DevilZX Posted May 19, 2009 Share Posted May 19, 2009 I have an '82 280zx turbo basically stock. I have an idle from 1200-1500 rpm on cold or warm starts. It was idling low yesterday at about 600 rpm. The only change I made was the installation of an intercooler and BOV. There are zero vacuum leaks and I tried disconnecting the battery but that did nothing. I did remove the AAC once because I had a problem with the car not starting (didn't have the hose that ran from original J-pipe hooked up). I also tried starting it with the wire that runs to the distributor unplugged (forgot about it) and without the coil wire feeding the distributor (forgot too). I put everything together but now it won't idle any lower. Could this be a faulty AAC? I pushed up on the pin to be sure it wasn't stuck but maybe I broke it while doing so. Any help or suggestions are greatly appreciated! Quote Link to comment Share on other sites More sharing options...
DevilZX Posted May 20, 2009 Author Share Posted May 20, 2009 I forgot to mention that I also removed the A/C belt, condenser and all the lines. It idles now at 2000 rpm. This is getting nuts! Please, give me some suggestions! Quote Link to comment Share on other sites More sharing options...
DevilZX Posted May 22, 2009 Author Share Posted May 22, 2009 Anybody have suggestions? It sucks for daily driving. Wasting a lot of fuel now and braking has become quite difficult. Quote Link to comment Share on other sites More sharing options...
DevilZX Posted May 24, 2009 Author Share Posted May 24, 2009 Ok, So I narrowed it down to a bad AAC or something to do with the A/c high idle circuit. I pinched the big hose going to the AAC and the idle returned to normal! I want to check the A/c vacuum system (which I'm led to believe is the ficd) but I'm not sure if it is on an '82 or where/what it looks like. Can someone point me in the right direction for that? I've tried searching but I can't find a post that tells me a location. Thanks! EDIT: Found service manual and it told me everything I need to know. I'll update as soon as I get this all figured out. Quote Link to comment Share on other sites More sharing options...
DevilZX Posted May 24, 2009 Author Share Posted May 24, 2009 I'm pretty sure it is NOT the FICD. I blocked off the AAC and idle went down to 1000. If I pinch off the hose that goes to the valve entering intake runner #4 (VCV?), idle also goes down. I also found out that my AAC is fine (I sucked on the vacuum hose on top and it held for a good minute until I let off). Now, am I dealing with a bad VCM or that runner #4 piece (VCV)? Quote Link to comment Share on other sites More sharing options...
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