|
Hey all,
Some of you put forward some great ideas on possible fixes to a slow return to idle / high idling problem I've been having. I did some work, Here's the update:
'82 CIS 244 with 159K miles has been slow to return to idle and sometimes pegs at 1500RPM, other times below 1000, but not when the engine is fully warm.
Yesteday I:
Changed injector seals
Replaced flame trap
Took apart, decarbonized, and put new seals on the throttle body
replaced a seemingly minor torn vacuum tube
When all put back together, she turned over a bunch of times and then "Pop!" went a tube going into the cold starter. I plugged that back in and then she started, albeit kind of roughly (settling in to all the new stuff in her guts) and then idled anywhere between 500 - 750 RPM, kind of ocillating up and down. She drove fine last night on a little jaunt around the neighborhood, got right back down to idle and stayed there; pegged at 750. This morning she started right up and idled at 900 RPM or so, this time no dipping of idle. After 15 minutes of city street driving (lots of shifting, etc.) the SAME PROBLEMS RETURNED! Slow to get back to idle and sometimes just pegs at 1500. I trick it down to 1000 and it will just slowly climb back up to 1500 in about ten seconds. I'm so frustrated.
Any thoughts on what it could be now?
I should mention that the throttle body did have some shallow grooves where the butterfly valve met the side of the throttle body, but otherwise the valve and the spring on the side seemed to work just fine. I'm no mechanic, but to me the throttle body looked OK. I've read other posts where people replaced the throttle body and all was fixed. Could this be my problem too? Further evidence that the throttle body is OK, however, is that when the car is running and I turn the spring to open the throttle valve and then let go, there is no binding: the valve appears to close completely and yet the engine still idles high.
I was looking through the Haynes book and it's kind of unclear to me how to set the idle on these '82s with CIS. The later models (83-93) have some sort of screw that you can turn to set the idle; mine has nothing like that. Is mine computer controlled? I have the CIS computer terminal thing on the passenger seat side wall behind a plastic panel. Should I tinker with this? Also, in the troubleshooting section of Haynes it mentioned some auxilliary air valve that I can't seem to find. Anyone had problems with this?
I know this is a super long post and maybe too detailed, but I'm trying to paint as accurate a picture as possible. Any help would be greatly appreciated!
Yours in frustration,
Matt
|
