brucie-bonus Posted February 16, 2014 Share Posted February 16, 2014 Last week my supra developed a high idle problem once it was up to temp (sat at just over 1000rpm). Now this was only when warm, couple of times I tried it, it would idle as it should while cold/warming up but once it was upto temp it would idle at 1000rpm and feel rough. After having a wee nosey on here, yesterday I disconnected the battery to reset the ECU and since connecting it back up things are worse. Struggles to catch and looks like its now miss-firing. All I have done is disconnect the battery for couple of hours, reconnected and started. I let it run for briefly to see if it would clear in case it was the ECU re-learning but it never. Also there have been no warning lights come on, however, I used the torque app yesterday to see if there were any error codes and there were 2 showing, P1346 and P1349 both of which seem to be faults with the VVT. Im not sure how accurate the app/error codes are or if these occured with the high idle or not (last time I checked a year or so ago it was clear). Have I done something I shouldnt have? could there be a common problem causing both symptoms? Any advice or thoughts are much appreciated. Quote Link to comment Share on other sites More sharing options...
brucie-bonus Posted February 20, 2014 Author Share Posted February 20, 2014 Update... Tried it again and this time in worked, however, I still have the high idle when its warm. Every time I clear the error codes from the ECU, when the high revs start its the same error (P1346 VVT system) that flags up. I'm guessing not much is known about fault finding on the VVTi? I also spoke to the local Toyota garage and they said they could have a look at it, unless someone can suggest a respected garage around central Scotland I would be better going to? Quote Link to comment Share on other sites More sharing options...
David P Posted February 20, 2014 Share Posted February 20, 2014 If the fault code can't be interpreted. I'd begin with checking the cam-belt and then making sure there are no induction vacuum leaks. Quote Link to comment Share on other sites More sharing options...
chrispot Posted February 22, 2014 Share Posted February 22, 2014 p1346 is the cam position sensor for the vvti, try removing both cam sensor plugs and giving them a clean / push on and off a few times etc located on the inlet side of the head. regards chris Quote Link to comment Share on other sites More sharing options...
David P Posted February 22, 2014 Share Posted February 22, 2014 In future, I'll leave VVTI questions for chrispot guru. Quote Link to comment Share on other sites More sharing options...
brucie-bonus Posted March 7, 2014 Author Share Posted March 7, 2014 I finally managed to get to the bottom of this. Turns out it was a faulty Oil Control Valve (OCV). It never appeared as a fault but after finding a lot of information on the clublexus forums about the VVTi, there were quite a few people with similar problems and all had solved it by replacing this. Replaced it tonight after picking up the part and its idling exactly as it should be! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 7, 2014 Share Posted March 7, 2014 You mean the valve that controls the oil flow to the cam position actuator? Quote Link to comment Share on other sites More sharing options...
brucie-bonus Posted March 7, 2014 Author Share Posted March 7, 2014 Yup, that's the one. The torque app reffered to it as that when I had it disconnected. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 7, 2014 Share Posted March 7, 2014 Interesting, thanks for that. Quote Link to comment Share on other sites More sharing options...
David P Posted March 7, 2014 Share Posted March 7, 2014 Thank you for posting the solution. 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.
Note: Your post will require moderator approval before it will be visible.