I am looking for a pr3 so I can run vtec off my b18c 89 crx si. I have a 91 integra obd0 pr4 in the car just to run it now and I am running open header with no o2 sensor hooked up yet. Would this cause the car to have bad bottom end?? Also I have the problem with the idle at about 1800. I changed the tb gasket and checked all the vacuum lines. I was wondering if it had to do with the pr4 having different volts than a pr3, causing the map sensor not to read it right. Lemme know, thanks

 

not having an o2 sensor will screw w/ things bc thats one of the ways the ecu regulates fuel consumption. why is your car idleing at 1800? and no it wont kill low end


[Modified by TorteX, 1:37 PM 4/30/2002]

 

I have no idea why the car is idleing so high???? I ve tryed almost everything. Tomarrow Im going to get a pipe made from the header back and im probably gonna have then put the o2 sensor on the piping. Would you have any ideas on why it idles like that, could it be the o2 sensor that is screwing the bottom end and the idle??

 

Did you say not having an o2 sensor can mess with the bottom end??

 

adjust the idle screw deal on the tbody (flat head screw about 1/4inch diameter, its grey). have you had the car warmed up completely and it still idles high? wait for the fan to kick in atleast once before you adjust idle. also could idling high to heat the o2 sensor. ecu doesnt do anything w/ em till their 600* F. and if it does see it it'll throw a code for it. get an o2 sensor tho

not having an o2 sensor meses up everything bottom, mid top anything


[Modified by TorteX, 1:41 PM 4/30/2002]

 

Maybe if I actually plug it into the harness it will idle better. I dunno, im gonna get it put into my 2 1/2 inch pipe tomarrow. It doesn't matter if i have a cat or not right. I can just have them put it into the pipe as long as it is there? Also is it ok if im only using the one o2 sensor, that can with stock crx si harness??


[Modified by HybridRexy, 8:22 PM 4/30/2002]

 

yeah its got to be on the down pipe some where. you want it to be as close as possible to the motor but still have all header pipes running to it. bleh
ex:


thats a jdm style itw header so it would idealy be back that far. if you have a stock header or something same idea applies


[Modified by TorteX, 8:27 PM 4/30/2002]

 

o ok, that probably will solves the low end and stuff, but I have tryed to adjust the idle and it just wont work. I have tryed the grey flat screw and it is turned all the way to the right as far as it can go.

 

let the car warm up (fan turns on at least once) before you adjust anything. egr could be stuck or thurmostat could be stuck

 

Hmm ok, I dont even think my fan is going on, ill have to check that, hey do you have a pr3 computer. Thanks for all your help bro

 

you have to un-plug the IACV , then adjust the idle , plug back in reset the ECU and you should be good to go

remember adjust the idle after the fan kicks on and with no acc. on

 

you really should have to but if you dont get any results unplug it. make sure all accessories are off, heater fan radio lights etc

 

Ive taken put the iac before and the idle drops but when i plug it back in the idle rises again. The idle screw above the tb port is turned all the way to the right so I cant adjust it anymore. So if I pull out the iac should I leave it unplugged,reset the ecu and then plug the iac back in???

 

i posted the correct steps

1 - UNplug iacv
2 - adjust idle
3 - plug the iacv IN
4 - reset the ECU

 

What if before I unplug the iac, the grey adjusting idle screw is already turned all the way to the right as far as it can go??? What do I do then??When I plug it back in it just idles higher??

 

ur a dirty geek hybrid rexy u dirty fool