OldBlue_88
Newbie
I have a 1988 GMC Sierra 305 with 400 Turbo that on longer drives has the Service Engine Soon light to come on, but almost never on with shorter (5 to 10 mile) drives. Once it does come on it almost always stays on until the engine is shut off. I will say that there really isn’t a noticeable difference in how the truck runs with the light on but still would like to resolve the problem if I can. I have performed the paperclip check and got only one code, a code 32. My search indicates that a code 32 is EGR related, but so far that is all the information I have found. What more do I need to know concerning that code? I currently have the two nuts for the EGR valve soaking in PB Blaster so hopefully I can eventually get the valve removed and checked without causing myself a lot more work. I have noticed that the module that appears to control the vacuum to the EGR valve has another vacuum port on it that is open. Is there supposed to be something attached to that port or should it just be closed off? Any and all assistance is greatly appreciated. Thanks,