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Originally Posted by Kep
I expect that you have already looked but when I cleaned my EGR valve I found a carbon blockage where it attatched to the throttle body and found heavy buildup in the lower vaccum hose going between the modulator and the egr valve.
Just a thought,
Kep
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I checked the EGR system, all the ports are clear on the T-body and pull around 10 in hg at 200 rpm. The modulator appears to be working properly acording to chiltons, and the temp vavle in the water neck is new. The only thing in the EGR system that is suspicous is that the vacuum fluctuates bewteen the EGR valve and the modulator at 2000 rpm, bewteen 7-12 in hg. The hose between the EGR and the modulator is in good shape with no leaks and the EGR valve is lean with no build up as well as the pipe from the exhaust to the egr.
