86subaru Posted July 19, 2005 Share Posted July 19, 2005 after the cars sits over night it starts right up and idles fine, drive it 5-6 miles shut it off for 2-3 minutes ,start it back up it will idle way down and some time even stall , but does not do this all the time , recent tune up, cap,rotor, wires,plugs, fuel filter , acell coil still good, no codes flashing , car has 189,000mi , mpg is 25-26 with ac on, any suggestions ? thanks Quote Link to comment Share on other sites More sharing options...
86subaru Posted July 19, 2005 Author Share Posted July 19, 2005 Quote Link to comment Share on other sites More sharing options...
MorganM Posted July 19, 2005 Share Posted July 19, 2005 My best guess with the above info would be to diagnose the IAC, TPS, and MAF. Quote Link to comment Share on other sites More sharing options...
TurboSPFI Posted July 19, 2005 Share Posted July 19, 2005 So dont turn it off... lol, ok maybe I'm the only one laughing at that. Quote Link to comment Share on other sites More sharing options...
Hank Roberts Posted July 20, 2005 Share Posted July 20, 2005 Any chance you have moisture in the fuel tank that gets stirred up by moving around? It gets in whenever you have a partially full tank, and the night air cools and contracts and sucks moist air in and it condenses and sinks to the bottom. Then gets stirred up a bit when the car's moving. Quote Link to comment Share on other sites More sharing options...
86subaru Posted July 20, 2005 Author Share Posted July 20, 2005 that could be , Quote Link to comment Share on other sites More sharing options...
Hank Roberts Posted July 21, 2005 Share Posted July 21, 2005 So, I dunno -- either gas tank water remover (alcohol), or a fuel injector cleaning cycle (however one does that) or both? I assume water's coming through it might carry gummy stuff past the filter that would mess up the injector for a while, but maybe evaporates or dries overnight? Remember -- I have NO idea what I'm talking about. I've owned my 1988 Subaru for gong on 4 months now and never owned any vehicle so complicated before in my life. It's all gizmos and gadgets .... Quote Link to comment Share on other sites More sharing options...
86subaru Posted July 21, 2005 Author Share Posted July 21, 2005 looked at it very quickly tonight, heard a ticking around the acell coil, all wires good ,ngk plugs, new cap, rotor, ?? Quote Link to comment Share on other sites More sharing options...
Hank Roberts Posted July 22, 2005 Share Posted July 22, 2005 looked at it very quickly tonight, heard a ticking around the acell coil, all wires good ,ngk plugs, new cap, rotor, ?? Ticking? Boy, I don't know even more about this. In electronics, a ticking or buzz or whistle (a really fast 'ticking') is often a capacitor that is just starting to break down. The voltage builds up, and before it reaches its rated capacity, the electrons escape through a low-resistance flaw. Each time it makes an audible pop. Once you get 440 of those per second you've got a concert "A" musical note (grin). Any coil can do that, if there's a little flaw in the wire insulation so instead of going end to end the electricity short-circuits. So can any place that is supposed to be properly insulated. Aside -- if you were talking about digging into the guts of a monitor or TV, I'd be warning you how to avoid killing yourself by discharging the high voltage capacitor (you take a long wooden stick and a piece of chain, attach one end of the chain to a good grounded pipe or wire, then let the other end of the chain drape over all the exposed wires on the (unplugged) monitor til it goes snap-crackle-pop convincingly) -- high-voltage capacitors can hold a killer charge for literally weeks after the thing's been unplugged. It's different with car computers, less than five volts (much less than you can see or feel) of misplaced electrical discharge can screw them up. I guess with new cars that have computers in them you ought to ask good advice (not mine) about protecting the chips, as well as yourself, before messing with the electrical system. Quote Link to comment Share on other sites More sharing options...
Cougar Posted July 23, 2005 Share Posted July 23, 2005 Try looking to see if you can find any arcing going on at night when it is dark out. Quote Link to comment Share on other sites More sharing options...
Skip Posted July 23, 2005 Share Posted July 23, 2005 Jim, the idle air control valve (IAC) is sticking Located on the front of the throttle body.. (the gizmo that the thottle cable connects to) Has a wire and a rubber hose connected to it There is a picture and a cleaning proceedure in a previous post......... Good luck, hope you find the problem is as simple as this "shoud be" maintance item Quote Link to comment Share on other sites More sharing options...
MilesFox Posted July 23, 2005 Share Posted July 23, 2005 i remember working on jims car, we replaced the temp sensor for the ecu so we know thats good. the ecu kept pulling maf codes intermittently, as wiggling wires caused inconsistent troubleshooting jim, didnt you clean the aic, or have me clean it? i remember cleaning one there unless it was the one on the sedan. maybe when the motor(in the dl) was still in the blue wagon i cant remember. Quote Link to comment Share on other sites More sharing options...
86subaru Posted July 23, 2005 Author Share Posted July 23, 2005 thanks skip ,did a search did not find cleaning , Quote Link to comment Share on other sites More sharing options...
Skip Posted July 23, 2005 Share Posted July 23, 2005 Jim, I found 172 posts on it, I realize it's tuff finding the ones that tell you the procedure. The first one has a picture from the FSM that I posted. Hope this fixes it. http://www.ultimatesubaru.org/forum/showthread.php?t=27893&highlight=idle+control+valve http://www.ultimatesubaru.org/forum/showthread.php?t=32704&highlight=idle+control+valve Quote Link to comment Share on other sites More sharing options...
hooziewhatsit Posted July 23, 2005 Share Posted July 23, 2005 a trick to help remove the IAC I've found.... Use a set of vice grips to break loose the 4 screws, since there's no way to get a screwdriver on them. After that you should be able to unscrew them with your fingers. Quote Link to comment Share on other sites More sharing options...
86subaru Posted July 24, 2005 Author Share Posted July 24, 2005 got it ,thanks skip and everyone else Quote Link to comment Share on other sites More sharing options...
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