movistar Posted October 6, 2003 Share Posted October 6, 2003 Hi new to all this as this is my first thead,can any one tell me where my i.a.c valve is located as i want to clean it out......... in hoping this will cure my too high idle problem when cold(about 1600rpm at the mo but drops down to normal....eventually!!) many thanks. Quote Link to comment Share on other sites More sharing options...
movistar Posted October 6, 2003 Author Share Posted October 6, 2003 sorry ...........it a 93 u.k TT auto! Quote Link to comment Share on other sites More sharing options...
Paul Laing Posted October 6, 2003 Share Posted October 6, 2003 I wouldn't mind knowing this aswell, as mine also idles quiet high, but i just thought this was normal? If not then turning it down would be great, as the neighbours must hate me Paul Quote Link to comment Share on other sites More sharing options...
Digsy Posted October 6, 2003 Share Posted October 6, 2003 I think its normal, guys. At least, mine does it too. Quote Link to comment Share on other sites More sharing options...
Paul Laing Posted October 6, 2003 Share Posted October 6, 2003 Spoke to a few people about this on supraforums. Apparently it's normal and can't be turned up or down. Paul Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 6, 2003 Share Posted October 6, 2003 Half way along the inlet on the intake cam side. Quote Link to comment Share on other sites More sharing options...
Keith C Posted October 6, 2003 Share Posted October 6, 2003 Mine does that as well Quote Link to comment Share on other sites More sharing options...
dandan Posted October 6, 2003 Share Posted October 6, 2003 Mine idles high, typically 900-1000rpm, sometimes it drops a little lower but NEVER to 600rpm. When sat idling it cycles from 900 up to 1100 for around 10 or 11 secs then back to 900 for about 40 secs then up again. Quite annoying! Any ideas people or anyone have anything similar? Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted October 7, 2003 Share Posted October 7, 2003 Mine normally idles just over 500. The jumping about is probably caused by the air con compressor starting and stopping. Sometimes I get the high idle (>1000), not had it for a while though. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 7, 2003 Share Posted October 7, 2003 They also seem to rise/drop dependant on the quality of fuel. If I ran race fuel, or Toluene in mine the idle RPM would drop below 500. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 7, 2003 Share Posted October 7, 2003 Originally posted by Terry S They also seem to rise/drop dependant on the quality of fuel. If I ran race fuel, or Toluene in mine the idle RPM would drop below 500. Isn`t this controlled to some degree by the ECU? When i start my car it shoots up to about 1700 then about 3 - 6 seconds later settles at 700 - 800 rpm. Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 7, 2003 Share Posted October 7, 2003 Mine:- If STONE cold (early morn') - ~1400/1500 and almost immediately drops to ~1300. Then, slowly drops as temp rises to the 'bottom' white line on Temp till ~ 1000. then as it warms to the '1/2' way mark it does the final settle to ~800. I had my idle rise to ~1200 - no matter WHAT temp - a month or two ago - that WAS the IAC/ICV.. it had a small piece of 'gasket' caught under it's 'seat' so COULDN'T shut to the HOT position ! ! ! A/C makes it rise/fall by ~200 revs - ie. 800-1000-800-1000 (or ~200 variation if still on high Idle) ? ? ? ?............ Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 7, 2003 Share Posted October 7, 2003 for info........ Quote Link to comment Share on other sites More sharing options...
dandan Posted October 7, 2003 Share Posted October 7, 2003 I understand that air con will result in rise/fall of rpm but what if rpm rises and falls in the pattern i described above regardless of aircon on or off? I always run optimax from same place so for me it's not fuel related. Cold start 1200-1300 ish then drops very soon to 900ish. Then begins cycling upto 1100 is and back and forth. Any ideas, or areas i can investigate? Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 7, 2003 Share Posted October 7, 2003 NO, you're right, shouldn't really vary up/down once warmed properly ! ! ! Not by much anyhow. (I suppose mine alters by ~ +/- 50 ? ? ie 750-850 -ish ? ? but, even then, only slowly if REALLY thrashed or cruised or sumthin' ?) Minor air leak ?? Is it sort of 'Hunting' ie High-Low-High in ~1/2-1 second cycles ? ? ? ? FatS. Quote Link to comment Share on other sites More sharing options...
dandan Posted October 7, 2003 Share Posted October 7, 2003 No it's odd. It will idle at say 850rpm for about 40secs then rise to 1100rpm for 10secs then drop back down again. Then cycles as described. I'm sure it's not a leak as it makes a clunking noise when it rises (as if some mechanism stepped in to raise it on purpose). It follows a regular pattern too. Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 8, 2003 Share Posted October 8, 2003 mmmmmmm........ the 'CLUNK' sounds exactly like the Air Con clutch locking in ! ! ! ! ! you SURE your A/C isn't on when it happens ! ! ! (nb. you know it comes on regardless if you switch the SCREEN position on ? - NOT being PATRONISING ! ! ! ) FatS. Quote Link to comment Share on other sites More sharing options...
dandan Posted October 8, 2003 Share Posted October 8, 2003 I'll double check to make sure, i've got a feeling it may well be when the aircon is on. Should it cycle up and down though? Quote Link to comment Share on other sites More sharing options...
400BHP Posted October 9, 2003 Share Posted October 9, 2003 Originally posted by Steve W mmmmmmm........ the 'CLUNK' sounds exactly like the Air Con clutch locking in ! ! ! ! ! you SURE your A/C isn't on when it happens ! ! ! (nb. you know it comes on regardless if you switch the SCREEN position on ? - NOT being PATRONISING ! ! ! ) FatS. Steve, not on my UK motor it don't... Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 9, 2003 Share Posted October 9, 2003 What do you mean "not on your UK.." AFAIK, ALL (UK/JAP) cycle up/down with A/C... it's SUPPOSED to to compensate for the drag on the engine...... [ and, ALL will make a fair 'clunk' that's just what A/C is like ] and the A/C comes on when you select the SCREEN (only) so as to automatically clear the screen (the OTHER use for A/C). Quote Link to comment Share on other sites More sharing options...
400BHP Posted October 10, 2003 Share Posted October 10, 2003 Yeah, it does surge when the a/c compressor clutch engages and you are right about the extra strain, but when I push windscreen it does speed up the blower and change to auto, but it doesn't start the a/c up, on mine anyway. Nice avatar BTW! Quote Link to comment Share on other sites More sharing options...
Steve W Posted October 10, 2003 Share Posted October 10, 2003 mmmmm........ perhaps it's only when cold ? (can't remember using SCREEN button when warmed up... have to try it ?) or, perhaps my controls are SPLIFFED ? ? Anyone elses go over to A/C when SCREEN is pushed ? ? ? Quote Link to comment Share on other sites More sharing options...
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