Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
Hi,Was the IAC actually conmfirmed failing or was it just replaced trying to fix the high idle? Was an aftermarket IAC used (there is a known issue with aftermarket IACs not working in this year range)?
And I suspect that the condition did not improve at all with the IAC replacement, or even possibly got worse?
Thanks.First off we need to get the original IAC back in there. Aftermarket IACs are notorious for not working at all on these... blame cheap Chinese replicas I guess, but they are pretty much 1/10 success rate right out of the box.With the original IAC installed, and the elbow installed (do not detach the duct work at all as it doesn't benefit or help in diagnosis), what is the idle speed exactly?What about after you turn the AC on (or pull the steering wheel hard one direction), doe sthe idle go up or down at all?
Thanks, ***** ***** idle goes down, the IAC is not working.I take it we haven't done that check on the original IAC yet and we're waiting now while it is reinstalled?
You can just reply back to this page.... this ill stay open while we wait.If you need to close the page/turn off the computer/etc you can return to this page by logging into the site or clicking on one of the emails you should have received when I posted here.Just allow me a few minutes to respond in case I am on a break or with another client the moment you post.
Thanks.Please leave the engine running at 2100 and take a can of brake cleaner or unlit propane and spray around the engine... the intake manifold, hoses, etc and see if you can manipulate the idle at all (if there is a vacuum leak it will draw in the added fuel and affect the idle).
Thanks.If there are no vacuum leaks then ruling anything terribly unusual out (like your timing belt set wrong, or bad custom tune) it sounds like you were probably right on the money originally with the IAC... you just need to get a good one.If you do not have a dealer near you, then you should try the local junk yards (a used one is more reliable than a new aftermarket one), or checking online through a reputable dealer like Mentor Mitsubishi. You may also find a used one on evolutionm.net classifieds as well.Whatever you do, just avoid aftermarket ones... as you've seen first hand, they are junk unfortunately.