krucial7integra

Ok, I've searched on this topic and notice that different people have solved this with diff. situations. I just picked up a '96 gsr and need to fix these problems to get emissions done.

So far I've picked up: new rotor button, ngk plugs. I'm hoping this will solve the problem but may need more input.

The car runs fine, idles fine, no problems what so ever, so why am I throwing these codes? code 71-74.

Also I'm throwing a code for both o2 sensors. The car has dc headers but there is no o2 bung on the header, how would I go about fixing this? get a new header?

weavertime1

iTrader: (2)

You need two O2 sensors in order to not get a code for O2 on OBD2 equipped cars. Usually one is needed before the cat, and after. As for the misfire...try a new set of oem plug wires,and a cap as well, if the rotor doesn't do the trick.

krucial7integra

thanks, I just changed the rotor button and spark plugs. Runs perfectly fine but still throwing that code. I'm going to try to change out the cap and wires today.

weavertime1

iTrader: (2)

Did you clear the code after you changed the things you did??

krucial7integra

yup, I had the negative terminal off the whole time I was replacing those items. Still throws the code. Hopefully a new dizzy cap and wires will fix this. I just don't understand, the car runs fine with no issues.

krucial7integra

Just changed the dizzy cap last night. Still no luck. The ignition wires aren't in stock anywhere around me so I'll probably have to order them. The car still runs perfectly fine.

weavertime1

iTrader: (2)

I hope wires does it...my buddy had a '99 GSR that did this, and it was wires...

krucial7integra

problem is now fixed. I guess giving it a full tune up worked.

Now I'm only throwing code 41 and 65. Primary and secondary o2 sensors.

weavertime1

iTrader: (2)

My guess must have been right, as usually a misfire at a certain cylinder means a wire malfunction, as compared to being a random misfire. As for the O2 sensors...You need to have a cat that has two O2 sensor holes in it (one before the cat, and one midway or after it), or a header with an O2 sensor in it, followed by a cat with an O2 sensor hole in it. In OBD2 systems the sensors work in conjuction to measure the oxygen level readings of the O2 sensors before and after the converter to see if the converter is reducing the pollutants in the exhaust. If it sees little or no change in oxygen level readings, it means the converter is not working properly. Here is another option however....even though it may not be legal or cheap. If you have an OBD1 ecu or can get one, you can run the system with this ecu if you use an OBD2B to OBD1 jumper harness. Unfortunately not all states are like Pa (in the NE anyway), and in some states if your car is OBD2, it has to have the ability to be plugged in to a scanner tool. If you switch to OBD1 the scanner tool will not work in your car making it fail your states' inspection. Good luck!

Avtarios

Hey might be a little late but I had the same problem and ended up spending upto $3000 trying to figure out this problem and at the end I opened up my valve cover and checked the valve lash and found that on cylinder 1 and 3, which i was get a misfire on, the exhaust valves needed to be adjusted. They were too tight i dont know why maybe the previous owner had them set to tight as per racing specs but i put them back to stock specs and now the misfire is gone, I have driven the car hard and let it idle for an hour straight and still no signs of the misfire. Hope this helps and saves you unnesecessary repairs. Cheers