Whats up guys, well i need some help. My lil bro has a 88 CRX and he cant pass inspections and the guy at the inspection place told him that it might be his EGR valve or his cat.. well im hoping that is not the cat since he doesnt have the money for a new one since he only works at Whataburger.. Well i was reading on a CRX page that you can clean the EGR, now how do you actually clean it? and where is the EGR located? Can I just block off the EGR and maybe it would pass or should i clean it?

Thanks in advanced..

I forgot is a 88 CRX DX..

 

I don't even think CRXs ever had an EGR.

 

Well i saw that on the http://crx.honda-perf.org/ it says that you can clean it.. does anybody know where the EGR is at?? I tried to post it on the link above but my ID hasnt been approve yet..

 

This is what the EGR looks like.


I'm selling it - $20 shipped would be a nice price.

I'm going to assume the trim of your CRX is an HF???

I have cleaned mine a couple times when I had that motor. Just unbolt it and look into it's ports. It's going to have carbon build up in there. Take some thick pipe cleaners to get in there with some brake cleaner. Do not submerge the EGR in solvent! It will eat up the rubber diaphram and the EGR won't work anymore.

If you block off the EGR port and remove the EGR your ECU will get a code. Your emissions will be bad too.

If the EGR is fairly clean then it's either the cat or the O2 sensor. I'm suprised the smog tech didn't suggest the O2 sensor to you. That's one of the other things that makes the Nox go up. I'm going to guess that's where the engine was failing during inpection because that's what the EGR is on there for. The cat really doesn't do much for NoX so I wouldn't run out and change it until you are sure - those things cost $$$

Do you have the test results from the smog test?

 

Can someone tell me, what exactly is the ecu looking for? what signal is it that indicated the lift of the egr valve?. I'm trying to figure out a way to wire something in the path of the egr signal wires to fool the ecu on my h22 motor. Is the ecu looking for a resistance reading, an open circuit, a short, or something else? me thinks it is not an open circuit, because my egr is not plugged in and I still get the CEL code.
thanks in advance.

 

I think the guys at jdmshit.com can gt you an H22 ECU that won't look for EGR.

Anyway, the EGR lift sensor is on the top of the EGR. If you got a block off plate and just left the EGR plugged in then it would fool the ECU. Why bother though? Just leave it on... it's not hurting anything.

BTW - the EGR works by vacuum. When the manifold pulls a vacuum it pulls a rod up in the EGR and the lift sensor detects that motion. if the rubber diaphram has a hole in it or is rotted away then the EGR won't hold any vacuum and you will get an ECU code for it. You can test the diaphram by sucking on the vacuum port on the EGR. Suck, stick your tongue on the hole and it should stick there. If not then the diaphram is dead and you need a new EGR.

 

what failed him? if the NOx is too high, the egr valve probably just isnt opening, or the ports are clogged up.

 

I think that it was the NOX that failed but ill have to get the sheet from him.. I do know that it was 2 things that failed but i have look at the paper..

4drEF he said that he might be interested in buying that EGR but let me talk to him again to decide what he wants to do..

Thanks guys for all the responses and sorry for replying late, i only have the net access at work..