carfreak85 Posted March 25, 2015 Share Posted March 25, 2015 After replacing my radiator I started with a distilled water/white vinegar mix, then three rounds of water flushes. On the water flushes I used the factory-preferred method and had some pretty interesting results.Before I explain what happened, let me tell you what did NOT happen:The engine did not overheat. The temp gauge didn't budge above normal at all after reaching operating temperature. I attribute this to massaging the radiator hoses a whole bunch before capping the system each time.The check engine lamp never came on. As in, not once. Not even a flicker.I did not change throttle position at all when the phenomena began, until noted in the video.It was repeatable enough to happen on three consecutive "burps."So, what did happen? About 6 or 7 minutes into my 10 minute burp procedure, I would lose control of the throttle. Mind you, this is a drive-by-cable throttle, and I hadn't changed the throttle position at all.When this happened the rpms would drop down to about 1,250, then up to 1,750 rpm and repeat until I either floored the throttle, or backed out and let the engine idle. What the hell is going on? Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted March 25, 2015 Share Posted March 25, 2015 (edited) hmmm did the rad fans cycle on-off? Edited March 25, 2015 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
carfreak85 Posted March 25, 2015 Author Share Posted March 25, 2015 Yes, although it was hard to hear over the exhaust. Quote Link to comment Share on other sites More sharing options...
carfreak85 Posted March 31, 2015 Author Share Posted March 31, 2015 I had one fellow on NASIOC suggest that it could be an IAC gasket issue, but I don’t have any sort of idle problems. The engine has only misbehaved during the coolant burp procedure. Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted March 31, 2015 Share Posted March 31, 2015 (edited) Was the battery disconnected while doing the work? Also What year? and does it have Electronic throttle? Edited March 31, 2015 by Fairtax4me Quote Link to comment Share on other sites More sharing options...
carfreak85 Posted April 2, 2015 Author Share Posted April 2, 2015 2002 WRX, drive-by-cable. Battery was connected, car was running when it happened. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.