RE: 1990 unfinished project. odd idle @ all rpm's

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RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 12:52:22 PM    sir_nasty Posts: 6309 Joined: 2/23/2006 Status: offline It's not normally open much at all at idle (if any really....) something to check on it though is make sure the plate that opens (I've always just called it the butterfly...) is tight, if I remeber right there are two screws that hold that plate to a little cross piece, make sure they are tight so that it isn't just flapping around in there...  I'm also really curious about this missing screw.... _____________________________ 1981 Civic Station Wagon - ROhnda (Really Old Honda) 1981 Honda CB650 Motorcylce - WHEE What More can I say? 2000 Lexus RX 300 - Oooh baby my wife let me drive it once!! Quote: Life''''s great but it''''s not all beer and skittles (in reply to ericschillin) Post #: 31

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:00:45 PM    JimBlake   Posts: 3285 Joined: 5/31/2006 Status: offline Throttle should be as far closed as possible without wedging stuck.  When idling, very little air goes thru the throttle.  Almost all idling air goes thru that hole & thru the IACV/FITV and thru the idle bleed screw passageway. Setting the "base" idle (IACV unplugged) at a low value (600rpm or what?) is done to allow the IACV to operate within it's designed range of operation.  It's not good for this valve to operate very very close to full-closed. _____________________________ '03 Accord & '07 Civic '01 Saab 9³ & '05 9²x (in reply to ericschillin) Post #: 32

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:07:46 PM    JimBlake   Posts: 3285 Joined: 5/31/2006 Status: offline quote: ORIGINAL: sir_nasty ...  I'm also really curious about this missing screw.... You mean my comment back up there somewhere? At first, I just wanted to be sure that he was talking about the proper air hole that's supposed to be there.  I thought (not sure?) that certain years the idle adjust screw is actually INSIDE the throttle bore.  If that screw were completely missing, it would provide a large leak path to bypass the throttle.  I just wanted eric to verify that the screw was actually present & accounted for. So, Eric, is that screw missing? _____________________________ '03 Accord & '07 Civic '01 Saab 9³ & '05 9²x (in reply to sir_nasty) Post #: 33

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:28:48 PM    sir_nasty Posts: 6309 Joined: 2/23/2006 Status: offline that's my thoughts too.... I may be mistaken but I don't know of any holes that should exist in there... there should be a screw or adjustment or plug of some sort in that hole.... I'm curious about what's missing as well.... _____________________________ 1981 Civic Station Wagon - ROhnda (Really Old Honda) 1981 Honda CB650 Motorcylce - WHEE What More can I say? 2000 Lexus RX 300 - Oooh baby my wife let me drive it once!! Quote: Life''''s great but it''''s not all beer and skittles (in reply to JimBlake) Post #: 34

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:40:44 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline i got a few pics. i'm going to go clean out the body and butterfuly more just for the hell of it, plus its daytime. and i'm going to reset my IACV again now that the car is running better than ever. wont hurt. so here's what i'm working with.. i got the car and they said it was a 1990 whiich it is, with a newer 1992 engine. 2.2. with about 90k. so i dont know if that means anything. Thanks. [IMG]http://i18.tinypic.com/42lbz91.jpg[/IMG] [IMG]http://i17.tinypic.com/43pvmlj.jpg[/IMG] (in reply to JimBlake) Post #: 35

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:42:27 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline cool. i messed up with the pics. lets try this ... <a href="http://tinypic.com" target="_blank"><img src="http://i17.tinypic.com/43pvmlj.jpg" border="0" alt="Image and video hosting by TinyPic"></a> <a href="http://tinypic.com" target="_blank"><img src="http://i15.tinypic.com/46ynawx.jpg" border="0" alt="Image and video hosting by TinyPic"></a> (in reply to ericschillin) Post #: 36

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 1:43:44 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline close enough. just gotta click on the second highlighted link in each html code. two pics. (in reply to ericschillin) Post #: 37

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 4:47:32 PM    PAhonda   Posts: 1351 Joined: 9/22/2006 Status: offline Those two holes should be in there.  They bypass air from the filter to intake when the throttle plate is closed.  When your engine is cold, the hole on the bottom should try to draw air (that is controlled by the FITV and is open).  Once the engine is warm, the bottom one should not pull much air (FITV closed).  You can check the FITV by starting the car and covering the bottom with your finger.  You should feel a decent vacuum when the engine is cold.  Once the engine is at operating temperature, you should barely feel a vacuum over that bottom hole. Also, when the engine is warm, plug the top hole.  The engine should severly sputter and shut off due to lack of air.  If the engine still runs, you have an air leak somewhere (either from the FITV test from above, vac hose, or gasket problem). _____________________________ 1995 Accord EX MT (in reply to ericschillin) Post #: 38

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 6:16:51 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline well i took the throttle body off  today and cleaned it all out darn good, put her back on, and the car ran worse than before.  when i start the car, it now idel's reall high, than low than high, and so on for like 30 seconds. than stops and slows to its idle. i adjusted the throttle screw?(screw above throttle body) and the screw that the throttle hits/sits on. my buddy said to check the ECT thats connected to the thermosate housing.  see the holes in the throttle is what "sounds" lke the problem is. cause when i give it throttle, i can hear the vaccume that that hole(s) creates gets real loud, holds like its sticking, than drops.. all insync with the rpm's... its like 1)tap throttle 2) vacumme hole(s)get loud like a little turbo winding up 3)noice and rpm's stay high 4)sec or so later the loud vaccume noice stops and rpm's drop... if any of that made sense. its like i can hear something sticking inside them two little holes or something. i dunno. tomorrow i will do the FITV test. thanks. Eric  (in reply to PAhonda) Post #: 39

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 6:29:04 PM    PAhonda   Posts: 1351 Joined: 9/22/2006 Status: offline When I took apart my throttle body, my idle was stuck at 3000 rpms.  I was going crazy trying to figure out what had happened.  I eventually reset my ECU, so it could relean the idle settings, and the problem was fixed.  I would pull the 7.5 amp ECU backup fuse for 30 seconds and let the car warm up to operating temp. _____________________________ 1995 Accord EX MT (in reply to ericschillin) Post #: 40

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 10:22:03 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline so to reset the ECU i need to pull the 7.5amp backup fuse (from under the hood fuse box i assume)? so i turn the car on from cold start, pull the fuse out for 30seconds, put it back in and let the car keep running untill its at full tempature? Eric (in reply to PAhonda) Post #: 41

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 11:04:12 PM    JimBlake   Posts: 3285 Joined: 5/31/2006 Status: offline Not exactly.  With the car turned off you remove the fuse, wait, put it back in.  This erases the ECU/s memory. Then you start it cold, don't touch the gas pedal.  Let it warm up without touching the gas pedal.  This allows the ECU to 'learn' the behavior of all those cleaned/adjusted pieces in the idle-control system. How about the oil in your spark plug tubes?  It would be good if the engine wasn't misfiring during this 'learning' process. _____________________________ '03 Accord & '07 Civic '01 Saab 9³ & '05 9²x (in reply to ericschillin) Post #: 42

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 11:24:27 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline well i took a look down the spark plug tubes earlier today? and they looked clean, just a drop of oil. than again i took the old plugs out and maybe its gone cause what was in there dripped in the engine when i took the old one's out? that what i think happend. so basicly i need to take the valve cover off sometime soon, and put a new spark plug tube gasket, and a new valve cover gasket. man o man. first thing tomorrow i'm going to reset the ECU, but when i first start the car, it idles at about 2-2500 rpm for like a minute maybe more(never timed) i usually tap the gas a couple time to get it to drop. i guess let it drop on its own? (in reply to JimBlake) Post #: 43

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 11:28:34 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline also, it came to mind today... sometimes my breaks work, sometimes they go all the way to the floor it seems.. maybe its a booster leak or something. its so hard to find leaks cause the engine is running. but the 80% of the hoses are new.  tell you what, i'm going to have a new car by the time we get this fixed. haha. thanks. (in reply to ericschillin) Post #: 44

RE: 1990 unfinished project. odd idle @ all rpm's - 3/14/2007 11:31:08 PM    ericschillin   Posts: 34 Joined: 3/12/2007 Status: offline oh btw, once she idles down and is in nutrual, than she idel's fine. it at start up and when in gear and trying to drive it shuffles and stuff,. (in reply to ericschillin) Post #: 45

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