Is this noise from EGR Valve Normal?

'94 lebaron 3.0l: egr issue?

• QUESTION: Hi Roland, as a followup form yesterday, we were discussing the EGR Valve on my 94 Chrysler lebaron. 3.0 V6. Anyway I have pull the EGR, checked mechanical functionality(vacuum) and it appears to be good. so now it leads me to the electrical functionality. How does one test the EGR Circuit? I have checked for a EGR Fuse, relay or anything like that but to no avail. Also on this vehicle, it will not idle at all. If I look at the throttle body/ where the cable comes in there is no adjustment that I'm aware of plus I'd hate to adjust it as just last week it was running fine. I do hear a high pitched noise coming from the vehicle, which kind of leads me to a vacuum loss somehwere, but I'm not sure. like I said earlier the vehicle just will not idle at all, it will drive as long as I'm there to give it gas and keep a constant pressure on the peddle. Any thoughts? ANSWER: Hi Paul, The '94 manual is a bit confusing in that it describes the egr control system fully in the text but I am not seeing the wire for the electrical egr transducer in the wiring diagrams. Probably the best help would be for me to copy the text about the egr system and postal mail you about 5 pages. So if you will tell me your postal mailing address I'll send those to you. Thanks for the rating and nomination. Roland ---------- FOLLOW-UP ---------- QUESTION: Hi Roland, I can actually get that information myself, I have the yellow factory service manual for this car(it's just not close to me in proximity.) I appreciate the offer though. just one question, As it appears to me to be a EGR issue and the engine codes appear to be pointing that way as well, does it make any sense to check compression on this engine? the reason I'm asking is that this engine has recently gone though a complete seal and gasket replacement, including head gaskets. the engine has approximately 500 miles on the new gaskets. The car does not overheat and does not contain antifreeze in the oil that I can tell. Thanks ANSWER: Hi Paul, I doubt it is a compression issue. More likely the egr or a vacuum hose or possibly an intake manifold leak, thought usually the pcm will, if the oxygen sensor is working, compensate for extra air leak in by increacing the injector pulse widty which of course raises the rpm. An exhaust gas leak on the other hand doesn't produce the same result, rather the reverse. Roland ---------- FOLLOW-UP ---------- QUESTION: Hi Roland, this is getting interesting. I pulled the vacuum line leading from the black valve body of the EGR(Where the electrical connector resides) and the car started right up and idled at about 600 RPM. (I drove it several miles that way) If I try to put that line back on or plug that line, the car will immediately die. Does that help at all with the diagnosis?

• Answer:

  Hi Paul, There are several possibilities, all covered in section 25 of the manual which you have access to. Rather than going through all that would you be able to avail yourself of those pages in the near future? Thanks for your understanding, Roland