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1984 500sel idle

3202 Views 6 Replies 4 Participants Last post by  48hp
Hello all, I've done a search and now I'm totally confused [:(] I have a 1984 500sel, the idle "stumbles" most of the time when its at op temp, the oil gauge also jumps around while its doing this... thought it was due to rpm dropping then going back to normal but after reading some posts I'm not sure now... something about it being tied into the idle circuit. Anyway it also stalls sometimes when you come to a stop. From what in can figure out I need to clean the air valve and check the elec. box for cracked or cold soldier joints. The elec box is the easy part once I figure out where it is as I've fixed many "junk" Volvo overdrive relays in the past. I guess I'm asking if I'm on the right track and is there anything else I can do?

Thanks in advance for your help:

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Thanks for the Pic MBL... all the "tune-up" parts are great. I've sprayed all injectors and vacuum lines with card cleaner and WD-40 just to double check, good there... filters are newer (last 6 months). The car has had the idle thing since we bought it last year, just started stalling when coming to a stop, when I did all the plugs etc I thought the 600ish idle (by the tach) was kinda low until I looked it up... the car only has 117k on it and runs like new except for the idle. The valve is soaking right now, when I pulled the plug on it the idle inceased which if I read the posts I searched correctlly means its working. I'll pull the box and redo all the joints tonight just for good measure.

Thanks again
Haven't pulled the O2 yet. If I can figure out how to post pics of the idle control box the jacks terminals have some cold joints but othe wise looks ok.


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