Join Date: Apr 2001
Location: eustis , Florida
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EGR sensor resistance values?
Im getting tired of that persistant 31 code on my EECU. I checked my EGR valve with a mightyvac it pulls and holds good vacuum.Checking the sensor as HAYNES describes, it has the proper resistance in the closed position however it will only go down(and with a smooth transition)to 1000 OHMs w/20 inches of vacuum.The manual has a misprint because at one area it says test it with 10 inches and another at 20, however the values are the same in that it should read approximately 100 OHMs.
Anyway, my Question is, is the sensor bad, the wrong one? even testing it off the EGR, i can only get it to read 600 OHMs with the rod depressed all the way in.
Also, whats the easiest way to check the EGR solenoid? I can only find a procedure in the manual for the later EVR valve which looks different than my 86 set-up...
Im still having a funky idle from time to time since i put the new motor in back in JAN. but the 31 code has been there for a couple years so not sure if its the culprit.
BTW, it pulls excellent vacuum so i know its nothing mechanical or a vacuum leak[img]/wwwthreads_images/icons/wink.gif[/img]