idosubaru Posted July 25, 2014 Share Posted July 25, 2014 1999 EJ22 with 90,000 miles in great condition as far as I know. Car drives fine but sometimes stalls while coasting. Classic idle control symptoms but it always has a cam sensor code after this happens?!?! Replaced cam sensor and timing belt tensioner and still does it. Cleaned idle control motor today. What else? Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted July 25, 2014 Share Posted July 25, 2014 (edited) weird - subscribing to learn. sure the code isn't TPS? clean/replace crank sensor? low system voltage? Edited July 25, 2014 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
idosubaru Posted July 25, 2014 Author Share Posted July 25, 2014 P0340 - cam sensor I pulled and cleaned the idle air control valve. I'm hoping the valve was sticky - causes the familiar "stalling while coasting" symptom - then that stalling causes an odd signal for the cam sensor that triggers the check engine light for the cam sensor. Seems speculative and possibly not going to be the case. I'll report back if the check engine light comes back again after this cleaning. Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted July 25, 2014 Share Posted July 25, 2014 (edited) maybe there's just enough weakness in the tensioner and stretch in the belt to momentarily cause enough 'jerk' to throw the cam sensor out of sync? Or a cam gear is loose/cracked? weird Edited July 25, 2014 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
idosubaru Posted July 25, 2014 Author Share Posted July 25, 2014 did the same thing with two different tensioners. new belt. so far the 0340 seems to be from: 1. an artifact of the stalling due to the idle control valve - it's now clean so time will tell 2. it's possible i installed the wrong cam sprocket (Phase II's having two different varieties) - but it ran fine for months before starting to stall, i think it would have stalled immediately after installing the wrong cam. any other suggestions? Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted July 25, 2014 Share Posted July 25, 2014 (edited) did the same thing with two different tensioners. new belt. so far the 0340 seems to be from: 1. an artifact of the stalling due to the idle control valve - it's now clean so time will tell 2. it's possible i installed the wrong cam sprocket (Phase II's having two different varieties) - but it ran fine for months before starting to stall, i think it would have stalled immediately after installing the wrong cam. any other suggestions? nothing specific from me, I'm just brainstorming. Um, would it throw the code if you clutched in and braked to slow the car? Or if you did some high revving when parked? That is, does it require engine braking to throw the code? To me, that would be more a mechanical/sensing/maybe wiring issue than 'charging circuit' but........? Intermittent signal dropout could be a general electrical fault - or bad connector or grounding I guess. Edited July 25, 2014 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
idosubaru Posted July 25, 2014 Author Share Posted July 25, 2014 automatic. good call, but doesn't do it enough to test it and rev it up to high rpm. Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted July 25, 2014 Share Posted July 25, 2014 Might make sure the terminals are clean in the big connector on the bellhousing. And make sure its plugged in all the way. Another thought is a chafed wire under the intake manifold. Could be grounding the signal only when the engine moves in a certain way. Try the wiggle test! 1 Quote Link to comment Share on other sites More sharing options...
idosubaru Posted July 25, 2014 Author Share Posted July 25, 2014 I reseated the main connector, inspected the sensor contacts, they all look solid and good - i'll slap a multimeter on the pinouts. Oh please tell me cleaning the idle controller does it if there's no obvious things to test/check!!! Quote Link to comment Share on other sites More sharing options...
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