SUBARU3 Posted February 16, 2016 Share Posted February 16, 2016 I have 4 (1995) EJ engines, but my 95 Legacy is the only one that when it's started cold, it "revs" up to like 3000 for just a second, or 2 immediately on startup. It then has normal cold idle and then warms up to a lower normal idle. No other issues...perfect car. I just HATE to have a cold car REV, even for just a second! The colder it is out the higher it revs. Summer is no issue. Ideas? Can this be adjusted? Thanks! Todd 1 Link to comment Share on other sites More sharing options...
legacy93wagon Posted February 17, 2016 Share Posted February 17, 2016 bump for todd Link to comment Share on other sites More sharing options...
mikaleda Posted February 17, 2016 Share Posted February 17, 2016 Could be a faulty ecm coolant temp sensor reading it as colder than it really is. The two prong temp sensor is the one that goes to the ecm, try replacing it. 1 Link to comment Share on other sites More sharing options...
Fairtax4me Posted February 17, 2016 Share Posted February 17, 2016 Vacuum leak. Possibly a bad injector rail seal, or bad manifold gasket. Try spraying some throttle body or carb cleaner around the base of the manifold and see of it changes the idle. (After warming up) Link to comment Share on other sites More sharing options...
Olnick Posted February 17, 2016 Share Posted February 17, 2016 Hey, Fairtax--where is that injector rail seal? How do you access it to replace it? (Just wondering if that could be the root of my son's P0106 problem!) Link to comment Share on other sites More sharing options...
Fairtax4me Posted February 17, 2016 Share Posted February 17, 2016 P0106, 99 times out of 100 is just a loose or broken vacuum hose running to the switching solenoid or the MAP sensor. It should be hooked to a T off the back of the number 3 intake runner. One side of the T goes to the FPR, the other goes to the switching solenoid. Link to comment Share on other sites More sharing options...
Olnick Posted February 17, 2016 Share Posted February 17, 2016 Thanks, Fairtax. Maybe we got the 1 time out of 100! Swapped MAPS & PSSSV solenoid--no change. Replaced vacuum hoses and "tee"--no change. Was hoping there might be another seal that could be the culprit. Oh well, back to the drawing board! Todd--sorry, didn't mean to hijack your thread. Link to comment Share on other sites More sharing options...
SUBARU3 Posted February 19, 2016 Author Share Posted February 19, 2016 No problems Olnick Thanks for some tips...I will try Link to comment Share on other sites More sharing options...
Bushwick Posted February 20, 2016 Share Posted February 20, 2016 Did you replace ALL vacuum lines under the hood? Even small sections under intake manifold runners? Did you inspect the brake booster hose too? Think mine revs to 1500 rpm briefly when cold, but doesn't hang there too long. And mechanically it's running as good as it ever will, but it's had IAC cleaned, throttle body and throttle blade cleaned, accelerator cable lubed as well as the linkage, ALL vacuum lines replaced, including the hard to reach sensor under the passenger-side intake runner and EVAP hoses, fuel filter changed, plugs/wires, air filter, etc. Basically anything that improves the engine's ability to go w/o issues. Your IAC may be sticking or getting an incorrect signal to up idle more, or you might have leaks around fittings going into it. Link to comment Share on other sites More sharing options...
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