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Found 1 result

  1. Hello, I need to pass emissions in California with my 1994 Loyale. When I took it in to get tested it passed everything except for the visual of the EGR system. The tech said that when he pushed the diaphragm on the EGR valve, the car should stumble and/or die, but it didn't, which he said was a symptom of clogged EGR passages. I took the EGR valve off, cleaned it, the stem moves well, even when on the car and I increase throttle to 2500 rpms. The carbon deposits didn't look too bad. I tried to clean the passages with a speedometer cable and some carb cleaner. I found that I couldn't get it around some of the bends in the passages. I knocked some carbon loose and vacuumed it up and tried blowing air down the passages. When I reinstalled the valve again, the car still wouldn't change its idle when I pushed the diaphragm in to open the valve. In fact the car ran fine without the EGR valve on (it was louder since it was blowing exhaust gases out of the lower hole). The EGR valve moves when applying vacuum and holds it when I keep the vaccum applied, so it doesn't leak when it is closed and is not seized. Also, the vacuum hoses don't seem to have a leak, since it opens at higher RPMs. I also have a 35ohm resistor mounted on the purge valve solenoid instead of the old stuck solenoid in order to clear the CE light. Would this effect the car and keep it from dying when pushing the EGR valve diaphragm? Or is it a completely different system? The EGR solenoid is brand new. What do you recommend that I do? Is the tech right? Are the EGR passages clogged? How do I get at them? I unscrewed the flare nuts that hold the 90º EGR pipe in place, but seemingly couldn't remove it without taking the intake manifold off. Also, I remember cleaning that pipe 10K miles ago when I did the head gaskets, so I imagine it is other passages? Does anyone have a diagram of how the passages run? Any other tests I can do? Many thanks!
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