ek &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the diagrams.... got rid of the 14 code.... 41 still there. redid the wiring etc. think i might try replacing it. will keep you guys updated. thanks again</TD></TR></TABLE> Well that's good.

 

now I'm at a lost... got rid of all cel... no more lights, but car is still not running right. idle never stays consistant. sometimes normal, sometimes high (2k), sometimes just enough for the engine to stay alive (&gt;500), and sometimes bouncing between 500-1.5k. can't rev motor past 2k, and if you hold the gas pedal down, then it just bogs like its going to die. kinda demoralizing now, because I don't know which direction to go in. anybody got any suggestions??? Thanks in advance.

 

any help at all???