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Egr valve solenoid

 
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Old 07-11-2012, 02:28 PM
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Egr valve solenoid

If any one has the control box and you don't have to worry about emissions could you hit me up and sell me your egr solenoid cause my is garbage and I can't find one around... I live in California so you can probly guesstimating junk is passing smog thanks guys
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Old 07-11-2012, 02:29 PM
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Re: Egr valve solenoid

Wow that was supposed to be "guess that my" not guesstimating ?? I'm on my iPhone that's probly why
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Old 07-11-2012, 04:22 PM
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Re: Egr valve solenoid

Have you tested it before determining that it's bad? If so, how? Just trying to help. :)
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Old 07-12-2012, 01:09 AM
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Re: Egr valve solenoid

yea i have no vacuum coming out of that line and i tried it with a load, driving it with a vacuum gauge hooked up and i had nothing so i just want to replace it and see if that fixes it.
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Old 07-12-2012, 01:10 AM
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Re: Egr valve solenoid

I've had that problem for two years. 12 VOLTS GOING TO ONE TERMINAL AND THE OTHER GOES BACK TO THE ECM. Went through 3 solenoids and 3 ecms but still won't open at all. Instead of grounding it to the ecm like it's supposed to be, I actually grounded it to the negative side of the battery and then it clicked open and close no problem.Still trying to figure it out. To pass emmissions here I ran the car for an hour then retarded the distributor as far as I could. It passed the NOx by 2 points.
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Old 07-15-2012, 04:06 PM
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Re: Egr valve solenoid

Oh nice man so you think I should try your rig out and see what happens? That doesn't sound like a bad idea
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Old 07-15-2012, 04:31 PM
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Re: Egr valve solenoid

How do you know it is the EGR?

I've read about the EGR ports inside the intake manifold will clog up. That would be the same as not having the EGR functioning. Besides, the EGR opens only when the car is cruising, not at idle and not during hard acceleration. You can't really determine the problem is the valve itself unless you know what to look for. Almost always the valve or intake manifold ports are clogged up.
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Old 07-16-2012, 06:59 AM
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Re: Egr valve solenoid

I've cleaned my ports out and when you pull vacuum on the egr at idle it dies just like it's supposed to. Check that first to see if it dies. If it does then your ports are good. The problem is that there is no vacuum on mine being pulled cause the stupid egr solenoid isn't opening to let vacuum go to the egr valve. Soon you'll be pulling your hair out like me. It opens a little when you give it gas but at 2500 rpm's it should allow a lot of vacuum to go to the egr valve. That's why they do the second check at the emissions stations at a higher rpm. I still get nothing. I even borrowed a working one from an accord and hooked it up to my lude and still had no vacuum. So I'm guessing it's probably the ecm even though I've got three here that work great. Need to see what the resistance should be on the ground side going back to the ecm. Anybody know? But if you wanna pass emissions like me Then get it as hot as you can and retard it as much as you can. Since it burns the fuel in a shorter time it'll be richer and run cooler. My O2 and htdrocarbon check was still good but the NOx was still high but I barely passed.
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Old 07-16-2012, 07:03 AM
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Re: Egr valve solenoid

Next trick is to get a small metered orifice to go from the ported vacuum to the egr valve. It'll pull a vacuum on it but won't let the engine die. That's what the solenoid is supposed to do but I'll let you know at the end of August if it works. You can try it and let me know. Remember it's gotta be a small hole or you'll kill the engine. Good luck.
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Old 07-16-2012, 07:14 AM
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Re: Egr valve solenoid

If the EGR valve does not lift when it is supposed to, it will throw a CEL and a code for the EGR. Do you have a code?
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Old 07-16-2012, 08:19 AM
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Re: Egr valve solenoid

No codes at all! No check engine light and no lights flashing on the ecm. I know that if the lift sensor on the egr is sticking or not lifting then that'll throw a code. But our problem is there is no vacuum coming out of the egr solenoid to go to the egr valve. I wish it was an OBD2 car so It would tell me what the hell is wrong.
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Old 07-16-2012, 08:23 AM
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Re: Egr valve solenoid

oNLY THREE OPTIONS for diagnosis. 1 Find out what the resistance is supposed to be on the ground side of the egr solenoid going back to the ecm. 2 Get a brand new egr valve not used. Or 3 Get a brand new egr valve solenoid not used. Expensive diagnosis for an OBD0 CAR.
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Old 07-16-2012, 11:15 AM
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Re: Egr valve solenoid

yea thats exactly my same situation man i tried driving around with a vacuum gauge hooked up to it to see if it would register anything when i had it up at cruising speed instead of just idle and nothing! its so aggravating to keep coming back to the same problem over and over, and also no cel! the only code i have is for my vss i gotta take it apart and check it out.
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Old 07-16-2012, 02:07 PM
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Re: Egr valve solenoid

some pics
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Old 07-25-2012, 07:52 AM
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Re: Egr valve solenoid

Got another egr valve solenoid and it reads 17 ohm's. Gonna change it out for the fourth time but will let you know how many ohm's I've got on the return wire going back to the ecm. Also noticed that when you pull vacuum on the egr valve that the diaphragm lifts up and pushes up a little pin which is the lift sensor. A few of those pins will stick so I'm gonna check that out and lube if necessary. Will keep you posted.
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Old 07-27-2012, 12:08 AM
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Re: Egr valve solenoid

cool man i kinda forgot about this because i've kinda given up on the damn thing for now just sick of trying to diag it and if i had extra money i would just take it too shop i know who does good smog diagnosis and tell them to fix it no matter what but for now i just gotta put some space in between me and the dang egr cause its so frustrating
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Old 07-27-2012, 01:04 AM
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Re: Egr valve solenoid

Got about 4 mega ohm's at idle on the return wire going back to the ecm. When I revved it up slowly it climbed up to 8 mega ohm's . That's way too much resistance to provide any ground. Also when you revv it, the resistance is supposed to get lower to get you closer to a real ground . Even the avionics guy here at work said that somethings wrong. I told him that it's my third ecm and they all didn't help which makes me think it's an input going to the ecm to control the egr solenoid to slowly ground. Anyone know what parameters are needed for the ecm to figure out when to close the loop? Water temp, throttle position, or who knows?
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Old 07-29-2012, 11:33 AM
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Re: Egr valve solenoid

The Avionics techs are very smart and good with aviation stuff. All Avi* techs I know or heard of that have looked at a 3rd gen Prelude have not been much help. I'm not sure if they just don't know, don't care, or don't have the time for it. Whatever the reason, they are not very successful with this chasis's electrical.

What you need is this:
http://www.preludebible.com/service-...ion-system.pdf

The wires going to the EGR may only be sensor related... there is a set of wires in the black vacuum box that control the lift.
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Old 07-29-2012, 12:03 PM
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Re: Egr valve solenoid

Everything that I've researched says that the lift is only regulated by the egr solenoid by the ecm only. I'm getting voltage everywhere it's supposed to be and plenty of vacuum all the way up to the solenoid but for some reason, The ecm isn't telling the solenoid to ground.Went through 3 ecm's already. Guess the only way to know is to borrow someone's good one to check. Plus there's no code for the egr which means the lift sensor is good. Holds vacuum great. Engine dies instantly.
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Old 07-31-2012, 06:08 AM
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Re: Egr valve solenoid

Poked a few holes in the vacuum line going to the egr valve after hooking up ported vacuum. Just enough to get it to run o.k. Still failed emissions so I'm gonna get some dry gas and 87 octane and retard the crap out of it and hopefully I'll pass like last year. When you retard it, You're not burning all the gas so it helps cool the chamber.That's one reason the NOx is high. Also since it's a JDM B20A It's got higher compression 9.4:1 That might be another reason why it burns hotter.
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Old 09-01-2012, 01:11 AM
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Re: Egr valve solenoid

Just passed emissions for another year. Run it hot for a good half hour and loosen the dizzy and rotate it toward you to retard the crap out of it. Won't run perfect but I passed again. Since it fires at almost tdc the fuel doesn't completely burn which cools the cylinder. The HC reading will be a little high. Hope you got a good cat to burn off those extra hydro carbons.
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