Ford ranger iac valve problem Today when I tried it, the rpm's were still high upon start- about 1600, but dropped to about 600 this time when I unplugged the IAC valve. I read that unplugging the battery could reset the computer, so I left the battery unplugged overnight. 0L Idle Air Valve Problems - I bought a 98 4x4 Ranger last weekend. Also when coming up to say a stop light or cruising though a parking lot it doesn't want to settle Apr 5, 2019 · Yesterday I unplugged the IAC valve and the rpm's dropped from 1600 to about 900. Sometimes a weak idle air control motor will can cause engine problems without triggering a MIL (check engine) light. It seems to want to idle a little high when it?s just setting. Symptoms of a Bad IAC: Sep 9, 2007 · 1983 - 2012 Ranger & B-Series - 3. It runs pretty well except I have an idle problem. Dec 2, 2023 · 1983 - 2012 Ranger & B-Series - Idle Air Control valve issue 1998 ford ranger. Not the biggest problem. At startup it revs to 2000 and stays there between 1 and 2 minutes. But I know it is the problem. My original idle air control valve was very dirty and it was causing it to idle at roughly 600 RPMs or lower due to its sticking shut, Recently I bought a IAC valve from AutoZone and it was having complete issues with idling where at times it would rev itself up to 2,000 RPMs and stay there until I restarted the engine when in park after I . The only change done recently was a new Autozone replacement IAC. Sometimes at highway speeds it stays at 3000 rpm's which makes it hard to get it to a stop. - I can’t seem to clean the IAC valve sufficiently and a new one doesn’t work. Inspect vacuum lines when servicing the idle air control valve and replace any that are broken or dilapidated. When an idle air control valve fails it can cause the engine to idle erratically and even stall. May 27, 2015 · I have a 2003 Ranger Edge that has a serious idle problem. After that it falls to just below 1000.