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03-14-2004, 08:40 PM | #1 | |
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Stalling / EGR valve
My Camry 98 (86k) stalls intermittently at stop sign right off highway. Dealer replaced EGR modulator and vacuum switch valve and didn't fix the problem. Disconnected EGR system to test if EGR valve is the one having problem. Test drived 3 days w/o EGR and had no stalling. My friend helped me cleaned the EGR valve (was clogged with carbon) and run for 2 weeks (70miles/day) w/o problem. However, it happened again yesterday. I took off the valve and checked today. The valve moveed up and down ok when I pushed it by hand and also by mouth (simulates vacuum suck). Found only a bit cotton debris around the shaft, probably from previous cleaning. I did another round of cleaning anyway (use brake fluid). After I finished cleaning and put it back, I did a EGR valve test following instruction from Haynes manual: I started engine and let it idle, detached vacuum hose from the EGR vavle, then put the hose in my mouth and gave it a suck (manual says to use a hand vacuum pump - I checked Carquest cost $50). The engine stopped right away after the suck (opened the EGR valve to let exhaust gas back into engine). According to the manual, when apply vacuum to the EGR vavle, vacuum should remain steady (no leak) and the engine should run poorly (EGR valve should be closed at idle speed or will run poorly - my guess).
My concern is my case is not just running poorly, but stopped completely. Does this indicate anything else may be wrong? I tested again when engine was warmed up to normal, it took slightly longer to die. Does anyone know when exactly the EGR vavle should open and close? I'm still try to figure out whether the vavle is the problem or something else. I think the best thing for me to narrow this down is to disconnect the EGR again right after it stalls again (hope not happen anymore, though)! Any other suggestions / thoughts would be appreciated. |
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03-14-2004, 08:47 PM | #2 | |
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EGR valve is mosly likely sticking. As you come off the highway, and vacuum decreases to the EGR valve, the valve is not closing all the way. I have tested them (off the car) many times and very rarely do I physically see the valve stick open. I have seen it though on rare occasions. Nevertheless, replacing the valve has always fixed the problem.
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03-14-2004, 09:02 PM | #3 | |
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Re: Stalling / EGR valve
You've a very good point. The valve may be functioning differently in real world than when you see it off the car. Have you ever tried to test the valve like I did? Was the engine run poorly or die?
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03-15-2004, 02:23 AM | #4 | |
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Re: Stalling / EGR valve
It the die I too am a ToyotaTech I have tested like u and It will die!
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03-15-2004, 08:45 AM | #5 | |
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Re: Re: Stalling / EGR valve
Thank you. I feel better now. I hope it's the EGR valve problem, nothing else. I drove 35 miles highway this morning and it went ok w/o stalling. Will keep watching.
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04-19-2004, 01:49 PM | #6 | |
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Same Problem,..help
I was told by my mechanic that I have the same problem with my EGR valve...he said if it happens again to just take the valve and clean it. Only problem was that I picked up my car at night after he had left and so I was not able to have him show me where it was located. Could anyone tell me where it is located in the camry and what to clean it with? thanks!
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04-19-2004, 03:33 PM | #7 | |
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Re: Stalling / EGR valve
The EGR valve is located by the throttle body near the linkage.You can clean it using a wire brush-solvents are NOT recommended.
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10-14-2004, 12:23 PM | #8 | |
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Where is the EGR Valve?
Could someone tell me in detail on how to clean the EGR valve. I'm getting the same P0401 message and the infrequent car stalls and would like to get this over with!!
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10-14-2004, 01:13 PM | #9 | ||
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Re: Where is the EGR Valve?
Quote:
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10-15-2004, 10:07 AM | #10 | |
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Re: Re: Where is the EGR Valve?
Is there a picture somewhere on the internet with step by step instuctions? I am a newbie when it comes to car mechanics...
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10-15-2004, 10:31 AM | #11 | ||
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Re: Re: Re: Where is the EGR Valve?
Quote:
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