clevocortina 1,109 Posted April 2, 2014 Hey guys, I have a question im sure any of you mechanics on here have dealt with in the past. We have an au3 sedan it was dual fuel but it kept blowing converters so instead of paying 400 each time we gave up and were just running it on fuel. I just removed the gas system out of it since its just dead weight. so we also had to replace all the heater hoses as you are probably already aware. we ran the car to bleed the cooling system just off the throttle body to get that part of the job done, as the car was getting other work done at the time. anyhoo, now its all back together and runs fine all smooth and good power etc, but it has a low idle in gear, and will want to stall if you pull on any steering when the car is stationary.. Any ideas??? I have thought about pulling the IAC and throttle body and giving it a proper cleanout but really the only thing that's changed is the removal of the gas stuff, we also blocked up the excess holes and stuff so we don't think its a vaccume leak Share this post Link to post Share on other sites
gerg 10,871 Posted April 2, 2014 Iac and throttle body clean is a regular service item, so I'd start there and work my way up. Nulon carby cleaner is only about 12 bucks. I'd also suggest some Subaru upper engine cleaner. Works wonders on any engine with some kays up. Share this post Link to post Share on other sites
macman 774 Posted April 3, 2014 When you removed the LPG setup, did you disconnect the battery? If so, the computer needs to re-learn. There is a startup sequence you need to follow on first-start after reconnecting the battery, which will set all it's baselines. Some AU's respond to this, others don't. My AU2 I know this HAD to be done or it would just stall. My AU1 didn't seem to care if you did it or not. 1 Stevemack reacted to this Share this post Link to post Share on other sites
mcfly94 169 Posted April 3, 2014 I just did a full exhaust on mine, reset on the battery. 2min in neutral no air con 2min in neutral air con 2min drive no air con 2min drive air con took it for a blast but idling just under 600rpm in drive, its dropped about 25rpm. I think I may need my idle bumping up slightly due to the ph4480 and 2.5 exhaust, don't know yet as it could also be my fuel pump. Clean your throttle body and iac, and reset the kams and see how you go. 1 macman reacted to this Share this post Link to post Share on other sites
clevocortina 1,109 Posted April 3, 2014 thanks boys, I had the battery disconnected for a few days as I was doing other work to it and had the doors off and boot open etc. Share this post Link to post Share on other sites
mcfly94 169 Posted April 3, 2014 As you would already the au has self learn, so far from driving tonight its already improved and bumped the idle up Share this post Link to post Share on other sites
macman 774 Posted April 3, 2014 thanks boys, I had the battery disconnected for a few days as I was doing other work to it and had the doors off and boot open etc. Excellent, I'm very confident that the re-learn procedure (step-by-step above) will fix your issue. Let us know! 1 mcfly94 reacted to this Share this post Link to post Share on other sites
natho 1 Posted July 16, 2014 i suspect your IAC is not working. unplug it and see if it makes any difference. not sure about the AU, but on the EF the IAC shares the 12v feed with the injectors. given the gas system cuts this to turn off the injectors, the 12v feed to the IAC is cut and fed from elsewhere. you may need to trace the wiring for this. 1 Gaz reacted to this Share this post Link to post Share on other sites
clevocortina 1,109 Posted July 17, 2014 Sorry boys for not replying I forgot about it. Car is running well. Still need to do the IAC. just waiting for its service to be due and ill pull it off and clean it out properly then. Share this post Link to post Share on other sites
