drako Posted August 14, 2013 Share Posted August 14, 2013 Basically my car has been idling strange since I've owned it and im trying to get down to the bottom of it by changing small bits like vac pipes, sensors etc ...It hunts and the revs fluctuate terribly. When driving and over running it jerks back and fore viciously sometimes forcing me to dip the clutch or changing down gear to get the revs higher. When cold it will rev to 2k and slowly drop.. Once the engine is hot it will still hunt but the revs will drop down to 500 RPM Also whats this valve? Its joined from the throttle body to the vac tank on the bulk head just beside the fuel filter and the wires going to it have broke... Any help would be greatly appreciated as this problem is just getting to me Thanks Quote Link to post Share on other sites
StuDoc 72 Posted August 14, 2013 Share Posted August 14, 2013 (edited) Think thats for the aircon.Check theres not a vac missing off the inlet mani somewhere. Edited August 14, 2013 by StuDoc 72 Quote Link to post Share on other sites
morgey Posted August 14, 2013 Share Posted August 14, 2013 Thats not aircon my brothers celica and corolla gti had it neither had aircon Quote Link to post Share on other sites
StuDoc 72 Posted August 14, 2013 Share Posted August 14, 2013 Is it not Id need to check mine rang a bell thought id ripped it out when doing the aircon. Does look like a pretty familiar 1. Infact it is the 1 that is attached to the airbox normally whatever it does. Quote Link to post Share on other sites
JayJ Posted August 14, 2013 Share Posted August 14, 2013 That is for a carbon canister, it has something to do with the fuel tank breathing Quote Link to post Share on other sites
drako Posted August 14, 2013 Author Share Posted August 14, 2013 Well it's joined in between the vac tank and the throttle body/inlet. It's got two wires going to the sensor/valve which when touching the contacts doesn't do a thing :S confused! Quote Link to post Share on other sites
JayJ Posted August 14, 2013 Share Posted August 14, 2013 (edited) Someone mentioned on another thread that this valve closes/opens as the engine warms up. Maybe it will let the extra fumes out of the canister and engine burns them. Edited August 14, 2013 by JayJ Quote Link to post Share on other sites
AdamB Posted August 14, 2013 Share Posted August 14, 2013 Have you tried the idle control valve mate? Quote Link to post Share on other sites
JayJ Posted August 14, 2013 Share Posted August 14, 2013 Jay made a good post about the carbon canister and how it works on TGTT Quote Link to post Share on other sites
drako Posted August 14, 2013 Author Share Posted August 14, 2013 Jay made a good post about the carbon canister and how it works on TGTT Thanks JayJ Just had a look on TGTT and its the VSV solenoid which the ECU controls for emissions. Ill check to see if theres power going to the wires tomorrow. Dont think there is though :/ Quote Link to post Share on other sites
JayJ Posted August 14, 2013 Share Posted August 14, 2013 Thanks JayJ Just had a look on TGTT and its the VSV solenoid which the ECU controls for emissions. Ill check to see if theres power going to the wires tomorrow. Dont think there is though :/ No problem, I think it shouldn't affect your idle though, but you can test it by taking the vac line off and then blocking the hole from mani. As AdamB said the problem could be your ICV. Quote Link to post Share on other sites
drako Posted August 14, 2013 Author Share Posted August 14, 2013 Well i stripped the ICV by pulling the 4 metal tabs apart and cleaning the diaphragm and ports but when cleaning i noticed that the diaphragm spring (funny ninja throwing disc looking thing) was broke at one point where its held on to the seal. Its held on at 3 points on a good one. Does that make sense? Quote Link to post Share on other sites
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